EFIDynoTuning Forum

My 02 mustang currently has a cobra hat in a stock gt tank with the basket broken out. I recently came upon a deal on a cobra tank with a division x return style hat and wiring kit with dual walbro 465 pumps.

I'm wondering if I'll be better off to purchase the rest of the things needed and fully swap to a return style fuel system or buy new returnless pumps and the fittings required to hook it into the stock fuel system.

While I currently have no plans on going over 650whp in the future, I know that's been something I've told myself before and once I got to the level I wanted I ended up wanting more.

I wasn't sure if there's pros or cons to going either way as it seems like those who have gone return style love it and wouldn't go back and those who build high who returnless systems wouldn't change theirs either.

I converted to returnless with a hobbs switch to activate the second pump It reduces fuel heat build up. My car with just a single 340 would boil the fuel in a couple hours of driving. Returnless stops that from happening. I would suggest going returnless and trigger the second pump using a hobbs switch.

I prefer returnless but it makes no difference.

Your fuel pumps for now should be sufficient.