My goal is modest, I would like to see 500hp at the wheels. What PSI do I need to run to see that number. BTW, all aluminum 5.3, 243 heads, LS9 injectors, dual 255 pumps, LS6 intake, 85mm TB, 2003 Z06 exhaust manifolds, small baby cam (212/216 on a 114 lsa if my memory serves right). All running through a 6 speed. Will 10psi get me there?

 

Yes it will

 

Man I don't think 10 psi will do it

 

Should do it no problem.

 

I think so, should run good.

 

Ok.... 2 yes, 1 no, and one maybe. That makes it much clearer.

Keep'em coming! Thx for the answers so far.

 

I would bet money that it will make 500 plus!

 

should as long as the clutch will hold it and get it to the rear...

 

the power it makes at 10psi of boost is dependent on how much it makes NA. how much do you think it makes NA? 360???

cos 350 * (24.7/14.7) = 588 flywheel

 

588 flywheel would be right at 500rwhp. He could go up 1-2lbs and hit his mark with ease.

 

a agree that 12 psi could get him to 500rwhp for sure.

 

332hp (according to GMparts warehouse)
40hp cam ??
10hp LS6 intake
10hp cat deletes
5hp better flow Z06 exhaust manifolds
5hp PS delete

So long story short, even though the numbers above are higher, I would say 370-375 crank would be close.

 

Personally I think you will be in the low to mid 600's bhp and 520-530rwhp.

 

I think it would be close, 10psi im going to guess 450-475whp. My friends 5.3 w/ a MP70 on it , stock 99 LS1 cam, 317 heads, stock LS1 intake, custom headers, 6-speed, I was guessing 550whp on 15psi on 93 octane.
We switched it over to E85 and then the new RAM powergrip HD couldnt hold it after that.

But I was tuning it and we started off at 5psi, then 10, and then 15. It was quite a noticeable difference going from 10 to 15psi.

 

To a degree that is true but its all about the variables. I had a 252 Cubic inch six cyl that made about 290 HP...in NA trim

It made about 1400 HP with about 20 pounds of boost...GT4788 will do that.

Its really about cfm of air the device will put out......that dictates the power

 

As long as everything is fabbed properly and effecient, yes it will no doubt.

Here's my dyno runs with my old LQ4 with stock 317 heads, mild cam with a mpt76 turbo custom front mount...

6speed, 4.10's, 10 Bolt, 28x13.5 Tires, Spec 3+ Clutch

9psi - 565rwhp/556rwtq
15psi - 786rwhp / 7xxrwtq (don't have dyno sheet)

I was TOLD by the new owner of my SS..

20psi - 866rwhp ??? I havent confirmed that yet tho.

 

Not to hijack the thread but if a PT-88 will make that much HP with a 290 CID motor wonder what a would a F1-A pullied at 8-12 psi do on a stock 5.3L?

 

Well, you are talking about 2 totally different platforms. I can guarantee you that little 6 cylinder is not making 1100hp at 6k rpm like our ls motors. More like 8000/8500rpm. Spin them puppies hard to make that much power. just my .02.....

BTW, no offense to the guy that posted that, but I doubt it made that kind of power on 20psi, maybe 30+.

 

with all due respect, this is absolutely impossible

 

So 10psi will get me in the ballpark or maybe better. So newbee question.... I purchased a tial WG with a 10lbs spring. What spring should I get for the BOV?