Whats the fuel pressure for MPFI?

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Apr 5, 2001 | 12:29 AM

Graeme'sFirebird

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From: First one out of liberty city, burn it to the ground

Whats the fuel pressure for MPFI?

im going to maybe get a fuel pressure gauge and isolator this weekend and mount it, but what pressure does mpfi require? Ive noticed most gauges are 0-15psi only so... ALSO..the little fuel pressure check port on the fuel rail, can i tap in there for my isolator with no damage? I dont see why not..

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1989 Firebird
2.8 v6, t5 swapped in

Ram Hi-po clutch, Cold Air, 1.6 rockers (ready to install), Lakewood LCA's, Lakewood Lift bars, 3" y-pipe, Random Tech Cat, 3" I-pipe, Flowmasters, MSd 6a, MSD Coil (Fireball in future) Accel 8.8 wires, MSD Ignition Module, 4th Gen Seats (not front yet)

" I'd rather run last in a full out race, than to NOT run at all ".

Apr 5, 2001 | 01:06 AM

v6camaroguy

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From: Sacramento, California, USA

I belive that your fuel pump should put out 40-50psi according to my camaro car repair manual. I don't know about the other question.

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88' CAMARO Sport Coupe
2.8L V6
K&N Air Filter w/RAM AIR
Flomaster

Apr 5, 2001 | 01:34 AM

FAST RS

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From: Moorpark

Car: 1991 CAMARO 1968 FIREBIRD

Engine: CAMARO 3.1L FIREBIRD 455

Transmission: CAMARO 700R4 FIREBIRD TH-400

i thoght our injectors put out like 15 or 16 lbs. i had a site a while back that had all the stats on the fuel ressure cant remeber the site tho

Apr 5, 2001 | 09:19 AM

Graeme'sFirebird

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From: First one out of liberty city, burn it to the ground

hmmm..then how could u possibly use the fuel pressure gauge..damnit. Now i need to see if i can find a 100 psi maybe

------------------
1989 Firebird
2.8 v6, t5 swapped in

Ram Hi-po clutch, Cold Air, 1.6 rockers (ready to install), Lakewood LCA's, Lakewood Lift bars, 3" y-pipe, Random Tech Cat, 3" I-pipe, Flowmasters, MSd 6a, MSD Coil (Fireball in future) Accel 8.8 wires, MSD Ignition Module, 4th Gen Seats (not front yet)

" I'd rather run last in a full out race, than to NOT run at all ".

Apr 5, 2001 | 09:42 AM

TomP

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Joined: Mar 2000

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From: Central NJ, USA

Car: 1986 Firebird

Engine: 2.8 V6

Transmission: 700R4

Stock pressure @ idle is around 40 PSI; dead-head pressure (max) is 60 PSI. Fuel pressure gauges are made specifically for fuel injected engines- but you guessed it, they cost more. You're right about the place to tap in for the gauge.

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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

Apr 5, 2001 | 12:35 PM

Firebird90

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From: Livermore, Ca. US

Car: Firebird SSA

Engine: 3.1

Transmission: 700R4

I've seen mine ~35 to 45 psi. I bought my fuel pressure gauge (Intellitronix)from Summit Racing. I just checked the site looks like they dont sell it any more. It cost me about ~$30.00 for the gauges and ~$15 for sending unit. Just want to point out. One injector may need ~15 psi but you need enought pressure for the other 5 injectors.