philsy

I am looking for a list that ref. pulley size no# to boost. I remove my nitrous system last week end and installed a Procharger P1SC-1 system on my 2003 vette LS1. the pulley on it now is 4.35 I dont know the amount of boost this will reach? ? also would like to find out other pulley sizes = what boost for further modding. also where do you guys buy different pulleys from? Thank for the help. I did a few searches but had no luck .

leojnknsC5

Boost depends on two things, all other things remaining unchanged. Impellor speed which relates to pulley size, and the other is air density or altitude. New Jersey is close to sea level so the air is dense/thick. If your motor is modded with cam, heads, exhaust, etc, that will change boost. I'd call ATI and see if the engineer can calculate your actual boost.

philsy

the motor is stock out side of exhaust headers , x-pipe.. just looking for something to referance to. before tuneing.

chris308

leojnknsC5

When you referrence to another motor, make sure you get the altitude the other car is running at.

BaneZ06

Motor size effects it too, a pulley making 15psi on a 346 wont make it on a 427.

philsy

where are you guys buying replacement pulleys from?
Bane are you running a supercharger?

BaneZ06

Yea an F1C on a 427 LSX, wish I could tell you how much boost its making but its not running yet so ill let you know.

philsy

Dude that thing looks sick best of luck with it.
Iam new to the whole FI thing. so trying to learn some,

Phil

eb02z06

I believe with a 4.25 you should see around 9-10 psi at 6500. Is this the Stage 1 or 2 Procharger kit?

philsy

not sure its twin intercoolers and the head unit says P1SC-1 it came with injectors 38 i belive. its the single large fan and the air filter is rectangle and part of the fan shrould.

eb02z06

Okay-that's the earliest kits. You can gain large by laying down the rad and getting a tube to draw air over the rad shroud into the blower. I'm not 100% sure but a bro here who goes by fixedroof I beleive modded the kit-you'll pick up large by doing this. Do a search bro and you should find all the info here!

madmatt9471

I don't know if this will help but I have :
TFS 215 Heads
224/228 581 588 114
Kooks Headers x-pipe hiflow cats
10.9:1 Compression as well

P1SC-1 with a 3.85" Pulley producing 7.6 PSI of B@@ST!

Remember cam, heads, headers etc all effect the boost you will make but you should get a decent idea if all chime in on their set-ups!

Thanks,Matt

madmatt9471

This is the same P1SC-1 with twin intercoolers that I have and I'm using 42 lb injectors, you should do the same and a BAP!

My motor is the stock '98 bottom end as I did not state that in my above post reply!

If you have any questions let me know!

Thanks,Matt

0FRCBobby

On the A&A kit I have on my 00 FRC I am at 11psi with a 3.85 pulley.

whitebullet7

i have the old ati p1sc-1 kit with twin intercooler
Stock 2001 Z ls6 motor
Kooks 1 7/8 headers system with 3'' back,stock ti exhaust
228/232 114 cam,Meth,4.10 pulley 7.3 psi 615/520 rwhp

MIKE-C5

My car with a 383, A&A D1SC with 3.61 Pulley on the Blower gets 13 Lbs. of Boost!

trussme

You May have a 4.38" pulley (uses a 90" belt) that came with the P1SC-1 Stage II Twin Intercooler system ....identical set up to mine (see sig)..since it is a stock LS1, you are probably set at 7 lbs. boost at 6200rpms, 38# injs @ 85% duty cycle...if it was tuned using the supplied Predator/Diablo hand held tuner package, that comes with it.

A 4.00" pulley, with 89.5" belt and 42# injs (and a good tune ) can give you "approx.10 lbs.of boost" with your stock LS1... as an example. Then, you gotta worry about fuel pressure , traction....and above all, "don't miss a gear!"

C5VERTMAN

4.50 7-8 4.25 8-9 4.00 9-10

vetterlatethannever

Wish I could tell you the boost on mine but the power falls off hard after 5k RPMS so I haven't been able to run it lately since swapping out the u/d pulley. I can say with an underdrive pulley and a 4.25 on the blower it made 4 lbs @ 6500 rpms.