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- - stock fuel pressure? (https://www.thirdgen.org/forums/tpi/440600-stock-fuel-pressure.html)

91chevyz28

09-16-2007 04:07 PM

stock fuel pressure?

does anyone know what the stock fuel pressure is with the hose off?

Burnout91

09-16-2007 07:35 PM

Re: stock fuel pressure?

43.5 PSI, I think.
Bill

91chevyz28

09-16-2007 07:50 PM

Re: stock fuel pressure?

thanks!

Andy 91GTA

09-17-2007 11:47 PM

Re: stock fuel pressure?

44 psi on my 305 TPI auto 91 GTA. It varies from year to year though.

SLP_GTA

10-03-2007 06:15 PM

Re: stock fuel pressure?

what is the PSI connected

Eightyninef

10-23-2007 12:34 AM

Re: stock fuel pressure?

This is important. my 1989 LB9 is 47 psi no vacuum. 38 idle with vac.
maybe GM went to 47 because my car has the dual cats ???

I know there are a few different GM part #'s for FPR's/

Fast355

10-23-2007 12:47 AM

Re: stock fuel pressure?

Quote:

Originally Posted by Larry Burd (Post 3506989)

This is important. my 1989 LB9 is 47 psi no vacuum. 38 idle with vac.
maybe GM went to 47 because my car has the dual cats ???

I know there are a few different GM part #'s for FPR's/

My setup was from a 1986 Peanut cammed 305 Automatic. 46PSI with the line disconnected and 38 psi with my normal idle vacuum of 18 in/hg applied.

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