ls1 heads on 5.0 tbi 1991
07-05-2009, 06:57 AM
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ls1 heads on 5.0 tbi 1991
can you use aluminum ls1 heads on a stock 1991 5.0 tbi?
i found some 90's corvette heads not sure which ones but whould any 90's corvette heads fit my camaro? if so how can i tell what ones they are?
i found some 90's corvette heads not sure which ones but whould any 90's corvette heads fit my camaro? if so how can i tell what ones they are?
07-05-2009, 10:33 AM
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Car: 1992 Camaro RS Convertible
Engine: L03
Transmission: 700R4
Axle/Gears: LS1 posi/disk 3.42
Re: ls1 heads on 5.0 tbi 1991
im pretty sure that a gen1 block and LS1 heads will not match up, but lets see what the experts around here have to say
07-05-2009, 11:10 AM
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Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: T56
Axle/Gears: 8.8 3.73
Re: ls1 heads on 5.0 tbi 1991
LSx heads are completely different and you wont get them to fit
Assuming you get past the bolt pattern/basket pattern differences, the valve train would be completely off
SBC valves are EIIEEIIE
LS1 valves are IEIEIEIE
Next go figure out how the coolant will run. SBC's use a coolant crossover built into their intake and specific ports on the heads for this
Swapping LT1 heads on requires rethinking this and either machine work or external coolant lines. You have no such luck for a LS1
Assuming you get past the bolt pattern/basket pattern differences, the valve train would be completely off
SBC valves are EIIEEIIE
LS1 valves are IEIEIEIE
Next go figure out how the coolant will run. SBC's use a coolant crossover built into their intake and specific ports on the heads for this
Swapping LT1 heads on requires rethinking this and either machine work or external coolant lines. You have no such luck for a LS1
07-05-2009, 04:21 PM
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07-07-2009, 11:30 PM
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Re: ls1 heads on 5.0 tbi 1991
Why don't you scratch the head swap for now and get some tuning equipment. Start off with some really basic stuff, like tune up the car first. Here's a list of the BEST way to start on an L03 based vehicle IMHO.
Tune it up. Get it running good.
Gears with a good posi, 3.42's auto 3.73's stick
Tuning Equipment. Get started early on a BONE STOCK motor so it's not such an ordeal in later on down the road. EBL FLASH and ZT-2 FTW!!!
Exhaust and an Intake. Popular choices are a Bored out (50mm) Edelbrock 3704 intake and Hooker 2055 headers. A good 3 inch catback is a must.
That's just for starters. It depends on how far you're willing to go. Here's a thread I wrote along with a couple others that should get you pointed in the right direction.
https://www.thirdgen.org/forums/tbi/...-synopsis.html
https://www.thirdgen.org/forums/tbi/...i-buildup.html
https://www.thirdgen.org/forums/tbi/...free-tune.html
Tune it up. Get it running good.
Gears with a good posi, 3.42's auto 3.73's stick
Tuning Equipment. Get started early on a BONE STOCK motor so it's not such an ordeal in later on down the road. EBL FLASH and ZT-2 FTW!!!
Exhaust and an Intake. Popular choices are a Bored out (50mm) Edelbrock 3704 intake and Hooker 2055 headers. A good 3 inch catback is a must.
That's just for starters. It depends on how far you're willing to go. Here's a thread I wrote along with a couple others that should get you pointed in the right direction.
https://www.thirdgen.org/forums/tbi/...-synopsis.html
https://www.thirdgen.org/forums/tbi/...i-buildup.html
https://www.thirdgen.org/forums/tbi/...free-tune.html
07-09-2009, 12:23 AM
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Re: ls1 heads on 5.0 tbi 1991
i would not ask about heads if i was not at that point. i have done the rear end 373 posi, got the headers and 3 inch all the way back.with a performer tbi intake now i am looking at some heads before i put it all on the car.
i thought it would be dumb to put on the intake and headers, just to take them back off when i get my new heads.
so now i would like to change the heads then i will do a bigger throttle body and get a new chip or have one burnt.
by the way the car runs great right now. just want faster
i thought it would be dumb to put on the intake and headers, just to take them back off when i get my new heads.
so now i would like to change the heads then i will do a bigger throttle body and get a new chip or have one burnt.
by the way the car runs great right now. just want faster
Last edited by monsterjam5000; 07-09-2009 at 12:28 AM.
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07-09-2009, 03:21 AM
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Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: ls1 heads on 5.0 tbi 1991
Sounds like your going to turn it in to fun set up, I would include a cam too.
I totally agree with Robertfrank on the tuning part, even more with your future mods. You really need to upgrade the ECM, you can download vinaldl for free and loock at the data to understand why.
I totally agree with Robertfrank on the tuning part, even more with your future mods. You really need to upgrade the ECM, you can download vinaldl for free and loock at the data to understand why.
07-09-2009, 11:56 AM
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Re: ls1 heads on 5.0 tbi 1991
i havent thought of a cam yet because im stil not sure on the heads i will use. i have no clue on how to tune these ecm computers so i am trying to do little mods so i wont have to get much tunning.
07-09-2009, 12:33 PM
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Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: ls1 heads on 5.0 tbi 1991
Unfortunately heads are a major mod on these cars and changing them will necessitate ECM tuning. With the stock cam the stock heads or any other stock GM casting will suffice and minimal performance gains will be had. You are at a great spot right now to learn how to burn/tune your own chips. If you do not do that now any further mods added to your car will make it slower and harder to drive.
07-09-2009, 02:46 PM
#12
Re: ls1 heads on 5.0 tbi 1991
i would not ask about heads if i was not at that point. i have done the rear end 373 posi, got the headers and 3 inch all the way back.with a performer tbi intake now i am looking at some heads before i put it all on the car.
i thought it would be dumb to put on the intake and headers, just to take them back off when i get my new heads.
so now i would like to change the heads then i will do a bigger throttle body and get a new chip or have one burnt.
by the way the car runs great right now. just want faster
i thought it would be dumb to put on the intake and headers, just to take them back off when i get my new heads.
so now i would like to change the heads then i will do a bigger throttle body and get a new chip or have one burnt.
by the way the car runs great right now. just want faster
At this point you are better off learning to tune believe me. I have almost every single bolt on you can think of and I haven't even really dug into the motor yet and I STILL need to tune this thing. I'm getting better at it but it is alot to learn but the benefits of this are awesome. Actually seeing and feeling the changes with each tune makes it worth it. With the EBL Flash and the ZT-2 even a total newb like me can get a grasp on this so don't be to intimdated by it.
In the thread I wrote I pretty much explained what the most popular heads for the L03 are so take your pick.
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