C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Best Fuel Pressure Regulator?

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Old Mar 15, 2007 | 03:34 PM
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Default Best Fuel Pressure Regulator?

What's the best quality L98 adjustable fuel pressure regulator out there? The Holley unit didn't last that long for me.
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Old Mar 15, 2007 | 04:00 PM
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What happened to it?
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Old Mar 15, 2007 | 04:29 PM
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Just a bad diaphragm & I don't believe replacements are available.
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Old Mar 15, 2007 | 05:11 PM
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There was a recent post that they were available now. Was it ripped? When I got my Holly I cleaned up the drill hole for the vacuum fitting. It had typical sharp burrs from drilling. I have read that the Aeromotive unit is nice.
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Old Mar 15, 2007 | 05:13 PM
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I thought these could be used with stock diaphragms??
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Old Mar 15, 2007 | 08:24 PM
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I've had a TPIS one on my 86 for years and never had a problem.
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Old Mar 15, 2007 | 11:05 PM
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Aeromotive doesn't make regulators for TPI cars. I'll check out TPIS.
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Old Mar 15, 2007 | 11:07 PM
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I've been running a HyperTech AFPR for 6yrs and still doing fine...
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Old Mar 15, 2007 | 11:23 PM
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Last time I bought a TPIS unit it was just the top half with no diaphragm.
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Old Mar 16, 2007 | 12:00 AM
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Holley and it looks nice too, and also adjusting FP is easy too. And u get diaghpram, sping and whole unit for 89 bucks.
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Old Mar 16, 2007 | 08:36 AM
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Originally Posted by geezel
Just a bad diaphragm & I don't believe replacements are available.
I thought I read that someone did get "just the diaphragm"
I sent them an email.
I have the same reg and it would be nice to have a spare handy.
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Old Mar 16, 2007 | 09:14 AM
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Jeg's tells me no replacement diaphrams for the Holleys available.
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Old Mar 16, 2007 | 10:20 AM
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I asked this question before purchasing my AFPR and the majority seemed to like their Holley. So, I got one about 8 months ago and so far it hasn't let me down. I would also like to know if anyone knows where to get a spare diaphram.
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Old Mar 16, 2007 | 03:22 PM
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If Holley returns my email, I will post the results
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Old Mar 17, 2007 | 01:48 PM
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Street & Perfomance can get you a stgock diaphram!!

WWW.hotrodlane.cc
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Old Mar 17, 2007 | 08:13 PM
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Originally Posted by RRT vette
I would also like to know if anyone knows where to get a spare diaphram.
Me too!
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Old Mar 17, 2007 | 08:25 PM
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I just did a search on Google for Holley AFPR units and found the following:
Should you need information or parts assistance, please contact our Technical Service Department
at 1-270-781-9741, Monday through Friday, 7 a.m. to 5:00 p.m. Central Time. Please have the part number of the product you purchased when you call.

I will call them on Monday (I am retired ) and post what is learned from the phone call.
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Old Mar 20, 2007 | 12:58 PM
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I contacted Holley Customer Service today at 270-781-9741 and learned that a replacemet diaphram IS available for purchase. The diaphram does not have a part number and is considered a "special order" from the above number. The cost of the replacement diaphram is $15.00 plus a $5.00 shipping and handling charge. Hope this info is helpful to those who use and like the Holley 512-501 regulator.
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Old Mar 20, 2007 | 01:38 PM
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Thank you Sam Lam. I might go ahead and order a spare soon.
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Old Mar 20, 2007 | 03:16 PM
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Originally Posted by Sam Lam
I contacted Holley Customer Service today at 270-781-9741 and learned that a replacemet diaphram IS available for purchase. The diaphram does not have a part number and is considered a "special order" from the above number. The cost of the replacement diaphram is $15.00 plus a $5.00 shipping and handling charge. Hope this info is helpful to those who use and like the Holley 512-501 regulator.
They finally returned my email with "The diaphragm can be special ordered from tech service at 270-781-9741"
I will be getting a back up
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