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

305 pump for 2.8L ?

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Old Dec 14, 2002 | 12:03 PM
  #1  
Randy82WS7's Avatar
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Joined: Mar 2002
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From: 62656
Car: 1991 S10 pickup 2700lbs
Engine: 4.3L Z TBI
Transmission: 700R4
Axle/Gears: 3.08 7.625"
305 pump for 2.8L ?

howcome an 88 2.8L fuel pump costs almost twice what a 305 pump costs, and could i just get an 88 305 pump and use that in the tank to feed the 2.8L ? ill keep trying searches

thanks for anything
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Old Dec 14, 2002 | 05:19 PM
  #2  
r90camarors's Avatar
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Joined: Dec 2001
Posts: 1,418
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From: Morris, IL
Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
Well, I'm not sure why there's the price difference. But to answer you question as to whether or not it would work, I would have to say it depends. Were you looking at a 305 TPI pump, or were you looking at a 305 TBI pump. If it was the TBI pump, then it's most likey not going to work. The fuel pressure you would need to feed your multi port is too high for the TBI pump. I'm pretty sure a TPI pump would work though, because it will support the fuel pressure needed.
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