Supercharged Ls1 Help
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Teching In
Joined: Jan 2006
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From: Zachary, LA
Supercharged Ls1 Help I'm in the process of convincing myself to do an LS1 swap in my '68 Camaro and would like to, eventually, put a supercharger on it if I do the conversion. My thoughts are to buy a used LS1/T56 combo for the conversion. My question is do I need to do anything special to the internals of the motor in order to run a supercharger later? I would like to obtain 450-500 hp. Please advise.
Thanks,
Chris
Thanks,
Chris
It will make your life a little easier if you start with a 99 - up drivetrain for your '68. The computer for the '98 is different, plus the heads use a perimeter style pattern for the valvecovers, and the coil brackets are different.
For the power level you are looking for, 8 psi of ProCharger boost and stock internals in the engine will be just fine. That '68 will fly!!! Bob
For the power level you are looking for, 8 psi of ProCharger boost and stock internals in the engine will be just fine. That '68 will fly!!! Bob
Thread Starter
Teching In
Joined: Jan 2006
Posts: 27
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From: Zachary, LA
Thanks guys. I was definitely planning on puting another cam in the motor before I installed it in the car. If 450-500 hp is achievable w/out a supercharger, I would like to try without first. What kind of motor mods should I do to get in this range? Like I said, I was planning on a new cam anyway (something with a little bump!...since this car is from the vintage era). Give me some recommendations on something that won't make the computer go crazy everytime I start it up.
Thanks,
Chris
Thanks,
Chris
Here is one route you could take.
Starting with a LS2 engine will give you a larger cubic inch displacement, and a stronger block, due to the siameized cylinder bores. Add a 4.00" stroker crank and you will have a 402. We use the Callies Racemaster crankshafts on a lot of our builds, along with Callies compstar connecting rods, and Diamond pistons. I'd shoot for a compression ratio in the 10.0/1 range, which will allow you to add an ATI ProCharger with 12 lbs + of boost in the future, if you choose to.
You will need an aggressive camshaft for the power that you are looking for. Something along the lines of the T Rex camshaft. It will have to be a thumper to make the power N/A, but with good tuning it will idle good.
Cylinder heads will make all the difference in the world. I'd go with a pair of AFR 225's, or something similiar in flow.
I'd use a FAST 90mm intake and a Nick Williams 90mm throttle body. Bob
Starting with a LS2 engine will give you a larger cubic inch displacement, and a stronger block, due to the siameized cylinder bores. Add a 4.00" stroker crank and you will have a 402. We use the Callies Racemaster crankshafts on a lot of our builds, along with Callies compstar connecting rods, and Diamond pistons. I'd shoot for a compression ratio in the 10.0/1 range, which will allow you to add an ATI ProCharger with 12 lbs + of boost in the future, if you choose to.
You will need an aggressive camshaft for the power that you are looking for. Something along the lines of the T Rex camshaft. It will have to be a thumper to make the power N/A, but with good tuning it will idle good.
Cylinder heads will make all the difference in the world. I'd go with a pair of AFR 225's, or something similiar in flow.
I'd use a FAST 90mm intake and a Nick Williams 90mm throttle body. Bob
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I've seen 382's make just under 500 rwhp on my Mustang Chassis Dyno, so it is feasible to imagine that a well prepped 402 could make 525 to 550 rwhp, which would be up there in horsepower at the engine. Bob
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450-500 flywheel hp is plenty achievable with ANY type of forced induction with very safe boost levels on a stock engine. 6-7 psi. Here's the stickler, you'll want more power after a while. 
ultimately you are ruled by your wallet.
1st gens with LS1 motor/drivetrain are the best of both worlds.
ultimately you are ruled by your wallet.
1st gens with LS1 motor/drivetrain are the best of both worlds.
