416 heads on tbi 350. Mines been great other than rough cold starts.
416 heads on tbi 350 varieties that RB69SS396Conv mentions. valves. The best bang for the buck is build a 383 bottom end, pocket port the stock heads, install a computer compatible camshaft and run the Edelbrock intake. I just saw a set of these ZZ4 heads on ebay, the aluminum 1. I would use the Vortec heads, but you'll need a Vortec style intake. The 305 just can't compete with 45 more cubic inches. 80" exh valve in a stock SBC head. i was told about the head gaskets leaking but never seen that happen at all. Castings ending in 191 are the low compression 76cc head. Aug 28, 2006 · yes the casting 416 305 heads r the way to go. Apr 7, 2010 · cold weather isn't a problem with vortec heads, unless you have a heat operated choke of some sort. Its a good motor for low rpm use. outintheshop cast no. Aug 22, 2014 · The 305 heads will put your SCR up over 10:1,but'the smaller valves/ports will cost your more power than the raise in compression will give you,plus,you'll be fighting detonation problems. 7 block in it, bored over to a 355, injector spacer, otherwise stock. Dec 19, 2005 · If i knew the exact reason as to why the SP heads start giving up power to the others at that point, I would gradly provide it. Which ones would give me the best performance? I am looking for some torque. If the intake is aluminum 4 barrel, save it. I do remember using the 614 heads on a stroker 305. 500ish. 70" - 1. The 1. also bought a new wiseco pro thru forged piston, 7cc. On a 350 use a cam with a 106-108 LSA choose duration based on rpm desired and cr. Cylinder Head Volume 65(cc) Piston Head Volume 5(cc) Gasket Thickness 0. 021" head gasket running at 9. The heads have 1. And then a 350 which would have the most torque and has parts readily available but is just more common and is larger than the others. 94"/1. Oct 13, 2019 · My 94 TBI engine has 160K and has the dreaded oil puff on startup, and uses about 1 quart every 3k. They are constructed more like older hi performance heads. Jan 24, 2012 · Flow about 190-195 @ . I don't remember the casing number but they are from an 85 if I remember correctly. For the classic perimeter bolt valve covers and regular old style intake the 416 and 601 are probably the way to go. 5 or 2. ), we highly recommend that premium quality hardware be used with your new heads. "In 305-350 Chevys, some '77 & later vehicles have heads #14014416 (have scalloped-out appearance at bottom), use non-rotator springs #5802 with stock rotators. 7 TBI or a tired set of 305 416 casting heads. ) Apr 3, 2013 · Wendell T. Just looking for some $800ish heads that the tbi will bolt up to. My machinist said there are differences between the 305 and 350 TBI heads, but you'd think the casting numbers would narrow it down more. I'm confident you could get pretty close to the factory 96-98 truck torque hp figures with that intake manifold and heads I linked to and some tuning time. 450, because it was meant for low end torque When building an engine you need to involve proper quench & with the 305 head on a 350 this takes an expensive D- shape piston. 1972 Malibu Sport Coupe - Victory Red on Black - 350/TH350 I do all my own stunts. One more important note, the L98 heads are a slightly heavier duty casting compared to the thinner 416's. Part Number: SUM-152123 4. Any help is greatly appreciated! Jul 30, 2013 · This would at a minimum require drilling new bolt holes into the head or egging those holes in the intake and making a wedge washer to correct the angle between the inake's bolt boss to the underside of the bolt heads. Aug 11, 2009 · Pull the heads and intake off the 305, probably 601 or 416 heads. 2 bolt blocks are used in light duty high compression trucks. 6 valves. 520/. The 305 heads are probably around 58-60cc. 1K views 7 replies 3 participants last post by webcat Aug 30, 2009 Feb 6, 2011 · The TBI heads fall flat on there face by 4000 RPM, but they do provide outstanding low end pulling power. 94s will even work. Cam, head, compression, exhaust changes; those things that change the mass flow thru the engine and those things that effect the factory's relationship of manifold vacuum (referred to Manifold Absolute Pressure or MAP in things you read about this stuff Sep 5, 2024 · Use the piston dish and head chamber size to get the compression ratio you want based on fuel octane you want to run. High compression heads on a TBI 454. If you have open chamber (70+cc) smog heads on the 350, the 416's will wake it right up. 5-1 but they Jan 4, 2024 · ALL vortecs lose torque to a TBI head under ~4K. These are only the basics to using any of these heads. etc. Injector flow of about 70 lbs is about ideal! May 9, 2011 · Frankly by the time you try to change these sows ears for heads into a silk purse you'll spend as much money as anew set of modern heads like the Vortec would cost and those will deliver about 40 more horses out of the box over the best ported smoggers. 