I have an adjustable regulator. Whats the procedure for setting the regulator? thanks

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1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)

 

Remove vacuum line and plug line. Leave AFPR port uncapped. Attach pressure guage/hose to the shraeder valve on fuel rail.

Start engine. Read gauge. Adjust AFPR srew clockwise to increase pressure, counter-clockwise to reduce pressure. Try small adjustments in steps (~2-3psi at a time to see where performance/idle change).

Remove all components and replace vacuum line to AFPR.

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KevinP92Z
92 Z28 383 SLP cam,SLP headers,SLP 2ontheLeft,Trick Flow TW heads & pistons,Edelbrock base,Accel SuperRam,52mmTB,Scat Crank & forged ConnRods,MSD 6AL,SLP convertor,Baer 13/12" Track,Moser axles,Hotchkis,Genuine GM 3.42s,SLP HD Torsen,17x9" chrome SS rims
96T/A w/SLP Ram Air,SLP 2ontheLeft, Bilsteins, Baer, Hotchkis, Genuine GM, Torsen
76 4X4 Blazer 400TPI project

 

Thanks for the info but based on my mods do you have an idea of what a base setting might be. Im way high on it tight now i think

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1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)

 

Kevin did an excellent job outlining how to physically adjust fuel pressure. To determine where to set it, you need a scanner to monitor O2 sensor readings at WOT. This is the only scientific way to adjust pressure. It should read 800 - 850 mV. If too high, lower pressure. If too low, raise it.

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
ATI D1SC (8-psig): 12.06 @ 115.94 mph.
Future ATI D1SC (?-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

[This message has been edited by Willie (edited July 06, 2001).]

 

To do this do you make an adjustment first. Then crack it ope full threottle for a few seconds to get a reading?

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1987 T/A GTA 5.7L, Bored .020 and ported for .202 valves, edelbrock headers, flowmaster exhaust, JET STAGE II chip, Comp CAM, Adjustable fuel pressure, Airfoil, K&N filter, B&M stage 2 shift kit, and a home depot ram air(Hey it looks good and it works)