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Australian Falcons Discuss the australian born and bred models here. Includes the 80's 90's and present day Falcons offered by Ford Oz.

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Old 12-24-2004, 22:55   #1 (permalink)
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The deal with Fuel Regulators?

Hey all,

I keep hearing about people modding their cars and getting new fuel rails and regulators.
I'm a bit lost, what exactly are they and how do they increase performance?
Would getting a good adjustable fuel regulator be a good mod to do on my EA?
So basically they allow you to control the fuel pressure that goes into your engine is what I'm thinking of here.
I heard it can also damage the engine.

Any info greatly appreciated!
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Old 12-25-2004, 00:21   #2 (permalink)
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Re: The deal with Fuel Regulators?

Alright. The fuel pump delievers fuel to the fuel rail, the injectors are mounted off this. At the end is a fuel pressure reg, it lets excess pressure out of the rail. If you mod the engine enough you'll need to get more fuel in, especially at higher revs. An aftermarket reg ups the pressure in the rail, meaning more fuel is in there for when it's needed. A rising rate regulator ups the pressure as the revs rise.

On a stock engine it's not really needed, unless it's leaning out don't bother. And yes, running an engine too lean can cause higher combustion temps and damage the engine.
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Old 12-25-2004, 04:00   #3 (permalink)
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Re: The deal with Fuel Regulators?

rising rate???? ups pressure as revs rise or as boost in creases?
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Old 12-25-2004, 04:11   #4 (permalink)
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Re: The deal with Fuel Regulators?

The Ford fuels systems run the cars rich when you have your foot down. This causes problems when you have modified your engine because you have too much fuel going into your engine. You use an ajustable fuel reg to DECREASE the pressure - which lowers the amount of fuel injected. This gives you more power at full throttle. The alternative is to use a chip to trick the computer to keep the injectors open for a shorter period of time. I went down the chip route, and used a chiptorque to move the AFR from a rather rich 10.5 to a safe 12.5.

It is not until you have some SERIOUS power - like over 180rwkw that you have to start thinking about upgrading your fuel system to put more fuel in.
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Old 12-25-2004, 04:37   #5 (permalink)
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Re: The deal with Fuel Regulators?

IF it glows red its prob to lean :>:>:> kididng
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