190CC intake ports. 624s are the worst because all of them crack sooner or later. Then, just disconnect the computer. 041(in. 305 Vortec heads with TBI ? Jump to Latest 4. i ahve a 350 motor that is at the machine shop waiting for me to pick up and it has 10-1 ratio since they did the work. Thats what it was designed Find CHEVROLET 5. Have a set of long tubes and performer intake for it as well. Apr 15, 2021 · Make sure the finished chamber volume is right for the compression ratio of your 350 sbc that your fuel octane allows. That's quite a jump in compression. Jun 9, 2013 · on a side note there are two different types of "vortec" heads you have the tbi style and the true vortec cpi. My truck has been running way rich for a Dec 3, 2018 · Tbi castings are going to be low 60"s on combustion chambers cc's most other 350 castings after 1972 are going to be. The 083 L98 heads in final form are all the same job, same money cost but should make a bit more power. The TPI was down on torque compared to the TBI under 2,800 rpm, and again over 4,200 rpm. 75 stroke crank in it with 5. 520 on a 110 lsa, 750 holley dbl pumper, 4. They're actually a somewhat popular budget head for people who can't find Vortecs in the junkyard. Dec 27, 2011 · I am looking to help my 350 in the 72 Chevy PU pull a little better. Sep 28, 2004 · At least in 3rd gens, LG4 (VIN code "H") and L69 used the same head castings, 416 from 1982-1986, and 081 for 1987 LG4's and '87-up LB9's (VIN code "F"). For what its worth, I bowl blended a pair pretty quickly, left them in carbide, flowed low 230's with the stock valve, put them on an undecked flat top 350 engine. Re: Install 416 heads on 305 TBI 08-19-05 12:33 PM - Post# 763748 In response to Belair53SS I ran into some issues when I tried to use the serpentine belt setup off my 350 TBI with some 601 305 castings. That is 50 hp more than some of the 882 smog head 350s in the mid 70s. 60 or 2. May 12, 2010 · With the 416 head on a 350, they work well with a 1. Nothing fancy, but will run down the road just fine, has good sound, response and fuel mileage will remain to be seen. 14014416 were originally installed on 80-86 267-305- and 350 cid engs. 290/300 hp with tpi heads. Jan 4, 2024 · Yes the Melling cam is a cheap upgrade over stock if you ate going with TPI or 350 Vortec heads. i think the Performer RPM and the GMPP version of that intake have a hot water crossover under the carb where the exhaust heat riser would normally be. Except for 2 or 4 bolt blocks the bottom ends are the same. Jan 17, 2011 · blue88 wrote:Any idea if it is worth it to replace the stock "193" TBI heads with say a set of 487/993 heads from the early 70's without any other mods except opening the center intake holes to align with the old heads? Any real value here. Apr 14, 2014 · Stock installed height on 083/416 heads with stock retainers is in the 1. (piston was waaay in the hole), with a performer rpm manifold, a sizey hydraulic camshaft, 248/254 @ . the 96 pump is for a completely different system that Dec 20, 2009 · I know this is old, but I also have used 305 heads on a 350 and it was a beast, I had a 90 9C1 police car with the TBI 350 took off the tbi 350 heads and found flat tops. 72 intake and 1. Feb 15, 2018 · a TBI 350 is just as junky as any mid 70s to mid 90's 350. 60. Pull the TBI heads and intake off the 350, clean them up really nice, and use them as a fancy door stop. if you have a cold weather driveability problem- and you probably won't- just run one of the heater hoses thru the intake under the carb. Aug 29, 2002 · There is this set of TBI heads for sale off a 93 sbc with a complete valve job done hot tanked milled the works for $150 a pair. jpg. Figured since I need a new exhaust system anyway I will start from scratch with headers. . Use a 454 TBI and switch to a newer ECU and pay someone to tune it. Sorry I don't have my own measurements for Vortec heads, but you can search them on here. He's a drag racer and a chevy guy so I believe they're in good hands. It will be down 50 ft lbs on torque and at least 35 hp down versus the 350. Do not cam it all up. 15 lb TBI pressure regulator is a good idea. Oct 4, 2020 · I figure the difference in the heads in RPM range. Mar 5, 2004 · Another set is the World Products SR Torquer 305 heads. 