525sc fuel pressure

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10-14-2012 | 06:42 PM

houde0069

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525sc fuel pressure

Just ordered a Holley black. Their website says pump runs 140hph at 14psi..... Need to know if I need to regulate that down to 7psi?
It's a stock 1995 525sc

10-14-2012 | 09:09 PM

dykstra

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From: Washington, IL

I would think so. PM GRIFF he is the resident 525SC guru.

10-14-2012 | 11:42 PM

badluck

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From: Gothenburg, Sweden

I would regulate it down to 7psi. Not sure if the needle valves would seal with too high preassure.

10-19-2012 | 08:28 AM

MILD THUNDER

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From: chicago

Yes, it needs to be regulated down to 7psi. Why the change? Stock pump is just fine to support it.

10-19-2012 | 05:32 PM

Back4More

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From: Lake Michigan

Yeah, Why?

10-20-2012 | 09:07 AM

houde0069

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Quote:

Originally Posted by Back4More

Yeah, Why?

Long story short I thought the pump was bad.. Turned out it was the oil pressure switch. So now I have a extra Pump.

10-20-2012 | 09:27 AM

Biggus

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From: Naples, Maine

Quote:

Originally Posted by MILD THUNDER

Yes, it needs to be regulated down to 7psi. Why the change? Stock pump is just fine to support it.

FWIW, I'm not a fan of mechanical fuel pumps in hi demand applications. They all seem to gradually lose fuel pressure over time due to premature fuel pump cam lobes going flat. -Even with several different tipped push rods.

Swapping to all electric fuel pumps eliminates a source of metal in the oil.