Sorry for adding another post to this thread but i have a problem... Installed the BHR Pump which is brilliant! But i still have a minor problem, When the fuel gets to less than half (say between half and quarter) at high revs she kind of starves and stops on the power at 6k? Any ideas?

 

Now i didn't notice this until i already put my pump back in but i installed a walbro and didn't melt down the pop off cap, however i couldnt even wedge anything between it to get it to pop open. I'm not planning on boosting it in fact I'm pretty sure I'm trading it in on a 350z in the next two weeks, should it be something to worry about?

 

yes .. your popoff will popoff and then where will you be ?

 

Yeah, a 350Z after an RX-8 is a real worry.

 

So i have read through this entire thread and have gone back and read through parts of it again and i have one question.
Does the pop off valve that you melt prevent the integral fuel pressure regulator from operating correctly? After you do the mod will you still have a properly functioning pressure regulator ensuring about 60 psi to the rails?
My friend was telling me that if i run an upgraded fuel pump i will run more rich. I'm concerned with this since my car is NA and will be for probably a year or longer, but my fuel pump is bad now
Sorry if i've missed something...just want to make sure i understand correctly.

 

The siphon has no real effect on the regulator...so you will be OK

At some point I suppose the flow from the pump could theoreticall overpower the siphon/ regulator discharge...but it doesn't do it at the flow levels from any pump in the 350l or less area

 

Thanks for the reply dannobre!
So do you guys have more fuel pressure when you run the walbro, will this cause my car to run rich and be less economical as it is my daily driver right now.

 

The pump doesnt change the regulated pressure...

 

Thanks for confirming dannobre! I'm going with the BHR and the Walbro, hopefully i get a good one!

 

First off, sorry for posting this question in this thread........

I recently replace my OEM pump with a BHR sourced 255 Walbro. During installation it was obvious that the stock fuel pump O-ring was too thick and wouldn't fit with the new pump. Having missed the fact that you need to use a thinner O-ring with the 255, I just installed the pump without an O-ring. The 255 Walbro from BHR did not come with a thinner O-ring either. Any idea what issues can come of not using an O-ring? Do I need to take it back apart and add a thinner O-ring? The pump installation happened about three weeks ago and I have had no issues daily driving it, but I have not had a track event since the new pump.

Since I missed the fact that a thinner O-ring was needed, would it be beneficial if the first post mentioned this thinner O-ring?

Thanks in advance for the help.

 

Hey JCrane82
I don't know if it means anything but i installed my BHR sourced 255 Walboro with stock pump O-ring and it pooped out after 5 days? Charles is awesome and is sending me another pump.
Maybe that is my problem??? I don't know. Anybody have any ideas whether we should get a thinner o-ring, use no o-ring or use the stock o-ring??

 

I went to my local hardware store and got a thinner O-ring, been fine ever sense

 

When I did my install it was 9 PM at night, so I was not able to run to a local hardware store and get a thinner O-ring. Looking at the design of the system, it appears that the O-ring's purpose is to control the pump's movement. When I installed the pump without O-ring, there was little movement possible, but I am unsure if the pump will maintain a seal with the sock filter over time. The O-ring does not appear to be a seal of any kind, since the pumps inlet is at the bottom and seals to the sock filter. Thoughts?

 

I used te stock oring and that was several months ago. Probably 4 months or so and it runs like a champ!!

 

Installed the Walboro 255 for the second time. Kept the oem fuel gasket. The fuel element as well as the sock looked good. Fingers crossed for a good pump and no issues.
Can i suspect my fuel economy to suffer with the walboro 255 compared to stock?

 

I have also installed the walbro recently and noticed no changes in fuel economy, the fuel pressure regulator will keep things in check

 

Anyone running aermotive on s1 units?

@ flick 46.... So now rue running on s2 pumps since u said ure on denso now

 

My fuel mileage is worse, I think due to maybe running more lean and not knowing it. I was getting 22mpg or better on the highway and now the best I can get is 19 maybe 20 if im lucky.

 

Would you says it's comparable to those other units? I understand if you can't answer that publicly.

 

yea, i was the unlucky ones....


Check ur email soon, will be needing some midpipe and maybe another pump

 

about as false as all those failed pumps ....

 

I had two factory pumps fail (under warranty) then put my own Walbro in, which was 'weak' at high revs/acceleration. Gave a hesitation which was cured by an Aeromotive 340.

 

my oem is starving on left hand turn even with a full tank!

gotta find a solution...tired of that crap.

Aeromotive?

new OEM assembly?

serie 2 pump assembly?

2 pump?

what way should i go?

 

Mine died at the track, only option was what Advance Auto could get the next day. Full assembly was $200, went right in, got half a track day, no issues.

And, if I even suspect it is failing, I have the factory assembly to put a good pump in and play with.

 

^I'm running the Aeromotive 340 also, it's been running great for my set up.

I'm usually boosting anywhere from 12-16psi.
Got about 5k miles on the aeromotive so far, highly recommend it!!