9 psi on a stock pulley...video

**gotboost3** · 07-16-2009

in my previous thread i said i pushed 9 psi at the top ends of the rpms on a 3.8 stock pulley...here's the vid

**Liquifire** · 07-16-2009

do you have the u-bend to v-bend backpressure upgrade?

Does it feel like it is pulling hard?

**gotboost3** · 07-16-2009

yeah it pulls pretty hard for being un tuned....i have headers that go into a 3 inch straight downpipe...no u-bend

**blueguy** · 07-16-2009

Am I cross-eyed or did it touch 10?

**gotboost3** · 07-16-2009

it almost touches ten about 9.5

**silverstreak** · 07-16-2009

Originally Posted by gotboost3

it almost touches ten about 9.5

Thats not good on a stock pulley. You better get some rockers or cam when you throw that 3.4 on or knock..knock. Maybe its just a freak lol Doesnt seem like its flowing to well

**blueguy** · 07-16-2009

Originally Posted by silverstreak

Thats not good on a stock pulley. You better get some rockers or cam when you throw that 3.4 on or knock..knock. Maybe its just a freak lol Doesnt seem like its flowing to well

He has headers...and a FWI...it flows just fine

**QwikGT** · 07-16-2009

its boost stacking. this isnt a twin screw blower, its a roots...you want as much air flowing as possible. rockers or a cam are needed in this situation before the piston breaks off some chips like a bag of lays. the 3800 wants less boost with smaller pulley!!! hope this helps

**blowfishRus6** · 07-16-2009

stock heads cant flow crazy amounts of air. i could see it happening close to redline. rockers might be a good investment.

**FoSHO99** · 07-16-2009

Weak... lol kidding.

I wouldn't worry too much about boost levels on a roots blower unless your degrees of knock is the same as your boost level.

**FoSHO99** · 07-16-2009

Originally Posted by blowfishRus6

stock heads cant flow crazy amounts of air. i could see it happening close to redline. rockers might be a good investment.

Correction: Stock heads HAVE flowed some crazy amounts of air before just fine.

**silverstreak** · 07-16-2009

Originally Posted by bluegtp91

He has headers...and a FWI...it flows just fine

Oh he has headers, well that changes everything. lol

**blowfishRus6** · 07-16-2009

yea i ment to retype that when i did it, stock heads combined with stock cam.

up top it dont seem like it can keep up with flow. i dont hit max boost till 5k plus also.

**gotboost3** · 07-16-2009

so am i ok im not knocking at all the kr is being scanned right above the boost gauge i dont get any kr until i get to about 80 and then i knock which should disapate with a tune.....so is this bad or no? im not knocking at all on that pull you just watched....is it a factory freak?

**gotboost3** · 07-16-2009

couldnt i just heighten my BBV to bleed a lil more before shifts...?

**gotboost3** · 07-16-2009

seems kinda iffy that stock heads with headers cant flow the boost produced by a 3.8 pulley.....if stock heads cant flow these small numbers thats weak sauce lol and as the psi goes up i feel a lil more pull.....so isnt the boost going to good use then?

**silverstreak** · 07-17-2009

Originally Posted by gotboost3

seems kinda iffy that stock heads with headers cant flow the boost produced by a 3.8 pulley.....if stock heads cant flow these small numbers thats weak sauce lol and as the psi goes up i feel a lil more pull.....so isnt the boost going to good use then?

If your not knocking when you put the 3.4 on then boost away brother. 9.5 on a stock pulley just seems like alot especially since you have headers but if you have no KR then who cares.