Fuel Pressure for a 383ci

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Feb 18, 2003 | 07:15 PM

Vette#4

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Joined: Oct 2002

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From: Ft Myers FL

Fuel Pressure for a 383ci

Hi all...

Anyone running a 383ci have advice on where the fuel pressure
should be at idle...I've got #24 lb injectors w/superram intake
and a TPIS level 5 chip...but my idle is constantly hunting/sputtering...
have a new IAC motor in and the TPS is set to spec..52mm tb w/ no
apparent air leaks...Any suggestions greatly appreciated
:cheers:

Feb 18, 2003 | 07:32 PM

88-406

Burning Brakes

Joined: Oct 2001

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From: Tracy California

St. Jude Donor '05

Re: Fuel Pressure for a 383ci (Vette#4)

That's kind of a trick question, it's probally not going to be as much as you may think. Could be anthing from 38-48psi. My car likes 45ish +/- a few psi.

KM

Feb 19, 2003 | 04:08 PM

black_89_vette

Melting Slicks

Joined: Nov 2000

Posts: 2,469

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From: Winchester Ontario

Re: Fuel Pressure for a 383ci (88-406)

Mine likes about 48-50 psi . I have a 383 with 30 # injectors.

Feb 19, 2003 | 05:42 PM

yoslambo1@cs.com

Safety Car

Joined: Sep 2001

Posts: 4,095

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From: modland CT

Re: Fuel Pressure for a 383ci (Vette#4)

im running 9psi.....but i have a carb! :jester

Feb 19, 2003 | 05:51 PM

CorvetteZ51Racer

Drifting

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From: Houston TX

Re: Fuel Pressure for a 383ci (Vette#4)

Quote:

Your best bet here is going to be to talk to TPIS and see what fuel pressure and injector size the chip thinks is in the motor. Hopefully their program assumes the #24 injectors you have and it's a simple adjustment on the regulator. However, if the chip is thinking you have #30s, you'll need to crank it up some more.

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