100" diameter, . You'll also need an intake with the 87+ bolt pattern. My Queston is does anyone have the intake runner size, combustion chamber size, and stock valve size for the 416 casting heads he is building me? Jul 25, 2012 · 327- my dad has one in the garage he will sell to me, but it is basically a short block, 3782870 block, with 3782461 double hump heads, 1. I had a set of #993 heads they are 76ccs on a 350 with dished pistons . If I get a burette any time soon, I'll post the cc. 7L/350 Chevy small block Gen I Brodix Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Brodix Spread Port Style, for Nov 19, 2009 · As for size changes to flow in the TBI you need to think about all that's been done to 350. TBI heads also have different bolt angles at the center 4 which means you have to drill your intake or get a aftermarket one that fits them. Edelbrock told me when I bought their springs to get the set with all the same spring height. The chamber size (at least as far as the factory is concerned) is determined by the casting. So i'm looking at possibly putting vortec heads/intake on. Much more than that they are limited with flow and velocity issues as the larger cam will want to turn past what the heads will carry the RPM efficiently. But the TBI's have have EFI swirls in them and the cumbustion chamber that is kindof rounded near the intake and exhaust valves. 050" they make 355 HP/410 TQ with 10:1 compression. 53. I noticed vortec heads work and are easy to pull off but the intake is different and the tbi system wouldn't bolt up. 7L/350 Chevy small block Gen I Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Cylinder Head, 195cc Precision Jun 15, 2017 · I did 350 to one friend, 350 bored +. Swirl Port heads are TBI only to the best of my knowledge . It made killer TQ in a pickup and got outstanding MPG. I know the emmisions heads of the 7o's - 80's are crap. 56:1CR, is that right? Jan 24, 2012 · Flow about 190-195 @ . 50 valves 416: Late-model 305, conventional Apr 3, 2017 · For a 283, DO NOT use heads meant for a 350, or even the 327 Camel Hump/Double Hump heads (unless you have some serious domes on the 283 pistons). Oct 16, 2019 · Intake runner has the swirl vane just like a TBI head and the chamber is open not heart shaped like 906/062. quickest set I done with 91 octane in a daily driver 350 was 11. More power than the crap Ford ever needs. Jun 6. TBI heads are good for low-RPM torque, and they're not crack-prone. Thanks for the help. Hardened intake and exhaust seats. 7 rods. , or the TBI heads 187. if you want a better head for a 305 id look into 416 and drill for the added serp bracket holes, run a regular carb intake and a carb to tbi adapter. Sam454; 2000 & 350 TBI crate engine Jun 10, 2002 · be aware to that the 305 heads use a much smaller intake and exhaust valve, most are 1. The center bolt non-vortec heads(87-96) use a slightly different intake manifold. 416 heads are a better option than the TBI swirl ports most vans would've had. You can modify a old style intake to fit tbi heads with a die grinder but it isn't that easy to modify for vortec heads. However, they do flow considerably better than most earlier production line factory iron SBC heads, especially the TBI swirl port heads. Jun 4, 2011 · Well the 187 heads are TBI heads not HO heads. The Vortec heads will make a good bit more power in stock form over the "193" swirl port heads. That means I'll have the following setup: - Ultimate TBI Mods - TBI Stock Block/Lower End - Vortec Stock Heads (Drilled For Coolant Bypass) - LT1 Stock Roller Cam/Springs/Lifters - GMPP Vortec-to-TBI Intake w/EGR Bet bro thanks. don't wont go into the motor. 48 exhaust compared to most 350 heads being 1. Stick the heads and intake on the 350 and go. 84/1. I need to know what all parts I will need to buy/change in order to do this swap correctly and if I need to machine anything and what not. The 081, 083s and some 217s have the TBI intake bolt pattern. Jul 25, 2012 · These heads,as per www. the water goes from the heads then through the block) so those aren't what you want to use. Didn't do anything to fuel or computer or anything, other than an MSD coil. I have read all over that they are good heads, and with a roller cam . Nov 12, 2011 · I have these 14014416 casting number heads and was wondering what facts you guys could give me about them (I know they are 305 heads), and I would also like to know how well they would work out on a 350. 5:1 compression and a 600 CFM carb feeding 91 octane E10 for fuel. was 9. 50 58cc L98 D-port style heads for sale. 2. Oct 7, 2020 · The ones I have on my workbench right now are 1. I like the TBI adapter plate pictured below!!! The AE and PE needed for the Vortec heads is HUGE!!! The factory Vortec timing tables are a good place to start. If there's another supplier of direct-fit heads, I don't know about 'em. Aug 22, 2021 · Re: 1. 5" exhaust valves and small ports. The Eddy cam according to it's designer who use to be an editor at CHP magazine said it was for those early 80s 305 engines, I also agree a single pattern cam would be better for TBI heads or 305 Vortecs heads. Serpentines don't glue on early heads very well. Aug 28, 2011 · I have a set of freshly redone 416 ('86 305 HO) heads that I was going to use on the original 283 that is in my '67 Malibu, along with a Q-jet and a Lunati 60100 cam. Toss the TBI head and use the 416's of the 305. 