255lph Walbro fuel pump too much for stock B16?
 

I got a B16A and I need a new fuel pump. I'd rather get a 255lph pump so I won't have to upgrade again in the future, but I probably won't be going turbo for a while. Should I just get a 190lph or will getting a 255lph be ok (not rich or w/e)? Thanks

Re: 255lph Walbro fuel pump too much for stock B16? (SkoundrelUSA)
 

The problem that some people have with the 255 is the stock fuel pressure regulator cannot bleed off all of the extra pressure from the pump, so they end up running really rich.
Getting a good fpr(like AEM) will solve this problem, though.

Re: 255lph Walbro fuel pump too much for stock B16? (Slopoke)
 

Interesting....I'm leaning more towards the 190lph just to be safe. Will that pump enough fuel once i do turbo it?

Re: 255lph Walbro fuel pump too much for stock B16? (SkoundrelUSA)
 

I personally would stay stock til you go turbo and decide on what power and injector you plan to use.

Re: 255lph Walbro fuel pump too much for stock B16? (smart monkey)
 

Well the one I have right now is from a 94 Si (thats what the seller said) and I got a B16A. You think it is pumping enough?

Re: 255lph Walbro fuel pump too much for stock B16? (SkoundrelUSA)
 

if this a stock si one it is good enough for a stock motor or even turbo up to 300 whp using bigger injectors.

Re: 255lph Walbro fuel pump too much for stock B16? (smart monkey)
 

Thanks for the info. Anyone else know anything about this?

I recently upgraded to a replacement pump meant for Integra GSR on my Civic VX and I'm reading 50psi at idle on my fuel pressure gauge. I wanted to make sure my fuel pressure gauge was accurate so I hooked it up to my compressor and the readings were consistent. I'm installing a fuel regulator to get it back down to 42psi.

Not sure on the other models but the VX also has a smaller diameter return hose and hard line which also magnifies the effects of using a bigger pump.

Also tried drilling the return area on the fuel pressure regulator and got bad results. This was with a 1/16" bit though so unless you have something smaller, don't do it.

Re: (n1div)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by n1div &raquo;</TD></TR><TR><TD CLASS="quote">I recently upgraded to a replacement pump meant for Integra GSR on my Civic VX and I'm reading 50psi at idle on my fuel pressure gauge. I wanted to make sure my fuel pressure gauge was accurate so I hooked it up to my compressor and the readings were consistent. I'm installing a fuel regulator to get it back down to 42psi.

Not sure on the other models but the VX also has a smaller diameter return hose and hard line which also magnifies the effects of using a bigger pump.

Also tried drilling the return area on the fuel pressure regulator and got bad results. This was with a 1/16" bit though so unless you have something smaller, don't do it.</TD></TR></TABLE>

Um...so what are you saying? https://honda-tech.com/forums/images/smilies/emsad.gif

the walbro will work fine. It will build up a little extra pressure and make you run a little rich. If you get a B&M reg. or you use the stock FPR there is a pressure relief hole you can drill to remedy this problem. The "how-to" is on http://www.theoldone.com You are supposed to use a .035" drill bit or 1/32".

Re: (SkoundrelUSA)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkoundrelUSA &raquo;</TD></TR><TR><TD CLASS="quote">

Um...so what are you saying? https://honda-tech.com/forums/images/smilies/emsad.gif </TD></TR></TABLE>

So what I'm saying is you will need to get an adjustable fpr to lower the fuel pressure back down to 42psi if you are going to use the higher flow pump.

Also, it is a bit hard finding 1/32 drill bit, if you can't find one, definitely don't use a 1/16 based on my experience.

Re: (n1div)
 

Thanks for the clearer explanation https://honda-tech.com/forums/images/smilies/emthup.gif

im running a 255lph with a stock b16 FPR and i have a constant 38psi of fuel pressure. no probs here. i had a b&m fpr modifier, and it couldnt adjust my fuel pressure within stock specs (36psi - 42psi)