What's a good place to start with the fuel pressure!
Thread Starter
Supreme Member
Joined: Dec 2000
Posts: 1,536
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From: Springfield, MO, USA
Car: 1986 Trans Am, 1991 Firebird
Engine: 355 TPI, 3.1L V6
Transmission: 700R4 in both
What's a good place to start with the fuel pressure!
Ok, here's what I got.... 355, 24# LT1 Fuel Injectors, Adjustable Fuel Pressure regulator, and I'm using the stock 305 computer chip (temp situation). What would be a good fuel pressure to start with using this computer/injector combination?? Thanks in advance. 
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1986 Trans AM
305 TPI
Well over 200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Current Project: upgrade to a 355 TPI, 6" rods, 9.7:1 Compression, Stock TPI ported, 24#/hr LTI injectors (cleaned and flowmatched by Cruizin Performance), Hedman Shorty Headers, 3" exhaust with 80 series flowmaster, SBC 993 heads completely redone and modified for 1.6 RR, Comp Cams XE262-14 TPI Cam, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Ignition, Hypertech hot coil.
------------------
1986 Trans AM
305 TPI
Well over 200,000+ miles (speedo/odometer non-funtional! Odometer reads 142,000)
4 Wheel Discs
9 bolt Borg Warner Rear (2.77's....oh joy) :P
Completely Stock
Current Project: upgrade to a 355 TPI, 6" rods, 9.7:1 Compression, Stock TPI ported, 24#/hr LTI injectors (cleaned and flowmatched by Cruizin Performance), Hedman Shorty Headers, 3" exhaust with 80 series flowmaster, SBC 993 heads completely redone and modified for 1.6 RR, Comp Cams XE262-14 TPI Cam, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Ignition, Hypertech hot coil.
Supreme Member
Joined: Oct 2001
Posts: 1,392
Likes: 4
From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
<font face="Verdana, Arial" size="2">Originally posted by 86TpiTransAm:
Ok, here's what I got.... 355, 24# LT1 Fuel Injectors, Adjustable Fuel Pressure regulator, and I'm using the stock 305 computer chip (temp situation). What would be a good fuel pressure to start with using this computer/injector combination?? Thanks in advance.
</font>
Ok, here's what I got.... 355, 24# LT1 Fuel Injectors, Adjustable Fuel Pressure regulator, and I'm using the stock 305 computer chip (temp situation). What would be a good fuel pressure to start with using this computer/injector combination?? Thanks in advance.
</font>
Supreme Member
Joined: Sep 1999
Posts: 3,197
Likes: 10
From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
well, you're grossly overrich running a MAF car w/ a 19 lb injector chip w/ 24 lb injectors. Unless you have a holley regulator you can't get the FP low enough to make up for it.
My recomendation, as low as possible until you get a properly set-up chip in it.
My recomendation, as low as possible until you get a properly set-up chip in it.
Thread Starter
Supreme Member
Joined: Dec 2000
Posts: 1,536
Likes: 0
From: Springfield, MO, USA
Car: 1986 Trans Am, 1991 Firebird
Engine: 355 TPI, 3.1L V6
Transmission: 700R4 in both
<font face="Verdana, Arial" size="2">Originally posted by Ed Maher:
well, you're grossly overrich running a MAF car w/ a 19 lb injector chip w/ 24 lb injectors. Unless you have a holley regulator you can't get the FP low enough to make up for it.
My recomendation, as low as possible until you get a properly set-up chip in it.</font>
well, you're grossly overrich running a MAF car w/ a 19 lb injector chip w/ 24 lb injectors. Unless you have a holley regulator you can't get the FP low enough to make up for it.
My recomendation, as low as possible until you get a properly set-up chip in it.</font>
Funny you say that.... I have a Holley Fuel Pressure Regulator. The lowest it goes is 30psi. So you think I should go there huh?? I'll have to give that a shot.
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