can i install a mechanical feul pump on a 89 305
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Joined: Feb 2010
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From: Tuscaloosa, Alabama
Car: 83 t/a , 89 Formula
Engine: t/a-455 Olds, formula 305
Transmission: soon to be 4 speed, 700r4
Axle/Gears: 2.77, 3.23
can i install a mechanical feul pump on a 89 305
the car was TBI , i was wanting to put a mechanical feul pump on it but not sure if i can, is the 4 bolt plate on the passenger side where it would mount and if so, how? all pumps i found only had 2 bolt holes, any help will be great, thanks
Supreme Member
Joined: Sep 2002
Posts: 9,192
Likes: 20
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: can i install a mechanical feul pump on a 89 305
You can - but you'll have to remove the gas tank and take out the in-tank pump and replace with a carb pickup - the mechanical pump will not be able to pull fuel through the unused in-tank pump.
I'm assuming you've swapped to a carb, a mechanical won't produce the fuel pressure needed for any FI.
Why not just get the Mallory 4309 fuel pressure regulator and use the in-tank pump?
I'm assuming you've swapped to a carb, a mechanical won't produce the fuel pressure needed for any FI.
Why not just get the Mallory 4309 fuel pressure regulator and use the in-tank pump?
Joined: Mar 2000
Posts: 43,187
Likes: 46
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Then you need to hope that your cam has a fuel pump lobe on it. And hope that the block has the fuel pump push rod hole drilled.
It would be easier to use a return-style fuel pressure regulator like a Mallory 4309.
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theshackle
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Mar 5, 2017 06:37 PM
