fpr - Honda Prelude Forum

Wraith · 03-03-2004, 01:41 PM

You may all think I'm dumb now but I had my B&M fpr installed for me cause I've had some recent health problems. Since I didn't install it myself, I'm not sure how to adjust it. I don't want to go back to the shop cause I'll get charged to have it adjusted. Does anyone have one that can walk me through it or got instructions on how?

NXLude · 03-03-2004, 06:07 PM

If its like any other one in the world you will have to unscrew the single bolt on the top and turn the screw to the right to raise it. I dont recommend adjusting the fpr unless you A) have the appropriate guage (I can sell you one cheap if you need it) and B) have some reason to do it in the first place. With a bolt on setup you dont need to change it, our cars run rich out of the box. It should be used in conjunction with a VAFC or other device to precisely change the fuel curve

SK Honda 7 · 03-05-2004, 02:42 AM

NX LUDE.... did you get your header yet?

From what i heard i dont think the FPR is really needed with VAFC. Cause i spoke to a few people on here and they said even though i'm running crower stage 2 cams i still dont need FPR since the stock fuel system can handle the job.

any idea if thats correct?

cause i'm going to tune it within a few days so i need to know if i should buy an FPR along with anything else?

Joon525 · 03-05-2004, 04:24 AM

As NXLude said you need a gauge to properly tune it (as well as a fitting to mount it). The fitting may be hard to find. I took the gauge adapter fitting that is mentioned in the Helm and re-tapped it to fit the threads on my fuel pressure gauge. Using this allowed me to mount my gauge (Marshall liquid filled) on my stock fuel rail. I can get a picture if you need one.

NXLude · 03-05-2004, 08:09 AM

Well, I personally think that currently there isnt enough information related to tuning crower cams to definatively say what the exact fuel requirements will be. You can try it.....tune it with just the vafc on stock fuel pressure, see how hard jour injectors are running in the long run. If the car pushes enough fuel on stock gear then I guess you dont need it. Its a test that needs to be done. I think its a close call either way. The only place it may run a little lean is at the peak of your power.

And no Im not suppesed to get the header till next week, I will be throwing a party if I actually get it someday.....

SK Honda 7 · 03-05-2004, 10:44 AM

Well i'm gonna tune my car now. Its still relativly cool outside in North East. So i figure if i get a good a/f ratio, come summer time i can still use it as well since if it will run a bit rich now then in hot summer days it will just about right.

If i were to get a FPR what else woould i need to get to get the gauge mounted. How much is the whole thing.

Wraith · 03-05-2004, 11:48 AM

If you buy the B&M you'll get the fpr and guage for under $100. The AEM is over $100 for the fpr alone and another $100 or so for the gauge. My gauge is mounted after the fuel filter.The guy who installed my fpr turned up the pressure so it's running way too rich. It's even hard to start unless it's already hot cause of it. I'm getting a VFAC but I'm not going to install it until my warranty runs out. I'll dial my fuel pressure up at that point.

Wraith · 03-05-2004, 12:03 PM

Oh, Thanks NXlude.

SK Honda 7 · 03-05-2004, 12:16 PM

so we can mount the GAUGE for the fuel pressure after the stock Fuel filter?

is that it? or am i getting something confused

Joon525 · 03-05-2004, 12:26 PM

Quote:

Originally posted by SK Honda 7
so we can mount the GAUGE for the fuel pressure after the stock Fuel filter?

Yes you can. Mine is on my fuel rail on top of the nut that connects it to the fuel filter. I wasn't going to bother with pictures since Wraith said he already had it but if I remember I guess I'll look to see if I have a picture of it.

SK Honda 7 · 03-05-2004, 12:37 PM

Joon you think B&M is a good FPR and the gauge they make. Cause i'm suppose to go tune my cams this week and i dont wanna waste time going there without having the ability to bump fuel.

NXLude · 03-05-2004, 02:09 PM

Most fpr can handle the simple task of raising the pressure a few lbs. The B&M unit works fine.....

SK Honda 7 · 03-06-2004, 11:15 AM

So you think B&M is good quality?

If so does it bolt up to our stock parts or do i have to get additional things.

Where can i pick one up for a good price?

EDIT: i looked on line... but they dont have any that fits PRELUDE only civic's and NSX's anyone know a part number or anything.

NXLude · 03-07-2004, 02:47 PM

If you want my recommendation for a fpr, Id say go with weapon R, Ive had mine for 3 years and it works fine. The thing I like about it is that it already has a fuel pressure guage right on it so its pretty convenient. Just a thought.....

SK Honda 7 · 03-07-2004, 03:05 PM

how much is it and where can i get it. I really dont want to spend crazy money on it. hance i thought of going for B&M

Joon525 · 03-07-2004, 05:38 PM

The B&M listed for Civics and Integras will work on the Prelude just fine. For installation, follow the instructions in this link. It doesn't matter that it's the instructions for a B series, it's the same damn thing for the H series.

Keep in mind that if you use it and you ever want to go back to stock you have to buy a new fuel pressure regulator since the B&M modifies your stock unit. What I did was buy a used regulator (really cheap) from someone and I cut that one up. I think the H23 and H22 use the same regulator. It almost doesn't matter anyway since they both get cut up and the B&M spring gets used instead.

Some people don't like the B&M and rather have something like an Aeromotive but so far mine (as well as a few other's) is fine. As for B&M's fuel pressure gauge, some people don't like it and have had it fail on them but there's a bunch of people who use it without any problems.

An alternative is a liquid filled gauge such as the Marshall gauge or Autolink gauge (search and you'll find places to buy them). An advantage of the liquid filled gauge is that when you're trying to get a reading while the engine is on, the liquid will hold the needle more steady. I think this is more of a problem if you have the gauge mounted on the fuel rail as the engine vibrates more than the chassis (if you mounted it on top of your fuel filter it's obviously not mounted onto the engine).

You CAN mount a gauge on the fuel filter but reading it will just be a tiny bit harder (as well as the installation) since it's further down inside the engine bay. If you do mount it on the top of the fuel filter you can use the hardware that came with the B&M gauge. If you want to mount it on the fuel rail you're going to have to either:

Find a fitting that will make it work. (I couldn't find one ANYWHERE.)
Do what I mentioned in my first post in this thread and get the one mentioned in the Helm and then drill it out and retap it to fit the threads on the back of the gauge. (The Marshall and B&M gauge both have the same thread size.)

Here's my B&M installed with the Marshall liquid filled gauge.

The installation is easy as hell. The hardest thing for me was finding someone to retap the fitting that I got from Honda (I don't have a tap and die set) but I got my mom's technician at her work to do it for me for free.

Now do you NEED all this? I'll leave it up to you. But my thinking was this. I'm getting my cams, cam gears and V-AFC tuned down in Virginia, there is no way that I'm going to drive down there twice just because I found out that I couldn't add fuel with the V-AFC alone the first time. Plus I'd have to pay for dyno time twice.

SK Honda 7 · 03-07-2004, 09:18 PM

JOON i wish you were my best friend.

Thanks a lot.

I'm not following what fitting you talking abut from honda to mount it on the fuel rail. And what exectly needs to be retapped? Any links to it or better info. how much is the fitting?

I think i might go with what you did. this seem by far the best and cleanest install and the one that works.

Basically i'm in the same situation as you. I got cams and going to be tuning them and i dont feel like doing it twice. So i might as well buy the parts now and hope that they will get used.

SK Honda 7 · 03-08-2004, 09:58 PM

joon i still need ya buddy.... not sure what the fitting is and where it goes..