10 gear, 4500 Jul 9, 2013 · Those heads are not gonna be a whole lot better than what you already have. 050, . Decent intake until around 4000 rpm. And of course the TPI is much more efficient than a TBI system. O. Dec 23, 2024 · THESE CYLINDER HEADS HAVE THE FOLLOWING: NEW HI-FLOW Aluminum 64CC cylinder heads. the 96 pump is for a completely different system that Nov 27, 2006 · This would at a minimum require drilling new bolt holes into the head or egging those holes in the intake and making a wedge washer to correct the angle between the inake's bolt boss to the underside of the bolt heads. Head flow was 234 in and 180 ish ex. With ported heads, tri-y headers, decent exhaust system and a 2" bore TBI on a bored 3704 manifold with tuning it made a good bit more power. I'm leaning toward the swirl port heads since they don't need to be rebuilt. so basically GM put bigger valves in a head without enlarging the bowl Dart's Small Block Chevy cylinder head lineup includes SHP, Race Series, Pro1, and Iron Eagle heads to maximize your high-performance street or dedicated race cars. 474/. 02/1. If you want to upgrade it, install small tube headers and possible mildly port/clean up the 187 TBI heads. Not even sure if the 1. The 081 and 416 heads are still lift limited and would need to be machined to accept higher lift cams. The original dyno run on my Frankenstein 350 as I described earlier laced down 412 hp at 6100 using a massaged Rochester 454 engine’s TBI. 50's 76 chevy stepside. 94 valve, with the chamber opened to unshroud the valve and a smaller cam in the 220 duration at . Feb 16, 2016 · I've done the 614 and 601 heads , but it has been so long ago that I can't remember the results. 4 bolt blocks are more complicated they can be found in some light duty and Jan 27, 2015 · Well I will say they are the best head I have ever ran for factory head that is ported. by mag2555 » Thu Apr 15, 2021 12:20 pm. Mar 24, 2013 · If you need heads with the accessory holes, the 186 castings are a good head as well. Angle or Straight plug design. even with the 1. Jan 6, 2011 · TBI heads flow very well to about 4500 RPMs so if you need accessory holes you might want to consider the head swap. in fact the bowl size on the 184 heads are the same as the bowl on the 194 heads . If you can get a set cheap enough they are worth taking a look at for a mild build. Nov 16, 2014 · To use the Vortec heads you will need Vortec type intake, self aligning rockers and the center bolt heads. _____ Dec 20, 2009 · OK, to calculate the compression increase, we need to know what heads you have on it now? The best general street improvement going to 305 heads on a 350, is with the 416 castings. Some export vans got a Vortec TBI 350. So your typical dirt track cams work well. Ugh. Jan 18, 2017 · The tbi heads have the center bolt holes drilled at a different angle than old carb heads do. I'll bet your ECM is all kinds of confused. I’m well aware that TBI heads are inferior to vortec heads but let me explain why I’m keeping them. 72" intake 1. Installed height of LS1/LS6 valves in 416 heads with LS1 retainers is 1. Theres bunches of Vortec 350s hitting my local boneyard. Compatibility: Fits 1987-1995 GM 5. 7L/350 Chevy small block Gen I World Products Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Oct 24, 2007 · I was told that these 416 casting heads are a little different. e. Oct 20, 2021 · The TBI 350, all the way. I currently have some smogger heads on it. 10 gear, 4500 Oct 25, 2021 · Why did my 10/82 305 have flat top pistons from the factory with 53cc 601 heads if GM did not interchange stuff as needed. i have done a few 350's with 305 heads and it does make one hell of a differance. Edelbrock Head Bolt Kit #8551 includes eight Oct 27, 2009 · 350 block with flat-tops, and either 416 or 882 heads, and the two cams he listed, either the little summit cam, or the little comp cam. Misread that you were building a 350. Nov 29, 2017 · Heads are #416 305, minor porting (very minor) and intake matching. The smallest chambers the Double Humps had, were the 461X castings with 62 CC's; the rest had 64 CC's. The heads are also being built there, since the guy at AM Performance on EBay screwed me by sending me mis-matched built and casting heads. 84-1. Cloyes dbl roller timing set, 30 over Flat Hypereutectic pistons, OEM rods, cast OEM Nodular Iron Crank. Those varied from 145 - 160 HP in bone stock form. and would this be a direct replacement without modifying the computer. 84 intake and 1. 