i have one of those b and m type fpr's which you cut off half the stock regulator and use the b and m on top. when i adjust it....its still stuck at 50 psi. what is normal fuel pressure for a b18b? i was thinking somewhere around 42-46 psi. should i find a stock fpr? would that help any or is there something wrong with the b and m?

this is my set up-
b18b
drag 3
12:1 fmu
b and m fpr
walboro high pressure intank pump

 

Who did the cut on the stock FPR ? Was it done properly ? If the pintle in the FPR was nicked or bent, it will not allow the FPR to function properly with or w/o the B&M on top.

Does your pressure change with the vac hose on AND off/pinched ?

X2

 

I would say that because you are using the high flow pump the stock regulator cannot let enough fuel go back to the tank. I believe if you drill a hole in the fuel pressure regulator or buy an AEM regulator this problem will go away. also I bet if you put the stock pump back in you will be able to adjust you fuel pressure. the hole drilling method is listed on endyn's webpage. I think it is called the TOO relief method. hope this helps

 

i had the same thing. although i have a boosted sohc, i was also running the b&m and the walbro high pressure but i had rc 310s. the thing with the b&m is that it doesnt allow you to turn down pressure. drilling the bottom of the stock piece works, but then you have to prime your car a buncha times everytime u start up. i didnt like doin it so i just swapped in an aem.

 

http://www.theoldone.com/articles/regulator/

If you're having trouble finding that drill bit (.035"), the closest I could find was a 1/32" bit made by Dremel, which is .03125". I switched to an AEM adjustable FPR because I got Hondata. Like others have mentioned, you sometimes have to prime the pump a couple of times before it will start, but other than that it ran fine.

 

thats a really small drill bit. i dont even know were i can find one that small. i might just switch back to the stock one and save up for a aem or sx. thanks for your help guys

 

Most places that have Dremel tools will sell the 1/32" drill bits. You will also need the collets to go along with it. Wal Mart, Lowes, Home Depot, etc. sell it. If you don't have a Dremel, just buy it from a big store which has a good return policy, carefully use the stuff and return it. It will be obvious that you opened the cardboard Dremel box because it's glued shut, but Wal Mart won't care. The drill bits and collets come in little sealed plastic packages that are on hooks in the store. If you use a very small screwdriver in the section where the hook opening is in the plastic, it's possible to take both the collets and drill bit capsule out without cutting the plastic packaging. The wrench that comes with the Dremel kit is in a plastic bag and also doesn't need to be removed, just use it inside the bag to tighten. Drill the FPR, then return everything. Wal Mart doesn't give a ****. When you return it, just say you were unaware that the Dremel was so large and that you changed your mind. It's kind of sneaky, but it's not stealing! Good luck on your mission.

 

would it be bad if he was just stuck at 50psi ? as in more prone to leaning out, detonation, etc. or would it be okay, just a waste of gas.

 

damn ur an evil beaver

 

?

 

thats a good idea....i was thinking the samething. i guess my next trip will be to walmart.

does anyone know if i drill the hole on the fpr. will i be able to adjust the fuel pressure since it will be relieved?

 

what is the normal fuel pressure for a b18b anyway?

at 50 psi...i can see a pretty big difference in my gas mileage

 

You'll run too rich at idle and will foul the catalytic converter.

 

damn, just today my car is doing the same thing. I can adjust it back to 42 psi at idle. If I did that, I can boost agai right?? God damn b&m


[Modified by 96b18c1vic(T), 8:37 PM 3/27/2003]

 

It's not the B&M, it's the stock Honda FPR that doesn't allow you to lower the pressure beyond a certain point, only increase it unless you drill.

 

i drilled it.....thanks

it went back down to 40 psi

 

make sure your FMU isnt installed backwards. I had mine installed backwards and it did the same thing. reversed the fuel lines on the fmu and shot back down to normal

 

thanks for the help guys.....i just got a aem fpr

the endyn crap doesnt work

 

LOL, that sucks! What happened?

 

Walbro pumps can sometimes keep the fuel psi higher than stock.
i've used a couple Walbro pumps so far and both keep the fuel psi at 48-52, whether it's a stock FPR or the B&M FPR. stock is normally 38/43. 48-50 psi isn't really a bad thing for most setups, but it can consume more fuel than actually needed so that the gas mileage sucks.

i guess the drill thing works to widen the orfice, though i've never tried it myself.

 

does this problem affect the operation of the fuel delivery? or is it just a visual problem?