thailam5

Hi guys. I have a 1999 Trans Am and I wanted to get some input from you guys of what you would do if you wanted over 400 HP to the wheels. Here is my dyno sheet and tell me what you think. It has a full 3" catback exhaust from Kooks Custom Headers along with American Racing stainless steel headers and an SLP Intake Lid that does not fit properly. I have a 00-02 Lid. All of this work was done before I bought my car. Please reply. I have a low budget since I am in school. But all of the work will be done by myself. Thanks

senicalj4579

iTrader: (41)

Same thing as any ls1. Heads and cam. Do a search and you will find endless info on this same subject. GL

Gunslinger09

I would add a good cam, Ls6 intake and tune and you should get there.

Sladester2

iTrader: (1)

pretty high numbers for those minimal mods. Look at a 228 duration cam or higher and any decent set of heads will get you the numbers you are looking for

Greed4Speed

iTrader: (7)

Budget? I'd do suspension mods and good soft tires to harness the power you have now. Add a converter if you have an auto. None of it will help with power. A converter will actually cost you power, but they will help the car to run quicker.

badassracing

iTrader: (13)

Depends what your budget is but cam would be the first thing I'd change.

gMAG

iTrader: (1)

Should be close. A decent (used) head upgrade will put you over.

Streaty383

If you have the tools tsp can supply you with a bullet proof 383 stroker assembly for about 3.5 k, add a cam and just have the standard heads machined with a tune and that ended with 460 rwhp for me

HCI2000SS

iTrader: (2)

What is the budget? You could just slap on a 75 shot for really cheap, and easily be there

RJDio

Oh man, if you can do work yourself then install cam and port the 241 heads (upgrade rocker arms and push rod parts as the budget allows), port TB and get a SLP MAF and install a LS6 intake and a cheap BBK underdrive pulley. If you know how to tune, that is great but you'd probably want someone to dyno tune it since you'd want to know the rwhp anyway - that isn't cheap (by my standards) unless you can get a deal somewhere. That would put you over 400rwhp on a budget, I know because I'm' there now

Sales@Tick

iTrader: (3)

A good cam-only set-up will make 400rwhp+ all day long with your simple modifications.

Depending on how you want it to run and drive, idle quality, and where you want your power to be made will determine the cam that needs to be used with your set-up.

Mazzenger

iTrader: (5)

The right cam and springs should get you 400+hp.

prokilllsx

I agree. Cam only should get you there. More details about your car would help though.

blackbird0230

I hit 400rwhp on cam only. Go with the torquer v2 and it'll get you there, if not damn close.

HCI2000SS

iTrader: (2)

Depends on the dyno man! I have the Torquer 2 with TSP 5.3 heads, long tubes, etc... and only made 405 rwhp on a certain dynojet here in MI. It made 460 rwhp on another dyno so go figure lol. Point is don't count on a certain number from a dyno as they can vary so damn much

gMAG

iTrader: (1)

If you want 50+hp cam only increase, I might check out the specs of those cams, first, and consider whether you'll want to drive the car that way, full time.
I don't want to go against those who have more experience than me, but I prefer an engine with components that match better....like the LS6 intake, or heads that flow more.
Also, if you've got stock injectors (26.3), you should be well over your 80% duty cycle @ 400rwhp...yes?

blackbird0230

Good point on dyno but I've always stuck to one dyno so that works for me. I can see what mods gained what power, my cam gained me 42 hp on my dyno and it's a tad smaller than the tv2.

Op if you want 400+ hp get heads cam intake and you won't have to worry about just grazing past 400hp.

Also injectors are a must, my cam makes my injector duty cycle sit at 85% no bueno for adding more powa

thailam5

Thanks for the input. Would you guys recommend a LS6 intake manifold or a FAST 92mm Intake? This is the first time I am going to be doing performance. Normally my father and I rebuild cars to factory, but I know now that performance things are a whole different story. Thank you for the help

HCI2000SS

iTrader: (2)

If you can afford it then do the Fast intake definitely, but the LS6 intake is a great budget intake too IMO

Sales@Tick

iTrader: (3)

I would save the money you'd spend on a Fast 92mm and have your stock heads ported by AI or TEA. You will see a MUCH larger return on your dollar by doing this than going with the Fast intake.

I only recommend the Fast intake for guys that want to make over 460rwhp and already have H/C or are going to be installing H/C and want higher than 460rwhp. It's not needed unless you're wanting to squeeze every last ounce of power out of the set-up. They also don't add any RPM to the operating range contrary to popular belief as the runner length is nearly identical to a stock intake.