Fuel Line size

[DodgeFreak]

I have access to -6 to -12 hyd. hose. Question is can the hose be to big??? I'm wanting to run this on ve and maybe later on to p-pump.

[AHineman]

I can't see any reason to run bigger than -8.

[BC847]

If you plan on running a bypass type regulator, you might consider running a minimum of 6AN for the supply, with a 8AN return. The pressure regulator will work MUCH better (unloading) with a return that's larger than its supply.

I run a 6AN supply from the tank, to the Walbro lift-pump (at the tank), to the Aeromotive bypass regulator, and finally to the IP.
Sitting just beside the power steering pump, is a manifold that has a 4AN line from the IP return, a 4AN line from the injector return, and a 6AN line from the regulator bypass port. The manifold has a 8AN line running back to the fuel cooler, and then back to the tank.

With running a 6AN return (everything tee'd together at the engine) back to the tank, I had issues with the Aeromotive regulator spitting fuel from its case O-ring with getting off the throttle quick after a WOT run.

[DodgeFreak]

. The pressure regulator will work MUCH better (unloading) with a return that's larger than its supply.

If I run a -8 supply do I need to run a -12 return or would -8 suffice?? I'm assuming once you step up to the bigger lines the size doesn't matter as much since it will probably flow more than what the reg can put out of the return.

[BC847]

It seems I've read many run 8AN for both supply and return successfully, but I wouldn't know if they had problems similar to what I did.

[DodgeFreak]

Thanks, I'll run 8 for both and cut some 12 just incase lol.