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Check valve in line with the FPR?

Old 09-04-2004, 04:25 PM
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Default Check valve in line with the FPR?

I've have a few people tell that you should get an aftermarket FPR if you are using Uberdata. They say that the stock press. reg. won't live very long if it is exposed to boost on a regular basis (12 psi) Anybody know if putting a check valve in with it is a good idea, bad idea? I was going to try it, but not if someone says it's a bad idea...
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Old 09-04-2004, 04:51 PM
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Default Re:Check valve in line with the FPR?

I have Uberdata and an aftermarket FPR is not needed.
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Old 09-04-2004, 07:18 PM
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Default Re:Check valve in line with the FPR?

Originally Posted by Zeusfire69
I've have a few people tell that you should get an aftermarket FPR if you are using Uberdata. They say that the stock press. reg. won't live very long if it is exposed to boost on a regular basis (12 psi) Anybody know if putting a check valve in with it is a good idea, bad idea? I was going to try it, but not if someone says it's a bad idea...
whoever told you that obviously has no idea how a 1:1 FPR works. its designed to keep the pressure at the tip of the injector at a constant pressure in relation to the manifold pressure. so at 20" of vaccum with a system that is supposed to hold 45psi the fuel line pressure will be 35psi and at 12psi of boost the pressure will be 57.
Boost will not hurt your stock fpr but you will need to upgrade to an adjustable one (like the el cheapo B&M) if you put in dsm injectors or injectors that need a different fuel pressure than the stock honda injectors. Or really its not needed but a good thing to have
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Old 09-04-2004, 08:31 PM
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Default Re:Check valve in line with the FPR?

^^^ werd

Rockin' the stock regulator is fine.
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Old 09-04-2004, 10:01 PM
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Default Re:Check valve in line with the FPR?

Thank you for the quick answer! That tells me exactly what I needed to know...I have a walbro 255 and I NEVER go lean at all, I'm not tuned yet so I really am rich all the time...so far that is...
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Old 09-14-2004, 03:47 PM
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Default Re:Check valve in line with the FPR?

Do not run a 255lph intank pump with a stock FPR, it simply cant return enough fuel for the increased flow the pumps throwing at it. This creates a bottle neck and causes a pressure increase in the rail.

I had the same problem in my car and couldnt turn the fuel pressure at idle below 50psi. I decided to do it the right way, and do a custom setup (now with a GE fuel rail) with an AEM 1:1 fuel regulator so as to not have problems with fuel supply to the 740's and mid-450hp motor im running.

Heres a pic of it



Its an easy mod... just drill the end of your fuel rail, tap it, get some AN line/fittings, tap the hole thats left from the stock FPR to 1/8" NPT and plug it, and replace the stock fuel return hose and its good to go

Hope that gives some insight!
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Old 09-14-2004, 04:34 PM
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Default Re:Check valve in line with the FPR?

Do not run a 255lph intank pump with a stock FPR, it simply cant return enough fuel for the increased flow the pumps throwing at it. This creates a bottle neck and causes a pressure increase in the rail.

I had the same problem in my car and couldnt turn the fuel pressure at idle below 50psi. I decided to do it the right way, and do a custom setup (now with a GE fuel rail) with an AEM 1:1 fuel regulator so as to not have problems with fuel supply to the 740's and mid-450hp motor im running.
so did i but in the long run who cares... id just lean it out and not worry about it, if you have a walbro 255 that is
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