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

Holley Adjustable Fuel Injection Regulator

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Old Sep 2, 2002 | 12:13 AM
  #1  
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Default Holley Adjustable Fuel Injection Regulator

I'm moving to 24lb injectors and need a adjustable fuel regulator. Is this a good part before I order it?
http://store.summitracing.com/partdetail.asp?part=21811
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Old Sep 2, 2002 | 12:40 AM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I ordered one about 4 months ago. Put it on the car and it would not maintain the pressure. It adjusted so much, you could shut off the fuel completely.

The maintaining of pressure problem consisted of:
I would set pressure at WOT (45lbs) and then the pressure at idle was tooo low. I could not find a happy medium and threw it away. :mad
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Old Sep 2, 2002 | 12:55 AM
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Default Re: Holley Adjustable Fuel Injection Regulator (85vet)

So what is the best one out there?
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Old Sep 2, 2002 | 12:56 AM
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I was about to say Holley IS the best one out there. Honestly that is the first time I've heard of one not working well.
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Old Sep 2, 2002 | 02:28 AM
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Default Re: (scorp508)

Have run a *@#&tload of them on two different TPI cars, and hands down, the Holley was the best.
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Old Sep 2, 2002 | 08:49 AM
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Default Re: (scorp508)

Maybe this one was defective. I will probably go ahead and get this one.
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Old Sep 2, 2002 | 11:48 AM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

That one is the best one iI have seen so far. Stay away from a BBK they are junk. :yesnod:
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Old Sep 2, 2002 | 01:04 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I bought the Holley and after comparing the parts to a stock regulator I decided not to use it. The srping that it comes with looks and feels very wimpy compared to that stock piece and the plunger assembly is not tapered like the stock piece to fit in the regulator housing. Holley claims they do not make one for the Corvette although I know many on the forum are using them.

I bought the TPIS billet unit. Have not installed it yet, but much like several others, it uses the stock internals and just replaces the cap.
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Old Sep 2, 2002 | 01:15 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (1MoorTym)

Looks like TPIS makes one for the 92-96 LT1 engines, but not one for the L98. Anyone got any other suggestions?
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Old Sep 2, 2002 | 01:51 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

Looks like TPIS makes one for the 92-96 LT1 engines, but not one for the L98. Anyone got any other suggestions?
TPIS makes an AFPR for the L98, part # 100-002, $89.
I am running a TPIS AFPR on my LT1 and it works great.
Also, you need a fuel pressure guage to tune the AFPR.


[Modified by STL94LT1, 5:53 PM 9/2/2002]
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Old Sep 2, 2002 | 01:59 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I'm using a T.P.I.S on my '86 Vette and it works fine. :)
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Old Sep 2, 2002 | 01:59 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (STL94LT1)

TPIS makes an AFPR for the L98, part # 100-002, $89.[Modified by STL94LT1, 5:53 PM 9/2/2002]
Thats the part. Their older catalogs did not list it for 85-91 vettes because the printer screwed it up. The new 2003 catalog has it listed properly.
It also comes with the gaskets and security torx bit to install.
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Old Sep 2, 2002 | 06:43 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (1MoorTym)

Should I get it from TPIS, or somewhere else. Jegs has it, but for the same prices as TPIS. Also, where should I get the guage to measure it? I want one that doesn't stay on the car. TIA
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Old Sep 2, 2002 | 06:57 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (Mr. Magoo)

I'm using a T.P.I.S on my '86 Vette and it works fine. :)
Ditto.. :cheers:
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Old Sep 2, 2002 | 07:13 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (MrNuke)

What pressure are you guys running at?
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Old Sep 2, 2002 | 09:21 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I ended up buying the fuel regulator from Lingenfelter. Theirs included new innards and I did not have to use my old one. Their price was only $71.

Check it out:
http://www.lingenfelter.com/lingenfe...=17&pf%5Fid=69
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Old Sep 2, 2002 | 09:57 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I have mine set at 40=42psi Idle, 48-50psi WOT..
Only 2 turns from the lowest possible setting.
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Old Sep 2, 2002 | 09:59 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (MrNuke)

I have mine set at 40=42psi Idle, 48-50psi WOT..
Only 2 turns from the lowest possible setting.
Are there two settings on the adjustable fuel regulator? Never seen or used one.
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Old Sep 2, 2002 | 10:29 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (VetteWave)

I just picked up FMS 24# and the Holley AFPR last week, so I should know how it'll do tomorrow after I finish polishing one of my runners. But from a topic I posted (and a few others) the Holley seems to be the best AFPR, and you don't need a wrench to adjust.
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Old Sep 2, 2002 | 10:48 PM
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Default Re: Holley Adjustable Fuel Injection Regulator (87Beast)

Can you make your own regulator??? Welding a nut on the cap
and using a allen screw to adjust up or down on the pressure.
Maybe someone else has done this??
Matt :confused:
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