Vacuum pump experts inside....

Reply Subscribe

Thread Tools

Search this Thread

Jul 30, 2010 | 08:36 AM

nysbadmk8

Thread Starter

TECH Enthusiast

Joined: Apr 2002

Posts: 537

Likes: 2

From: Lehighton Pa

Vacuum pump experts inside....

I have a GZ motorsports kit installed on my stroked Ls2 based motor in my C5, I set it up for about 12 inches and on the high end its pulling down 8 in from 5k to redline...

My problem is.. Its pulling down my oil pressure.. 2-3 psi at idle 5 psi at 2-3k and 10 psi over 5k

Anybody else have this issue?

The fix?

Jul 30, 2010 | 08:07 PM

nysbadmk8

Thread Starter

TECH Enthusiast

Joined: Apr 2002

Posts: 537

Likes: 2

From: Lehighton Pa

Wow No one?

Jul 30, 2010 | 08:43 PM

1994z

TECH Regular

iTrader: (48)

Joined: Apr 2006

Posts: 442

Likes: 2

From: empire,alabama

somebody will chime in eventually. just be careful if its pulling oil pressure down that much, you know its pulling it away from the wrist pins, you know what happens next

Aug 1, 2010 | 01:39 PM

JPH

TECH Junkie

iTrader: (2)

Joined: Jan 2006

Posts: 3,776

Likes: 0

From: Fort Wayne, IN

I would not run over 11" myself, and was the clearances in the motor setup to run a vaccum pump?

Aug 1, 2010 | 02:27 PM

garygnu

TECH Senior Member

Joined: Feb 2009

Posts: 5,445

Likes: 4

never break a engine in with a vacuum pump,after a few good pulls hook it up.is there any oil in the catch can?moroso makes a adjustable breather valve for vacuum pumps.like others have stated don't run too much vacuum ,you risk starving parts of oil.

Aug 2, 2010 | 03:55 AM

S2VYSS

Launching!

Joined: Mar 2009

Posts: 281

Likes: 0

From: Melbourne, Australia

Sorry to steal the thread but is there any major gains from running a vacuum pump on a street engine? I have been thinking about it for awhile and thought I would ask

Aug 2, 2010 | 12:39 PM

JPH

TECH Junkie

iTrader: (2)

Joined: Jan 2006

Posts: 3,776

Likes: 0

From: Fort Wayne, IN

Quote:

Originally Posted by S2VYSS

Sorry to steal the thread but is there any major gains from running a vacuum pump on a street engine? I have been thinking about it for awhile and thought I would ask

You probably wouldn't even see a difference on the street imo.