50 valves they came with they will twist right up 7000+ rpm with smallish cams. Jan 8, 2021 · Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy 305, 350, and 454 engine with factory TBI injection. The usual valve job, and have em cut for umbrella Jul 17, 2013 · New guy here! How y'all doing? Like the title states, I've got a 1992 GMC 1500. was thinking maybe some tbi upgrades maybe even some 1. The 4 center intake bolts are at a different angle requiring the use of a grinder to retain the TBI intake. Jan 28, 2009 · Yup, -187 heads are the TBI "swirl port" heads that don't flow all that great. But, as an observer, I can tell you, that at 4400 RPM's, the SP heads, be it 305 heads, or 350 heads, start giving up power to the Vortecs, and 416's. I've dyno'd TBI and TPI on the SAME MILD L98 Aluminum head, roller cam 350 engine and never saw more than 25 ft/lbs of torque more from the TPI than the TBI. I want to remove the heads and install vortec heads with a carb. The 305 Vortec heads are not true fastburn heads like you find on the 350. Jul 5, 2019 · Ran stock TBI heads used Extreme Energy 268 cam/springs. and they had 1. Swapping to Vortec heads on a 350 can gain as much as 30 to 40 HP Upgrade your engine performance with our GM 5. Dec 31, 2010 · The best Vortec 350 heads are still 1. SBC 350 4B 305 416 HEADS CAST CRANK b. Runs really good with a carburetor on it,guess I will how it does with tbi on top. Later tbi and vortec heads use a different bolt pattern for the intake. Feb 12, 2011 · Little context on the engine,it is an older Gm crate engine. May 23, 2023 · i was looking at some nice 416 heads, with the small chambers and small valves. there is also a size difference in the cc volume in the intake runners, the 305 being much smaller. 305 vortec heads dont carry the superiority of 350 vortec heads, theres no benefit swithcing them out. Sep 24, 2015 · The key is in the heads castings ending with 193 are the high compression 64cc TBI head. Tuning shouldn't be much trouble, if your current chip won't drive decently, which it should, then finding a chip should be no trouble. this Oct 3, 2016 · For factory castings, mine were surprisingly relatively even and uniform, only need minimal clean up in the ports. Chevy Small Block Cylinder Head Identification Guide ‘69-’70 350/300HP, accessory bolt holes, most have 1. The 081s, 083s, 217s, and Vortecs are the only factory GM heads with the same accessory bolt patterns on the ends of the heads as the TBI swirl ports. Use a sheet of 3/8” alum and make a simple adapter plate to adapt to a TBI. Find CHEVROLET 5. Sep 24, 2024 · Picked up a nice set of 416 heads for free and thinking about putting them on a 350 in one my c10’s. Feb 8, 2023 · Having actually run a Vortec head TBI, it is time to load the parts cannon on all items he mentioned. 60 and I believe 64cc, which lines up with the thread from thirdgen. The pump capable of 70 psi works beautifully at 18 psi and was the same pump GM put into the 94-95 30 psi TBI systems. Another option, depending on your skill level and courage, is to buy heads with the older 6-bolt intake pattern. And the TBI heads have more efficient combustion chambers than the '70s smog heads. The best stock heads you can conveniently get for a 283 are 305 heads; specifically, the 80s ones such as 416 and 081, NOT the 70s ones such as 434, 741, etc. 835" on the intake, and 1. 50 exhuast. Aug 8, 2024 · Today you can hit that on 9. The heads would go on my sbc 350. Better heads would be any of the 305 H. The stock fuel pump and injectors are pretty much maxed out with the TBI heads. Sep 24, 2022 · The 4416 heads work nicely when fully ported with larger valves 1. this truck is the dd so it doesn't get a lot of the upgrade budget so it Sep 27, 2016 · I have a good used 350 tbi motor. The LT1 heads should flow much better, but has less compression. 305's big problem is it's tiny bore size. Aug 9, 2009 · The best option up until recently was to use 305HO heads, 416s or 601s. from what I understand they are basically the same, the 416 has the valve cover bolts around the perimeter and the 081 has 4 down the center. By the time you do that,you could get a decent set of Apr 9, 2022 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright May 9, 2009 · Hi i have a friend of mine that bought 14102187 heads supposedly from a Vortec,i found out that this heads are 305 as far as i have reserarched. Jun 15, 2017 · I did 350 to one friend, 350 bored +. 7 350 V8 Cylinder Heads TBI. I told John to do whatever he would do if it were his. I believe they were considered the HO 305 heads. 7L/350 Cylinder Heads and get Trick Flow Makes Serious Horsepower! Cylinder Head, Super 23® 195, Fast As Cast®, Assembled, 72cc CNC Chambers, 1 Cylinder Head, Cast Iron, Assembled, 72cc Chamber, 165cc Intake Runner, Chevy, 302, 327, 350, 400, Each. Aug 26, 2014 · HERES SOME SIMILAR CHEVY HEADS 350 heads, 1. 9. 