So im uprgrading the fuel pump in my turbo b18 eg from a 255lph to the walbro 525 and was wondering when/if i need to upgrade the wiring or hardwire the fuel pump. Does the standard wiring suffice?

stock lines to filter
6an line to aem rail
stock return
goal is reliable 400whp with ability to go 600+ (Everything is overbuilt for if i decide i want more in the future)

 

I would go ahead and get it out of the way. It is cheap and easy to do.

30 or 40amp relay and harness pigtail from autozone

10ga wiring from the battery to number 30 on the relay
87 goes to power on the pump
86 goes to oem power wire to trigger the relay
85 is grounding the relay to the chassis

ground the fuel pump on the hanger. Not ran to the relay kit, nor the oem ground.

 

Agree - go ahead and upgrade the wiring. If you have more money than time, Burton Racing makes a nice pre-made harness for this upgrade.

 

Yup,a very clean and easy install. If you can ever catch them instock.lol they sell out quick.

 

Let me know I have the plug n play fuel pump harnesses in stock.

 

Thanks guys for the info, appreciate it.