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Old 05-02-2003, 01:45 AM   #1
Rubasu
Scooby Specialist
 
Member#: 1418
Join Date: May 2000
Location: Swedesbor, NJ, U.S.
Vehicle:
MY00 2.5RS
Aspen White

Default need more fuel.......??

Curious as to at what point an N/A RS will need a rising rate fuel pressure regulator? I currently have:

Borla Headers
Random Tech. Cat
2.5 inch Cat Back
Intake
Pulleys

and am sending out both an Intake Manifold and throttle body out to be bored and honed. Will I see any difference If I were to add a Pressure Regulator now or is it not worth it.

Thanks

Rubasu
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Old 05-02-2003, 03:24 AM   #2
joefocker20
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Member#: 13745
Join Date: Dec 2001
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2004 STI
Silver

Default

Not worth it yet..
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Old 05-02-2003, 11:40 AM   #3
BOY
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Member#: 232
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: Ft Wayne, IN
Vehicle:
99 RS-T RIP
02 Forster-S

Default

You already have a rising rate FPR stock, its 1:1 but its rising rate. A replacement RRFPR is designed to flow more fuel at higher pressures (2:1, 4:1, etc) at greater than atmospheric pressure, a N/A car (w/o some serious ram-air action) will never go more than a psi (two is pushing it). An adjustable FPR which allows you to raise baseline fuel pressure is what you want and even then its just a band-aid for poor fuel system management.
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