TXPO

I hope someone will help me out. I have a 2001 LS1 (LS6 intake) from a Trans Am 84K miles. Will be going into a 73 Firebird. Plan is for a street/strip that can daily drive and may add a supercharger later. Looking to get in the 500HP range. I'm a wrench turner and need help with what I need to get.
Cam and springs: something upper middle between stock and super hot.
Heads: what do I need done to mine?
Pistons, crank, rods: stock ok our upgrade to?
Intake: stock with larger throttle body or FAST?
Thanks for any help. Last time I worked on cars a 3 Duce was the in thing.

00SlvrSS

Okay. First thing. Is this at the flywheel or the crank? Flywheel it can be done. But trust. Its going to take a heavy parts list to get you in the ballpark. With a 346ci that is. Now a 6.0 or up would be so much easier with less money along with being a lot more street tolerable and friendly.

A.R. Shale Targa

iTrader: (2)

You should have 241 casting heads and I would send those to Advanced Inductions for a CNC program. You can check Phil's website for before and after flow numbers. Id leave the shortblock together and stock. While adding what most would consider a baby cam however it would be very street able and work well with boost later
The Lingenfelter GT2-3 or the Brian Tooley stage 1 with his valve Springs and pushrods

TXPO

Thanks AR. What advice on the intake? Bigger throttle body or whole intake?

HCI2000SS

iTrader: (2)

Unless you have some extra money to burn I'd just leave the intake alone....maybe have your TB ported if you like

JoeNova

500 HP before or after the supercharger?

TXPO

I think I got some bad info. I was told I could get 500 before supercharger without breaking the bank.

JoeNova

At the flywheel, yes. You'll need ~425whp with a 6-speed to make 500 flywheel. Somewhere around 375-400whp with an auto, depending on trans/converter.

Find an LS1 setup using a trans similar to yours, and see what it took them to hit the power level you'll need.

Mercier

iTrader: (15)

It occurs to me that the only tall order here is making 500 N/A with a 5.7 AND being truly boost-friendly later. It's not impossible, but seems like one might be left having to really limit the effectiveness of the supercharger later.

Me, I would just swallow the fact that when I wanted boost "later" I would sell the (high compression?)N/A heads and put something on with less compression.

Just to use round numbers to illustrate my thoughts, it occurs to me like this:

500 N/A and can add a little boost to get to 600 before detonation and such.
400-450 N/A now and can add more boost later and possible make 650-700 with the supercharger.

TXPO

I think you've nailed it. So what do I need to get there? BTW I have a built 4L60 E going behind it. Thanks again to everyone for helping and not making fun of me.

JoeNova

Honestly, I would just pick a decent boost cam and maybe a $200 set of ebay long tubes and grab a tune. $1200 in and you'll pick up ~50-75 HP. If you want to add a supercharger later, you can go fairly large on the boost cam without killing power with the supercharger.

Mercier

iTrader: (15)

That sounds like a good plan. If you wanted a little more in NA form, you could pick up some 243 or 799(stock on LS6, LS2, later trucks) heads and add another 20-30HP to that. 243s are like cash..pay $350 or so for a set and you can always get that back out of them if you don't beat them up too bad. They flow the best of the stock cathedral-port heads and bump compression up a little. Stock heads on a LS1 can make a lot of power though.