firehawk68mcleod

iTrader: (2)

JUst like the title says . How much boost will my d1sc procharger make with a 7" crank pulley and a 3.4 head unit pulley give or take. I know there are a lot of factors. But just a round number for the intjector estimate. The set up is a ls2, 232/240 .595/.608 115 lsa cam and ported 317 heads thanks for any help

MadIceV8

iTrader: (12)

I would venture around ~10 lbs.

M2W-GTO

10? I would guess quite a bit more. There are dudes running 10-11 lbs on 4.25/4.0 pulleys.

xFLG KING PIN

It would be more then 10 psi...it would make even to lay waste to some stuff....

35thsscamaro02

54343 blower rpm with 7" crank and 3.4 pulley based on 6600 engine rpm boost = ?

What my car sees 47520 blower rpm 7.65" crank and 4.25 blower pulley based on 6600 engine rpm I see boost 11lbs 347ci ls1 h/c

Hope this helps

LS1RedZ

iTrader: (19)

I've got a 3.4 pulley and 7.65 pulley and Im only seeing 11-12 psi

35thsscamaro02

Yea but what size motor? Has to be big cubic inch or your seeing lotsa boost leak or belt slip!!! You making like 800+ hp?

ICRAZY6

iTrader: (68)

What J-bracket are you using? I'll be running a 3.55" pulley with a 7.65" crank pulley. Curious how much belt slip your experiencing?

I8UR4RD

iTrader: (16)

wtf? is this in like a 408 or are you running a 6 rib with a spaghetti noodle of a belt? If i did not make at least 14-15 id be PIZZT

LS1RedZ

iTrader: (19)

I have a built 370, nothing "big" and I have asters bracket system. It's prolly something simple that I'm not seeing yet. It doesn't pull past 5500 so I know something's up.

Stumped1215

iTrader: (9)

Boost on a procharger is linear so you have to make a pull to your max rpm to see your max blower speed=max boost.

blue00ZZleeper

iTrader: (5)

He's been having a small problem for a little while now. We were all trying to help and iron it out. When I had my D1 combo I had a 7.25" SDCE crank pulley with a 3.70 blower and was seeing 11psi or so. You should see more then that on your combo...I'd guess around 15psi.

The Alchemist

iTrader: (19)

With a 4.00" blower pulley and 7.65" crank with Aster's setup, truck intake hat and filter with a 3" fmic setup I was seeing 15psi at 6800.

BLNLS1/RX7

iTrader: (2)

About 12lbs.

Bob@BruteSpeed

iTrader: (16)

I'd go with Siemens 80lb injectors. Bob

zackyv55146

I know this is old but its exactly what ive been looking for I have the p1sc1 on my ls1 with the 3.4 pulley and im omly gettin about 3psi at 6000ft and procharger told me to upgrade my crank pulley what size should i go to and what psi would i be looking at its a stock bottom ls just a few bolt ons`

Bob@BruteSpeed

iTrader: (16)

http://shop.brutespeed.com/ATI-1GJ11...-1GJ115-08.htm

You're going to need top upgrade to the eight rib kit, shown in the above link. It has a 7.65 crank pulley. I would go with the eight rib 3.40 blower pulley. You are going to need the 918853 harmonic balancer and I would go with the crank pinning kit. You should see approx 6-7 psi with the change, it will make a huge difference in power. Bob

zackyv55146

[QUOTE=Bob@BruteSpeed;17231288]http://shop.brutespeed.com/ATI-1GJ11...-1GJ115-08.htm

Alright cool so I wouldn't really see much of a difference if I upgraded the crank pulley with the 6 rib kit?

Bob@BruteSpeed

iTrader: (16)

[QUOTE=zackyv55146;17231684]You would if you could find one. ProCharger doesn't make one, there have been aftermarket companies that have in the past. I bought one back in 2002 which make a big difference in boost with my D-1SC. It took it from 7 psi to 15 psi, and was made by SSM I believe. You may find one of these used, but no one makes them anymore. Bob

zackyv55146

[QUOTE=Bob@BruteSpeed;17231694][QUOTE=zackyv55146;17231684]
Alright should I look for a 7.65 for the 6 rib to? Or a different size