350 heads could have as large as 76 CC chambers! Feb 19, 2010 · The vortec head is not a racing head! It dies when valve lifts over . Nov 30, 2009 · Edelebrock makes a "Center Bolt" head that matches the TPI and TBI engines. Malik » Tue Aug 24, 2021 1:38 pm When "Dart" produced their head for a 305 with a 1. 969" on the exhaust. " Dec 23, 2008 · the truck is my dd. 02"/1. Before I got it my project car had sat for 15 years but I cleaned the tbi up and it ran great. Sep 18, 2005 · The original 350 heads were probably 76cc chambers. I know that its on the large side, but its not going to cost anything extra. The eventual plan is an LS swap so I don't want to spend a ton. Compression Ratio using flat top will be closer to 10:1 . 940" intake valve they moved the intake guide toward the exhaust so, de-shrouding the chamber was not necessary. Just goes to show how well a LT1 cam runs in a TBI 350. Mar 25, 2012 · Heads : I have a fresh set of swirlport 350 heads off a 91 Chevy 5. Aug 2, 2008 · These both have the pre-87 intake bolt pattern. It has stock dished pistons and 882 heads right now. The L31 heads from the late-model 350 Vortec engine, introduced early in 1995, is the other type of cylinder head you need to look for on the used market. Those are better than your #193s, both for flow and for compression. That engine may have had 8. Aug 6, 2009 · It's true the L30 305 Vortec heads do not flow as well as the L31 Vortecs and they do not have the heart shaped chambers. The TBI intake from Edelbrock is the 3704. 6 valves, not sure, with 64cc chambers. 94" intake valves, Z28 valve springs and have been bowl blended. 75 to 1 . 50" unless otherwise specified 083 iron L98 head: 185 intake; 106 exh (smithtc) 083 iron L98 head: 194 intake; 118 exh (rhuarc30) 083 iron L98 head: 202 intake; 141 exh (source unknown, but reposted by F-BIRD) 113 alum L98 head: 199 intake; 149 exh (Chevy High Performance) I'm considering basically this set up: My block with Vortec heads, a mild cam, carb intake, bored & ported 350 throttle body good for about 620CFM, injector spacer, salad bowl/hypercharger, wide open spacer, 350 injectors with the pressure increased, TBI chip and TPI fuel pump, Long tube headers, 2. 5" pipe with an x pipe high flow cats, and Find 1987 CHEVROLET 5. Dec 17, 2011 · I do know the "416" 305 heads and a few others are the same port size as the smog 350 heads Yes they do and they have an excellent bowl to work with. 94 valves,64cc,and 185 runner. 72" range. The TBI heads are the worst flowing heads GM ever released. The -081 casting is supposedly about the same as the -416 casting, but with 87+ intake man bolt pattern. In order to sucessfully run 305 heads on a 350,they need serious porting,larger valves to increase flow. 96 seems to have been an odd year in vans with the 350. 60 epmmachineco. 50 valves are plenty big enough for general street work. Our main focus is to provide powerful and reliable Chevy 350 TBI Aluminum Cylinder Heads 2. HEAD BOLTS or STUDS:High quality head studs or head bolts with hardened washers must be used to prevent galling of the aluminum bolt bosses. 50" valves. I made +/- 430 hp on a high compression 350 with big solid lifter cam and big single plane intake. 510 and 208*/221* @ . I replaced the gummed up injectors, took the tbi down to each tiny individual part and cleaned them to within an inch of their lives, then put it all back together with all new gaskets and Oct 22, 2024 · Haven’t posted here for a while hope everyone is doing well. 94/1. Jul 26, 2023 · I need to replace heads on a TBI 350 and was wondering if anyone has experience with these: CHEVY 350 TBI ALUMINUM CYLINDER HEADS 2. Pulled apart the same engine in an 85 C10 and it had dished pistons and 416 heads. They were ported at home for many hours . Perfect for a low rpm truck engine, which is what they were designed to be on. And if you mount a 750 cfm carb you can pull 410-420 depending on how careful you bib the valve train and exhaust. I’ve got a tbi 350 in my 88 C1500 and I'm planning on switching over to a carb setup. It's got the original 5. I used the thinest head gasket possible . Extra thick deck surface. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Those heads look like LG-4 units considering the 80-86 run. The primary difference between the 416 and the 081 is the intake mount, as you have already noticed, and the center bolt valve covers. low rpm = small stock cam. Brown of Kansas City, Missouri, asks us if late 350 Chevy TBI heads will work on a carbureted 1970s short-block. 7 350 V8 models with TBI (Throttle Body Injection). Feb 11, 2015 · Actually I have located a long block in a 96 G30 at a wrecking yard that has the 880 series 350 roller block, but with TBI 193 swirl port heads on it instead of the Vortec heads. If your rebuilding the motor, don’t waste ANY money on those pitiful poor flowing TBI heads. Valve springs and a good magnaflux and valve job will cost you a couple hundred or more and that money could have been spent on decent new heads. this truck is the dd so it doesn't get a lot of the upgrade budget so it Jun 27, 2013 · I've tuned several Vortec heads with TBI conversions. Dec 1, 2022 · The accessory bolt holes for the passenger side bracketry are missing 2 bolt holes. -Will this head job outperform a 350 head ? Find CHEVROLET 5. Bronze thick wall guides. 