Does fuel pump capacity (flow rate) need to match horse power (HP) in any way? Reason why I'm asking is because a technician at the company who makes swap engine/trans mounts said they can match their in-tank pumps with customer HP demands. However, I don't know if there's a "one size fits all" setup for a new LS3 engine (430 HP, 376 c.i.). I'm having the heads CNC'd at TSP along with double valves, trunion kit, and stage 2 cam, and running OEM fuel injection/coils.

Is there a specific pump flow rate you can recommend for my setup? Regarding the regulator, I am pretty sure regulators need a min of 55 psi for LS3 fuel injection, so that's not an issue. It's also best to place the regulator close to the engine, like on the chassis.

 

There's lots of calculators out there that you can use to see what kind of fueling you'll need for your combo. That said I'd just go with a Walbro 450 pump that should give you a bit of growing room in the future. And yes you'll want your regulator to be either on the rail itself or somewhere in the engine bay that's easily accessable

 

Thanks for the suggestion.