TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

Sponsored by:

fuel presure ?

Reply Subscribe

Search this Thread

Old

Mar 24, 2005 | 12:21 PM

#1

Thread Starter

Member

Joined: Aug 2002

Posts: 475

Likes: 0

From: poughkeepsie,new york

Car: 1989 GTA

Engine: 350 TPI (Many Mods)

Transmission: 700R4

fuel presure ?

i have a L98 with AFPR at idle its set @40 with the vacum off 48 with the vacum on is this good or can i go higher? i have a bigger 155lph fuel pump also and many other mods.

Old

Mar 26, 2005 | 11:14 AM

#2

Moderator

Joined: Jan 2000

Posts: 19,655

Likes: 309

Thos pressures are just in spec, but it appears they are backward. Pressure should be higher with the vacuum line removed.

Stock specs are 37 PSIG and 44 PSIG, ± 3.

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Please Help! Fuel Pump Not Working

Glowsock

Tech / General Engine

13

Jul 24, 2025 03:15 PM

1992 Camaro at first barely runs, now doesnt at all

92camaroJoe

TBI

32

Jul 29, 2023 07:57 PM

Bad fuel pressure regulator AND leak in the tank?

mike_c

TPI

4

Aug 27, 2015 04:32 PM

Fuel pump for 1987 TPI EFI Trans Am to carburetor

beachrodder

Tech / General Engine

7

Aug 25, 2015 08:05 AM

1992 Camaro at first barely runs, now doesnt at all

92camaroJoe

Tech / General Engine

6

Aug 13, 2015 06:07 AM

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 06:31 AM.