High fuel pressure on stock fpr
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High fuel pressure on stock fpr
Okay so I’m seeing about 80-90 psi at the rail with a stock fpr. What could cause this?
i have a walboro 450 hardwired to the battery, 2200cc injectors, and an AEM fuel rail.
i have a walboro 450 hardwired to the battery, 2200cc injectors, and an AEM fuel rail.
Honda-Tech Member
Joined: May 2008
Posts: 1,892
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From: Southern Oregon
Re: High fuel pressure on stock fpr
Your walbro 450 has too much flow for a stock fpr. You need to run an after market fpr for that pump, I recommend an off rail regulator like aeromotive or equivalent.
Thread Starter
Honda-Tech Member
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Re: High fuel pressure on stock fpr
i have an AEM one but I was trying to figure out that issue.. guess I’ll just throw on my that one then. Thanks!
Honda-Tech Member
Joined: May 2008
Posts: 1,892
Likes: 1
From: Southern Oregon
Re: High fuel pressure on stock fpr
The aem regulator come with 3 different size internal fittings. You probably want to use the largest one with that pump. I wasn’t able to run more then 45psi base pressure with my walbro 450 and aem regulator without the pressure jumping around like crazy, so I switched to an off rail regulator and have no problem running 65psi base pressure now.
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