will this work on NA engines

bruno · 01-07-2001, 11:26 PM

i was wondering if a fuel pressure riser or regulator will add any horsepower, or what is its purpose and will it work on na engines and which ones are good

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spunky · 01-08-2001, 01:42 AM

I'm wondering how that will work myself. I have MRT headers/exhaust and cobb intake. herad that weapon R FPR sucks. any advice

thanks
bret

Die Civic · 01-08-2001, 01:59 AM

A fuel pressurizer, won't ADD HP, all it does it, supply more fuel into the fuel rail/injectors. It would help on a turbo, but it could help on a N/A car if you have an AFR reading that you're too lean, which I highly doubt would happen unless you over gapped the spark plugs.

Aspen · 01-08-2001, 10:36 AM

See my other post.

Fuel pressure risers will only work if you're car is sucking in a good amount more of air and your fuel system for some reason can't handle the extra air with more fuel. The trick is to maintain a good fuel/air ratio around 14.7:1 for NA motors. If you have some drastic cams and headwork done to a point where your a/f is low, then yes, increasing fuel pressure can help you out.

On MAF systems, the ecu is able to compensate the additional fuel for mostly mild mods. In Subarus case on the '99 models, adding an intake will let your motor run lean above 4.5K but you should get an electronic device for that since a Fuel pressure riser adds fuel across the whole rpm range and you only want fuel in the rpm range where it is needed. Too much fuel will make your engine bog, not to mention fail emmissions.

01-07-2001, 11:26 PM	#1
bruno Scooby Specialist Member#: 2903 Join Date: Nov 2000 Chapter/Region: Tri-State Location: www.njimprezaclub.com Vehicle: 1999 Impreza 2.5rs bmw steel greay	will this work on NA engines i was wondering if a fuel pressure riser or regulator will add any horsepower, or what is its purpose and will it work on na engines and which ones are good * Registered users of the site do not see these ads.

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01-08-2001, 01:42 AM	#2
spunky Scooby Newbie Member#: 851 Join Date: Feb 2000	I'm wondering how that will work myself. I have MRT headers/exhaust and cobb intake. herad that weapon R FPR sucks. any advice thanks bret

01-08-2001, 01:59 AM	#3
Die Civic Scooby Specialist Member#: 3301 Join Date: Dec 2000 Location: Queens, New York Vehicle: 2001 RS Aspen White	A fuel pressurizer, won't ADD HP, all it does it, supply more fuel into the fuel rail/injectors. It would help on a turbo, but it could help on a N/A car if you have an AFR reading that you're too lean, which I highly doubt would happen unless you over gapped the spark plugs.

01-08-2001, 10:36 AM	#4
Aspen Scooby Specialist Member#: 145 Join Date: Aug 1999 Chapter/Region: MWSOC Location: The Windy City Vehicle: Banned to Housework for Summer	See my other post. Fuel pressure risers will only work if you're car is sucking in a good amount more of air and your fuel system for some reason can't handle the extra air with more fuel. The trick is to maintain a good fuel/air ratio around 14.7:1 for NA motors. If you have some drastic cams and headwork done to a point where your a/f is low, then yes, increasing fuel pressure can help you out. On MAF systems, the ecu is able to compensate the additional fuel for mostly mild mods. In Subarus case on the '99 models, adding an intake will let your motor run lean above 4.5K but you should get an electronic device for that since a Fuel pressure riser adds fuel across the whole rpm range and you only want fuel in the rpm range where it is needed. Too much fuel will make your engine bog, not to mention fail emmissions.