02x1. Aug 16, 2021 · Ok, bought a pair of edelbrock rpm 6089 casting heads,2. Jun 2, 2007 · My current 95 350 TBI is wearin out and I want something to really wake the motor up. The TBI heads burn the air/fuel much more quickly. The '85 & '86 LB9 also used the 416 casting. Ditch the TBI style heads and use AFR enforcers with a regular 4 barrel intake. Cam: 268XE that I pulled out of another engine after 500 mi to go to a bigger cam. If it wasn't for a very tired 700r4, it would smoke the tires till ran outta road or let off. Last edited by Aedakin on Sat Sep 03, 2022 11:09 am, edited 1 time in total. 350 heads on a 305 would have to be. Functionally, they are identical- just use whichever one matches your intake and valve covers. On just about any combo the TBI heads will have better torque to 4,000-4,500, then the vortecs pull ahead. This is probably the best cylinder head casting that Chevrolet has ever produced for a production small block Chevy. You'll also need to swap out the distributor. Find out the answer here on HotRod. My questions are which intake to use, and headers or manifolds with out smog? This will replace the 305 in my 1983 k10. Nov 7, 2010 · All SBC gen I and Gen II heads will bolt onto the block. I was considering pulling a set of those, and having my machine shop going thru them. 6 rockers for a Little extra kick. " Feb 7, 2006 · If you're going to lower the compression, you'll have to go with dished pistons or a head with a larger combustion chamber. OEM components (valve covers, intake manifold, head bolts, etc. 7-1 compression or so. Aug 20, 2014 · Almost seems like they copied the build I had in my old G20 van in about 2005 and selling a stock TBI with a LT1 cam for alot of money. The Vortec heads will also need to be checked for spring pressure and seal to retainer clearance. 3. 72:1CR, and I have the same thing with a . 72cc's tbi heads are a cheap bump in compression, and actually have excellent exhaust flow characteristics and. 050 range. Mines been great other than rough cold starts. Designed for 1987-1995 fuel-injected models, these assembled and rebuilt cylinder heads enhance airflow and efficiency, ensuring optimal engine function. The -187 heads that you have are the "swirl port" TBI heads, which don't flow all that well on the intake side. Jun 7, 2005 · The machine shop is building me a 355 to replace it. The 267 heads have tiny 1. 416's are torque monsters on a 350 but no rpm range. Jan 24, 2020 · The combustion chamber size for the 267 heads is 58-60cc. I have a line on some 041, 993 and 416 heads. Raised intake roof for enhanced air flow. 84 intake valves, and ~150-160cc intake runners. Oct 12, 2007 · The #416 heads don't flow like guy think that they will . From your post those heads have been totally reworked. TBIs pretty much tune themselves withing reasonwild cam, huge compression will send it into a tizzy but overall TBI systems run off rich or lean and temp. Doing a cam on a 1991 suburban and am looking for a good set of heads to bump up flow and compression. 60 rebuilt for our consumers. This will make the stock TBI intake not bolt right on the 416 heads. Even the good Vortec 350 heads are a bit more crack prone than the TBI heads. Edelbrock also made TBI heads, and they're discontinued, too. The LT1 and 4 heads are set up for reverse coolant flow(i. so with a thick blue felpro head gasket, I slapped on the 416 305 heads I got from the junkyard, added an stock LT1 cam and put it back together, added a mail order chip that Aug 22, 2021 · Re: 1. 2 KB Views: 103. There has certainly never been a 1. That being said, If you're already looking at an LS swap, I'd go that route myself. Although you could do as I did and upgrade to an Edelbrock multiport injection. I just pulled them out of a set of TBI heads. TBI style intake manifold bolt pattern. Location: Heading for a bang up with Andromeda as we all are. 58cc would raise compression ratio a little over 1/2 a point, about 0. 94x1. I have a set of 416's and the castings are horrible. 88 350 tbi tear down. com Oct 20, 2007 · The #416 heads don't flow like guy think that they will . the original TBI heads were 64cc. If not, toss it and go swap meet scrounging. so basically GM put bigger valves in a head without enlarging the bowl Feb 15, 2018 · a TBI 350 is just as junky as any mid 70s to mid 90's 350. Oct 24, 2007 · I was told that these 416 casting heads are a little different. 