TPI-carburetor swap, will this work?
Thread Starter
Junior Member
Joined: Jan 2010
Posts: 7
Likes: 0
From: Stockholm, Sweden
Car: -88 Trans Am GTA
Engine: 305TPI / 456hp 383cui
Transmission: T5 / T56
Axle/Gears: 3.45 9bolt
TPI-carburetor swap, will this work?
Im in a swap from efi to carb project.
Car is a 88 trans am gta (305/T5)
Car has a Walbro GS255 in tank fuelpump.
New engine is a built 4 bolt main 80-85 truck block.
Forged 383 crank, pro comp heads e.t.c..
Engine is tuned to 456bhp and will be assambled to a 96 T56 gearbox.
My question is will it work with stock fuel lines and Walbro in tank pump, and a regulator like a Mallory 4309 3 port 3-12 psi? Will fuel flow be ok to 450 hp?
Sorry for my bad english, im from Sweden
Car is a 88 trans am gta (305/T5)
Car has a Walbro GS255 in tank fuelpump.
New engine is a built 4 bolt main 80-85 truck block.
Forged 383 crank, pro comp heads e.t.c..
Engine is tuned to 456bhp and will be assambled to a 96 T56 gearbox.
My question is will it work with stock fuel lines and Walbro in tank pump, and a regulator like a Mallory 4309 3 port 3-12 psi? Will fuel flow be ok to 450 hp?
Sorry for my bad english, im from Sweden
Joined: Mar 2000
Posts: 43,187
Likes: 43
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
The stock lines are good to over 500 HP, so no problem.
(And, your English is better than a lot of Americans...
)
(And, your English is better than a lot of Americans...
) Thread Starter
Junior Member
Joined: Jan 2010
Posts: 7
Likes: 0
From: Stockholm, Sweden
Car: -88 Trans Am GTA
Engine: 305TPI / 456hp 383cui
Transmission: T5 / T56
Axle/Gears: 3.45 9bolt
Re: TPI-carburetor swap, will this work?
If it will work, i do not need to take my fuel tank down and replace the in tank pump and so on..i do not understand why not all efi - carb swappers use a bypass regulator?
Last edited by GTAStockholm; Apr 15, 2012 at 03:38 AM. Reason: spelling..
Joined: Mar 2000
Posts: 43,187
Likes: 43
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
The regulator will be fine. 4-6 psi is all you'll need.
Sounds like you're ready to go.
Sounds like you're ready to go.
Thread Starter
Junior Member
Joined: Jan 2010
Posts: 7
Likes: 0
From: Stockholm, Sweden
Car: -88 Trans Am GTA
Engine: 305TPI / 456hp 383cui
Transmission: T5 / T56
Axle/Gears: 3.45 9bolt
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