Ryanbgb22

I currently have a Racetronix 250lph pump running on stock wiring on the stock fuel system.

I am upgrading injectors and increasing boost. Can I add a 450lph pump to the bucket with the 250, or will the 250 be fighting against the 450 too much?

Also, at what point do I have to worry about over heating fuel? Can I just run a relay next to the tank and have the stock fuel pump power feed kick the relay on and off for both of the pumps?

JoeNova

Yes, you can put them in the bucket and Y them together. They won't be fighting each other unless one is pushing more pressure than the other is capable of.

Ryanbgb22

Thanks.

For wiring, will I be ok running both pumps off of a single relay that is triggered by the stock fuel pump power? I am using a totally stock returnless system with 80lb injectors.

I don't plan on doing any super long road trips with the car, but wondering if I'll start overheating the fuel.

Lonnies Performance

iTrader: (16)

The stock fuel setup cannot properly control the volume of both pumps. You will very high idle pressures & potentially damage the pumps.

Either you have way more pump than you need or you also need to upgrade the rest of your fuel system. The stock fuel system typically works well up to approx. 700rwhp. If you have less HP than this just use twin 255's.