Do I need a fuel pressure regulator? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**IT Cowboy** · Yesterday, 05:31 PM

I keep reading that the Rochester carb likes lower fuel pressure around 6-8 lbs? Does a replacement fuel plump provide too much pressure and should I put in a regulator or just a pressure gauge for now or neither is really needed.

Dead Parrot · Yesterday, 06:21 PM

Possible your vacuum gauge includes a fuel pressure function. Used to be a common combo. Does it have a 2nd arc of numbers from 0~8 or such?

If the pump is working correctly, then a Q-jet shouldn't need a regulator. BUT we all know that QA is a often skipped step these days.

**raggedjim** · Today, 11:03 AM

I've used them before without any regulation, but this last engine I put on an Edelbrock fuel pump that is supposed to limit fuel pressure without a regulator. I have the part number in the garage if you want it.

If you do run a regulator don't get the round dial type. The gaskets fail and pose a fire risk.

Yesterday, 05:31 PM	#1
IT Cowboy Senior Member Join Date: Jan 2025 Location: Clarkdale, Arizona in a van down by the river Posts: 225	Do I need a fuel pressure regulator? I keep reading that the Rochester carb likes lower fuel pressure around 6-8 lbs? Does a replacement fuel plump provide too much pressure and should I put in a regulator or just a pressure gauge for now or neither is really needed. __________________ '72 C10 / 402 ___________________________________________ Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility.

Yesterday, 06:21 PM	#2
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,648	Re: Do I need a fuel pressure regulator? Possible your vacuum gauge includes a fuel pressure function. Used to be a common combo. Does it have a 2nd arc of numbers from 0~8 or such? If the pump is working correctly, then a Q-jet shouldn't need a regulator. BUT we all know that QA is a often skipped step these days.

Today, 11:03 AM	#3
raggedjim Senior Member Join Date: Jun 2002 Location: Murray, Kentucky Posts: 3,610	Re: Do I need a fuel pressure regulator? I've used them before without any regulation, but this last engine I put on an Edelbrock fuel pump that is supposed to limit fuel pressure without a regulator. I have the part number in the garage if you want it. If you do run a regulator don't get the round dial type. The gaskets fail and pose a fire risk. Attached Images __________________ Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer - https://67-72chevytrucks.com/vboard/...d.php?t=856475 '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 Ideas - https://67-72chevytrucks.com/vboard/...d.php?t=851743 Last edited by raggedjim; Today at 11:12 AM.

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