TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Fuel pump replacement questions.

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Old Sep 19, 2011 | 02:01 PM
  #1  
Mailbox Hunter's Avatar
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From: East
Car: 89 Camaro RS
Engine: 350 TBI
Transmission: 700R4
Axle/Gears: 10 bolt/ 3.23 Gear.
Fuel pump replacement questions.

Hey guys. Now that I have my engine build and swap done (thank god!) I got everything running smooth. It's a 350 tbi with an open air intake, Edelbrock performer intake, 65lbs/hr injectors, comp cam (don't know specs off hand), headman headers, flow master setup. I know the stock 305 fuel pump NEEDS to be swapped (yell at me for leaving it in for the last 700miles, I deserve it) but I have no idea what type of fuel pump will be good for my setup or even how long or hard it is to swap. Also note, I'm going to get a custom chip burned soon. (I'm running a 88 firebird ECM and PROM right now.)

So yeah, thanks.
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Old Sep 19, 2011 | 02:36 PM
  #2  
thomas1976's Avatar
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Joined: Jun 2006
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: Fuel pump replacement questions.

Best would probably be a stock TPI pump. Part # ACD#EP241

Stock TBI fuel pump, 65#/hr injetors @ around 12 psi (stock) supports around 230fwhp.

To support around 300fwhp with 65#/hr, requires around 20 psi of fuel pressure.

By using 18+ psi of fuel pressure, a VRFPR (vacuum referenced fuel pressure regulator) will be a must, otherwise it will run too rich at idle.

To set up for VRFPR fueling in the calibration (tune), requires to upgrade the ECM with the EBL of find a compatible computer that was used to control VRFP.
In my book EBL is the best way to go, plug and play, tune everything you whant http://dynamicefi.com/

Dyno symulator is also helpful to set up, tune the fueling and SA tables.
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Old Sep 19, 2011 | 06:04 PM
  #3  
UnderCover89TBI's Avatar
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From: Manteca,California. Nor Cal.
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Fuel pump replacement questions.

deffinately use a tpi pump dont use a walbro 255lph, and I would also recomend teh ac delco pumps
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