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Author Topic: FP regulation on 1.6
d mathias Verified Driver Made Donation to Website
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Would someone educate me on the necessity of a fuel pressure regulator on a 1.6 car? When I bought my current motor the builder was pretty adament that I measure the high-side fuel pressure to insure that it was within factory range, lest bad things happen to my new motor. Apparently lack of adequate pressure is not good(done blowed up). I imagine that a regulator can only lower pressure. When I can control lean/rich at the MAF clockspring why would I want to lower FP?

I'm only asking because I want to know.

Thanks,
Denny

davew Verified Driver Made Donation to Website
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I have only dynoed a single 1.6 car with an adjustable regulator. The adjustable regulator made more power with an untouched AFM than adjusting the AFM.

Admittedly this is a sample of one. As I get time to try more cars, I post my results.

Dave

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Jamie Tucker Series Champ

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Region: CFR
Car #: 97
Year : 1990/99
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I have seen [Smile] people adjust fuel pressure in 1.6 for a longtime. It makes for a better tune then just jacking with the AFM. Fuel pressure will make slightly more power and a lot better drivability as the AFM spring stays closer to its stock location.

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darmstrong Verified Driver
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Will Dave's adjustable regulator set up for the 99 work for a 1.6, or will it need a different setup?

Dave
SM #66

Cajun Miata Man Verified Driver
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Region: Houston; SWDIV
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Year : 99
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I don't think Dave 99 setup will work with a 1.6. The fuel delivery systems are different setups and don't work the same. The 1.6 is a loop back and the 99 a dead head.

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Greg Kimble Verified Driver
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In another post Dave said that he is working on a set up for the 1.6 and 1.8 cars that he expects to have ready sometime this month.

davew Verified Driver Made Donation to Website
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When I get home from Homestead I will be working on the NA regulator. I know it will help on the 94-95 car. The 96-97 will work, but I don't know how much benefit it will be.

1.6 has worked on the one car I tested. More dyno work is exoected when I get back home

Dave

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darmstrong Verified Driver
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I'm hoping for 5-6hp, that way I won't have to buy a Pro head.

Dave
SM #66

Steven Holloway Verified Driver Made Donation to Website
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Car #: 97
Year : 91
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Any wild guesses about price?

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PedalFaster Verified Driver
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Year : 1995
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quote:
Originally posted by darmstrong:
I'm hoping for 5-6hp, that way I won't have to buy a Pro head.

But everyone with pro heads will also be getting fuel pressure regulators, and getting as much or more power improvement...

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Stephen Hui - '95 SM #86, Northwest / Oregon Region SCCA

darmstrong Verified Driver
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Damn, I forgot about that. Back to square .

Dave
SM#66

   

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