Thread: Trusted Walbro 255lph Seller

Got a used one from Swiss

While we are on the Walbro subject, what is the difference between the 3 pumps listed here?

the 255 HP is a high pressure walbro which requires that you use an adjustable FPR

if I remember right

So does this mean that I'm SOL until I get an Adjustable FPR now?

I used a HP with the stock FPR with no problems.

Yeah, you should run an adjustable FPR and you might run a little rich, but it won't cause any serious issues. My black car is running a Walbro on a stock FPR right now because the Nismo one messed up.

mine did too. Its stuck at 60 psi.

I've heard of people running rich without the adjustable FPR. Why not rock one?

He should get one, it's just he doesn't have one yet. I was saying it will be fine in the meantime.

There's no reason your fuel pressure should be higher, or you would run richer just by installing a Walbro 255 pump. If you do run a little rich, the ECU will eventually compensate for this and then you'll be fine. Using an adjustable FPR to control AFRs is unmanly.