Safe fuel pressure range?
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Safe fuel pressure range?
What is the range over which the fuel pressure should be for a mild, street 383? Minimum? Maximum?
I thought it should maintain about 6psi but as the car warms up it comtinues to drop to 3 psi after the car is warm. The fuel pressure regulator and fuel pump (electric pump located in the rear) are both brand new as well as all of the filters, etc.
Thanks
shane
I thought it should maintain about 6psi but as the car warms up it comtinues to drop to 3 psi after the car is warm. The fuel pressure regulator and fuel pump (electric pump located in the rear) are both brand new as well as all of the filters, etc.
Thanks
shane
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Agreed. But even at 3 psi the car is running fine and rich even (I do need to turn down the idle mixture screws). I just can't figure out what else would cause this.....Started after I overheated the car during a 4th of July parade and ever since I can't maintain a fuel pressure. When the car is cold....6 psi. After it warms up, levels out at 3 psi.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Don't use one of those tiny liquid filled fuel press guages inside the eng compart.
We found once the eng comp heats up the liquid inside the gauge ruins the reading.
BTW i now use a Holley electric fuel press gauge - only $75 - and its mounted in my clock hole on the instrument panel.
If u use a small gauge inside the eng comp use a "dry" gauge and average the readings as the needle will bounce.
Hope this helps ya'
cardo0
We found once the eng comp heats up the liquid inside the gauge ruins the reading. BTW i now use a Holley electric fuel press gauge - only $75 - and its mounted in my clock hole on the instrument panel.
If u use a small gauge inside the eng comp use a "dry" gauge and average the readings as the needle will bounce.
Hope this helps ya'
cardo0
Burning Brakes
Joined: Mar 2004
Posts: 816
Likes: 1
From: Finland
Agreed. But even at 3 psi the car is running fine and rich even (I do need to turn down the idle mixture screws). I just can't figure out what else would cause this.....Started after I overheated the car during a 4th of July parade and ever since I can't maintain a fuel pressure. When the car is cold....6 psi. After it warms up, levels out at 3 psi.
3psi means you have something "wrong/broken" somewhere
Thread Starter
Drifting
Joined: Aug 2004
Posts: 1,677
Likes: 1
From: Potomac Falls VA
Don't use one of those tiny liquid filled fuel press guages inside the eng compart. We found once the eng comp heats up the liquid inside the gauge ruins the reading.
BTW i now use a Holley electric fuel press gauge - only $75 - and its mounted in my clock hole on the instrument panel.
If u use a small gauge inside the eng comp use a "dry" gauge and average the readings as the needle will bounce.
Hope this helps ya'
cardo0
We found once the eng comp heats up the liquid inside the gauge ruins the reading. BTW i now use a Holley electric fuel press gauge - only $75 - and its mounted in my clock hole on the instrument panel.
If u use a small gauge inside the eng comp use a "dry" gauge and average the readings as the needle will bounce.
Hope this helps ya'
cardo0
