Walbro 255 Non High Pressure

slowbubblecar · 02-09-2004

Is there much of a difference in the walbro 255hp and non-hp? I want a fuel pump that flows well but I don't want to buy a fuel pressure regulator. I don't plan on going huge on boost and don't think I would adjust the FPR. I was thinking of getting a 255 non hp. Would that be fine with a stock 2g FPR or would a 1g FPR be an upgrade if it fits?
Thanks
James

**Shane@DBPerformance** · 02-09-2004

The 255 non-hp will have all the same fuel overrun problems of the 255HP without the added benefit of more fuel flow at high boost levels.

**JET** · 02-10-2004

If you don't want an AFPR, try and scrounge up a Denso 190 and rewire it. You could always get the Walbro 190 too.

Jakey · 02-10-2004

Sorry for the off-topic, but what is the advantage of the Walbro over the Denso?

**JET** · 02-10-2004

It is the other way around, Denso is better than Walbro except for price. They are quieter and more reliable.

CVD · 02-10-2004

Even a 190 can overrun the stock FPR after a while. I had an un-rewired Walbro 190 start overrunning my stock FPR after having it for about a year.

2G FPR's might be better?

slowbubblecar · 02-12-2004

What happens when you overrun your fuel pressure regulator? Would you just run more base fuel pressure?

Could I go walbro 255 high pressure, get a bm regulator and turn the fuel pressure up? Higher fuel pressure would let me lean out the injector signal signal more. See any problems with this?

Setup is currently boost gauge, mbc, upper ic pipe w/ blitz bov, supra mkiv ic, and SAFC. I am wiating to put on my 14b and plan on getting 550's. Will the added fuel pressure be too much for this setup?

slowbubblecar · 02-12-2004

anybody know?

**Shane@DBPerformance** · 02-12-2004

Quote:

Originally posted by ghettostyle@Feb 12 2004, 01:00 PM
Could I go walbro 255 high pressure, get a bm regulator and turn the fuel pressure up? Higher fuel pressure would let me lean out the injector signal signal more. See any problems with this?

You can do that.

The problem of overruning the FPR makes it so that it can't ever run low pressure. So at conditions when your at high vacuum like idle and light cruising, you run a little too rich.