C5 w/Built LS3 Performance Fuel Pump Options
Thread Starter
7th Gear
Joined: Jul 2022
Posts: 7
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C5 w/Built LS3 Performance Fuel Pump Options
Pic of the car for attention.
I have a '99 C5, full race, with a swapped LS3 stroked to 417ci. NA, fuel injected, making about 700bhp before tuning.
The fueling required for this power level vastly exceeds the stock fuel pump's 190lph. According to my calcs, I think I need about 300lph at my system's 58 psi.
Searching the forums, others have had trouble trying to adapt some fuel pumps, with the stock canister no longer working and fuel starvation issues from a sub-optimal pickup, and having to hack up the stock canister to incorporate the aftermarket pumps.
I see multiple outlets such as TPS Motorsports offer this Aeromotive 340 as compatible with a 99 Vette.
https://www.tpsmotorsports.com/test2...l-pump-gm.html
However, Aeromotive themselves list it as only compatible with Corvettes up to 1992.
https://aeromotiveinc.com/wp-content...Guide_2018.pdf
Another product that looks like a possibility is the Walbro 400:
https://walbrofuelpumps.com/400lph-w...fuel-pump.html
Has anyone dropped one of these Aeromotives or Walbros into a pre-2003.5+ C5 successfully?
Last edited by DocHawk; May 18, 2023 at 07:40 PM.
Instructor
Joined: Sep 2008
Posts: 155
Likes: 33
From: Plano TX
I do not have direct experience because my car is 04. I had a custom system for my twin turbo. You can contact, e.g.
http://www.lonniesperformance.com/vettefuelsys.htm
http://www.lonniesperformance.com/vettefuelsys.htm
Thread Starter
7th Gear
Joined: Jul 2022
Posts: 7
Likes: 0
Thread Starter
7th Gear
Joined: Jul 2022
Posts: 7
Likes: 0
I've decided to build my own return setup, as follows:
Walbro F90000262 400LPH fuel pump retrofitted into the stock fuel pump bucket
Stock 3/8" fuel supply line repurposed into return line from fuel rail
-8AN (1/2") supply line
30 micron fuel filter replacing stock filter/regulator
Holley Sniper EFI 850013 Fuel Rail Kit
Holley Terminator 522-768X 76lph injectors
Fuel pressure regulator at the far end of the fuel rails set to 58psi
Fuel relay wiring harness to ensure no voltage drop at higher amp draw for new pump.
I'll let you know how it goes!
Walbro F90000262 400LPH fuel pump retrofitted into the stock fuel pump bucket
Stock 3/8" fuel supply line repurposed into return line from fuel rail
-8AN (1/2") supply line
30 micron fuel filter replacing stock filter/regulator
Holley Sniper EFI 850013 Fuel Rail Kit
Holley Terminator 522-768X 76lph injectors
Fuel pressure regulator at the far end of the fuel rails set to 58psi
Fuel relay wiring harness to ensure no voltage drop at higher amp draw for new pump.
I'll let you know how it goes!
