supercharger on stock internals??

[blk-ws6]

Im looking at buying a gto with an ls1 motor in it, but its supercharged with stock internals... it made 474 rwhp and 514 rwtq. my question is, with stock internals is that safe? i know the block can handle the power but im not so sure about the internals.. thanks guys

[fastlt196]

it should be fine but i wouldnt expect 200,000 miles out of it

[M-Ten]

Yeah, it will be fine with those numbers. A lot of people feel uncomfortable going over 500 or 550 at the wheels with stock internals, but mainly it depends on the tune.

To be safe, though, I would upgrade internals if you're going over 550 - 600 RWHP.

[cailey37]

I believe the GTO's had the LS2 based motors....should be good to go with that HP....but, like someone said, I wouldn't expect it to last 200K.....and make sure they tuned the thing good.

[blk-ws6]

the 04 gtos had the ls1 motor.. 05 and 06 are ls2. and ya im aware of the tuning... its got a pretty conservative tune on it right now. thanks guys

[mghawk57]

How much boost?

[ntimid8r]

For stock internals you should keep the boost around 8 lbs. An LS1 will handle that pretty well.

[mghawk57]

I was wondering what blk-ws6 is running - I know from personal experiance that 8 is safe 12 is not safe.

[ntimid8r]

I know from personal experiance that 8 is safe 12 is not safe.

Sorry to hear that.

[mghawk57]

Live and learn - Just did not want anyone else to doubt that 8 is the limit

[ntimid8r]

Live and learn - Just did not want anyone else to doubt that 8 is the limit

I take it you have a forged motor now. Did you keep the same boost....12 or go higher?

[mghawk57]

Forged 402 stroker - AFR 72cc 225 heads - 233/244 609/609 - 12 psi - Yes I did - not running yet - and thats a whole story in itself

[ntimid8r]

Forged 402 stroker - AFR 72cc 225 heads - 233/244 609/609 - 12 psi - Yes I did - not running yet - and thats a whole story in itself

Wow, sounds like a killer motor. Love the heads....but that cam is huge! Lift and duration are steep.....I hope you have good springs and seat pressure for those.

I know things can get rough when building a motor. Best of luck to you and hopefully all goes well in the end.

[mghawk57]

I thought the same thing on the cam,but he was aware of the 95% street driven.You can only trust people with the information you give them - I guess -

[ntimid8r]

During my build I didn't know what cam to go with so I did some research. Not alot of posts from supercharged guys. I came across lingenfelters website and looked at their blower cam. It wasn't much more than a Z06 spec cam. I talked to them about it and they basically told me that with FI, you don't need the big lift and stuff like a n/a motor. Plus with me being in Cali.....I know a 224/224 sized cam is about max to go with and still pass emissions. So with all that considered, I went with the lingenfelter gt7 blower cam. The lift is only like 525 or something.....very mild and easy on the heads. Oh, I have gm cast 317 ported and polished heads. Don't flow as well as AFR but not too far behind.

[FantaZGuy28]

the 04 gtos had the ls1 motor.. 05 and 06 are ls2. and ya im aware of the tuning... its got a pretty conservative tune on it right now. thanks guys

If memory serves me correctly , the 04 GTO's have everything LS6 except the cam or something like that.

[rapter34]

I thought the same thing on the cam,but he was aware of the 95% street driven.You can only trust people with the information you give them - I guess -

a 402 will eat up that cam. it will sound fine now that cam in a stock cubed car. that would be crazy.

[qwkgto]

During my build I didn't know what cam to go with so I did some research. Not alot of posts from supercharged guys. I came across lingenfelters website and looked at their blower cam. It wasn't much more than a Z06 spec cam. I talked to them about it and they basically told me that with FI, you don't need the big lift and stuff like a n/a motor. Plus with me being in Cali.....I know a 224/224 sized cam is about max to go with and still pass emissions. So with all that considered, I went with the lingenfelter gt7 blower cam. The lift is only like 525 or something.....very mild and easy on the heads. Oh, I have gm cast 317 ported and polished heads. Don't flow as well as AFR but not too far behind.

you would be correct ,I have the stock ls2 in my 05 running 12 psi car ran 133mph in 1/4,before you guys say any thing,i realize not everyone has the same info,access and or can fab things or has easy access to a great tuner. stock cam also, been running it that way for past 2 years,most pople run 7-8 psi.the ls2 has 11to1 compression stock the ls1 has 10.5to 1 so why cant you run more boost?then again most guys would be happy with 6-8 psi.bottom line get a tune by someone who knows whats up the ls motors love boost with fi 11s are easily obatained on stock internals.

[LS2Tuner]

I can tell you in my hands on experience you can safely run 525-600 rwhp on stock short blocks for an extended time frame. . . . . . . . As in years.

You'll be fine the key is to have a GOOD TUNER as priorly stated. Most have to much timing/too hot of a plug. By the time they realize it's too late. It takes alot more than a wide-band and a dyno to be a "GOOD TUNER".