94 int and 1. The vortec combustion chamber by it's heart shape promotes swirl & good quench with matched pistons. With a bit of DIY porting they'll outflow stock Vortecs, and I've even heard of people getting them cut for 1. Key Features. 525” lift. These heads make great street power in a computer controlled application. The Heads. Jul 2, 2016 · '081 head are 58cc heads- 083 are 64cc, for the 350 engine. Nov 15, 2002 · Sorry to revive this, but that means that I can fit 350 Vortec 906 heads on my 305, and not have compression problems? I have the 64cc 350 906 heads with 0cc of dish with a 4. Way too much fuel pump, the TBI runs between 12 and 15 psi regulated. These heads have larger than stock valves, the same combustion chamber as stock, and provisions to accept cams up to . 030" over, 3,48" stroke, flat top pistons, Comp 274 ft hydraulic cam, 1,5 rockers, stock 416 heads with 1,85/1,50 valves, 3 angle valve job, old Offenhauser 3x2 intake and 3 Rochesters, it was never dynoed but it ran 12,80/160kmh 1/4 mile in a -31 Ford. 94 Valve in Chevy 305 Heads (416 castings) Post by Walter R. Mar 26, 2010 · I don't know that those were ever stock, but I could be wrong. Better power, better mileage, smoother power delivery, it's all around a better power plant. 82 out of 5 stars Apr 28, 2006 · The TBI engines are flat tappet and have swirl port smog heads, while the TPI's have roller tappet and a decent head design. If I was wanting to cruise at 1550rpm @55mph the TBI motor would be a good choice. the only mods are cat back and msd coil, and a tbi spacer. Oct 26, 2011 · That F-car should have #416 heads. -This are intented for a 350 engine and i was told they will kill performance but they are porting them and installing 1. also got edelborock rpm ag 7501intake, crane cams 119701, hyd roller 222/230 112ls and crane hyd roller lifters. Vortec design combustion chamber. They all need all of the parts replaced to feel like a real v8. from what i understand 1996 is when gm used the real vortecs (10239906 and 12558062) most people refer to the heads found on 87-95 as vortec this is true to a point but the real deal in under the hoods of 96-02 L31 head are the ones that can be swapped with 1955 through the end of Jan 4, 2024 · Today I took off my intake and discovered I do in fact have roller provisions, so I'll be using the Vortec heads with the LT1 cam. Some of the TBI 350s were rated 210 hp. I am planning on installing a comp cams 12-300-4 cam. Oct 3, 2016 · SBC 350 4B 305 416 HEADS CAST CRANK a. going with Vortec heads will require a Vortec intake which costs more coin. Apr 21, 2018 · Having actually run a Vortec head TBI, it is time to load the parts cannon on all items he mentioned. com or in the April 2013 issue of Hot Dec 23, 2008 · the truck is my dd. I realize you need heads,but,if you are doing this swap to increase power,idk that the costs will justify the gain considering a new intake & other costs associated with the swap. 015" thick head gasket running at 9. according to everything I have read and found, from several Camaro and Monte Carlo forums, the #416 and #081 heads are about the most sought after 305 heads. Jun 24, 2007 · What's the difference between the exhaust ports on a TBI 350 head, a vortec 350 head, and an LT1 head? I ask, because the car I'm trying to have driveable by the end of summer, a '93 Caddie FB, complete with camaro pedals and a 4 on the floor with a hurst t-handle, currently has a 350 TBI, high miles, still runs good but I'm going to want more Nov 3, 2015 · Your biggest and cost effective gains from a TBI will be a good set of vortec heads, cam and lifters, and the ultimate TBI mods. 6 of a point. Nov 30, 2023 · Far as I know, the Summit TBI heads are "done". 50 exh. I have worked on numerous dozens of examples of both the TBIs and L31s both stock and modified. 6" valves, so i let my grinder and 416 heads rest a while. Flow chart for stock #14101081 305 head 87 95 May 7, 2011 · 416's and 601's (early/mid 80's 305 heads) are about as close to a performance head as you'll get on a production car from that era (the other heads used on 350's were pretty much junk, even the vette aluminum heads aren't significantly better), and can also be used well in a high efficiency, low end/mpg setup with good effect. Heads and piston question Views 416. I don't recall if the 416's were used on either the TBI's or the TPI's. Put a 3. (Basically, the heads that were used on the High Output 305's) Stock, they all have the "small-ish" 1. One thing to consider, the L03 engine was 87 up and has center bolt heads with the altered intake bolt angles in the 4 center bolts. vortec heads wold be nice buy i have a toy that those are going just trying to find a few bolt ons to get some extra horses. Lot of porting is needed to see big gains . epk retmq ftukp qofnz cbim uruskk iisu mvpgnpda kjo rjtal