Adjustable Fuel Pressure Regulator Setting Recomendation
Thread Starter
Pro
Joined: Aug 2007
Posts: 668
Likes: 38
From: Austin TX
Adjustable Fuel Pressure Regulator Setting Recomendation
I have a stock 92 LT1 with Walbro fuel pump, factory injectors, minus the pulsator. I may have issue with my factory fuel pump regulator and am considering installing an adjustable unit.
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
Pro
Joined: Apr 2000
Posts: 589
Likes: 3
From: Acapulco Guerrero
I have a stock 92 LT1 with Walbro fuel pump, factory injectors, minus the pulsator. I may have issue with my factory fuel pump regulator and am considering installing an adjustable unit.
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
Team Owner
Joined: Jul 2004
Posts: 28,431
Likes: 3,284
From: Hartford WI
Not sure if you can really adjust it too much since if you jack up the pressure a little, I would think the ECM would sense the richness and compensate. Kinda why I set mine at stock pressure and still do especially since the ECM has been set up for my new system. It might go richer for a while and you may even get away with it in WOT runs but for normal driving, it probably will adjust the pulse width back.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
I have a stock 92 LT1 with Walbro fuel pump, factory injectors, minus the pulsator. I may have issue with my factory fuel pump regulator and am considering installing an adjustable unit.
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
I am requesting the optimal pressure setting for the adjustable fuel pressure regulator.
Thanks
Well if you change fuel pressure you need to change the injector constants too. That means a new tune and in a '92 that would take a new ECM chip.
Best just to set it to stock which is 41psi with the engine off. Now if you have an adjustable regulator and the pressure is to high when you turn the key (but not to start) then you of course need to bleed off some press before readjusting. Finally I would start the motor then shut off to measure the fuel pressure one last time engine off to verify you got it right.
Hope this helps.
Thread Starter
Pro
Joined: Aug 2007
Posts: 668
Likes: 38
From: Austin TX
Thanks. I reinstalled with a factory non adjustable unit.
Well if you change fuel pressure you need to change the injector constants too. That means a new tune and in a '92 that would take a new ECM chip.
Best just to set it to stock which is 41psi with the engine off. Now if you have an adjustable regulator and the pressure is to high when you turn the key (but not to start) then you of course need to bleed off some press before readjusting. Finally I would start the motor then shut off to measure the fuel pressure one last time engine off to verify you got it right.
Hope this helps.
Best just to set it to stock which is 41psi with the engine off. Now if you have an adjustable regulator and the pressure is to high when you turn the key (but not to start) then you of course need to bleed off some press before readjusting. Finally I would start the motor then shut off to measure the fuel pressure one last time engine off to verify you got it right.
Hope this helps.
