That is totally irrelevant to the 5.3L with a 70mm. A bigger turbo is going to make more power at lower boost levels. Bigger cubes and more compression also.

 

What the hell is wrong with you?

Read his POST, he is using a 5.3 with 243 heads. 37 more cubes and 6mm bigger turbo is not going to matter that much.

Please think it out before you post in response...

 

Stock heads/block 4.8L, Ls6 Cam, 5 speed, MP70 @ 10PSI



Same setup @ 15PSI

 

I believe the L33 also has higher compression, I think 9.5-1.

Foose, thank you for the dyno graph, Holly crap! Maybe I should scale back the boost. This set-up is going in a 2400lbs street car.

Newbee question still out there, do I match the WG & BOV with the same lbs spring or should one be slightly larger as a back up safety?

 

Nothing to have an emo attack over.

 

It's irratating when someone like yourself post in threads that has no relevant feedback to help "do-it-yourself" guys out.

Next time, just think about it before you post..

 

i think you will be able to do the 500.. i did 500rwhp and 550tq on my ls2 single turbo at 7.5 psi through a built 4l80e

 

How is my feedback irrelevant? I posted the results of a very similar setup I built. You shouldnt let a simple post affect you so emotionally. I'll watch what I say so people like you dont start cutting themselves. Sorry....end of this conversation and back to the subject.

cubic inch difference and a half a point of compression does make a difference. Comparing an LS2, bigger turbo....ect. irrelevant. Its like saying a car with a 400+ci w/ a 88mm makes 1000whp this should make 500 no prob. Dumb logic.

 

[QUOTE=foose04;14387017]Stock heads/block 4.8L, Ls6 Cam, 5 speed, MP70 @ 10PSI

Same setup @ 15PSI
QUOTE]

you ran 98mph in the eighth with 617hp to the wheel??? I dont think so

what did it mph in the quarter ?

 

Which part are you saying he is lying about, the mph or the whp? For those of us that have actually been down a dragstrip it looks pretty believable in a truck.

 

4650 race weight. Whats your question? If two different dyno's, timeslips, and video isn't enough, try this HP Calulator out.

http://www.wallaceracing.com/hpcalculatoreigth.php

Input 7.00@98, 4650 weight (base scale used here at Charleston AFB)

Save you some time
Your HP computed from your vehicle ET is 686.14 flywheel HP and 617.52 rear wheel HP.
Your HP computed from your vehicle MPH is 714.13 flywheel HP and 642.72 rear wheel HP.

Not bad for a damn calculator, nailed to the same HP the dyno said.

 

You did not post results, you posted what you thought. See below at your original post. GTFO brah, post real dyno information, nobody cares what you "guessed" your friends combo made, lol. What a tool.. Quit embarrasing yourself..

To your above statement on cubic inch, I can't even respond to the ignorance in that statement. So stupid. When you actually build a setup, drive it, dyno it, etc etc, then maybe your input with have relevance... next drive thru please.. BTW, Packers suck and the road stops Sunday for them..

 

One word sums you up perfectly. EMO.

 

Spring setting??

 

tial has recommendations on their website.

the wastegate setting and bov setting have nothing to do with each other.

 

I went to the Tial site, no dice. If I am going 10psi on the tial 38mm wastegate, how do I size the BOV? What do I buy?

Advise on this in very much appreciated.

 

No offense but i recall him having a similar setup a while back maybe you should know what your talking about before you go shooting off at the mouth lol......

https://ls1tech.com/forums/forced-in...3-transam.html

On a side note to the OP if your car doesnt make 500whp on your setup then there's something wrong......

Goodluck!

 

[QUOTE=71 chevy;14388136]I'm familiar with his setup, what's not believable? It's a heavy *** truck

I agree with you. He's had a similar setup in his Nova IIRC.

Quite a few dumb responses in here and people getting but hurt about nothing. It's not that hard to search and find your answer. 500rwhp should be obtainable.

 

[QUOTE=98Camarod;14391273]I did search, but still confussed! If it were you with 500rwhp goal running a MP70 on a 5.3 and a 38mm tial with a 10psi spring, what bov would you buy?

 

BOV spring pressure all depends on how much vacuum your motor is pulling at idle. Figure this out, narrow your decision on which valve to purchase, and find out if the supplied spring pressure is adequate for your idle vacuum. The Tial 50mm unit is a nice piece IMO.