Adjustable fuel pressure
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Melting Slicks
Joined: Sep 2003
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From: 1,000,000,001 Posts
Adjustable fuel pressure
Going to install, an adjustable fuel pressure regulator,,,, How do I do it? what kind of performance increase is expected?
How do I raise or lower the pressure?????????
:confused:
How do I raise or lower the pressure?????????
:confused:
Burning Brakes
Joined: Jun 2003
Posts: 949
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From: smithtown ny
Re: Adjustable fuel pressure (1990CORVETTE)
1st you will have to take off the plenum and there are small vacuum lines attached to it so don;t forget to reatach or your car will run like crap 2nd you will see the regulator theres about 6or7 little like star srews it's been awhile since i did mine pop that one off reinstall the new one the same way. as far as adjusting it there should be a nut on top of the new regulator start the car pull the vacuum line off the regulator adjust the nut to lets say 38- 40 psi . i did'nt feel any performance but my car idled alot better .
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Adjustable fuel pressure (1990CORVETTE)
The first thing to do is to measure current fuel pressure at idle with the vacuum line off the stock FPR and use this as your base setting for the AFPR.
An AFPR is a tuning tool and so may or may not result in increased performance at WOT. It all depends on the current A/F ratio at WOT.
You will raise/lower the fuel pressure with the adjusting nut atop the AFPR hat.
An AFPR is a tuning tool and so may or may not result in increased performance at WOT. It all depends on the current A/F ratio at WOT.
You will raise/lower the fuel pressure with the adjusting nut atop the AFPR hat.
Racer
Joined: Oct 2001
Posts: 311
Likes: 2
From: Roseburg OR
Re: Adjustable fuel pressure (1990CORVETTE)
It is more of a tuning aid to adjust the a/f ratio at full throttle.
I would also recommend getting a pressure guage to see what you are setting the pressure to.
If you email me I could scan my holley instructions and send them to you, hawmanai at yahoo.com
I would also recommend getting a pressure guage to see what you are setting the pressure to.
If you email me I could scan my holley instructions and send them to you, hawmanai at yahoo.com
