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justin's Avatar
 
Join Date: Apr 2001
Location: Cleburne,Tx
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Adjustable FPR

What are the advantages of a adjustable FPR,besides higher pressure? Is it worth putting on an N/A? I've read places that the 944/924/951's came with more fuel pressure (among other things) but were detuned when entering the US or strict EPA standards, is this true?

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Texas hosts the 928 Owner’s Club OCIC in 2009
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Old 07-12-2003, 10:15 PM
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anyone?????
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Texas hosts the 928 Owner’s Club OCIC in 2009
www.928ocicdfw09.com
1980 928 5 speed and a few mods..........
928 OC member
PCA member
Old 07-13-2003, 09:29 PM
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An adjustable fpr allows you tune a little bit to compensate for modifications. Richening the mixture on a stock engine wont neccessarily increase performance, and may actually reduce it.
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75 914 - Undecided.
80 931 - Gone, but not forgotten.
72 914 - old toy- sold.
And a whole bunch of German scrap metal shaped like 924's.


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Old 07-13-2003, 09:34 PM
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Well, I am running nitrous,but not very often and I do have a cold air intake,I was thinking this: more air more fuel = better performance. My intake is also port matched to my head,bigger plug wires ect. among other mods.
__________________
Texas hosts the 928 Owner’s Club OCIC in 2009
www.928ocicdfw09.com
1980 928 5 speed and a few mods..........
928 OC member
PCA member
Old 07-13-2003, 11:57 PM
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Hook up one of those meters to O2 & see if you lean out whn you get on it.

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Old 07-14-2003, 06:44 PM
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Justin: I am guessing your NOS system is a wet kit, and therefore supplies the additional fuel needed according to the amount of N2o. With the mods that you have, stock fuel pressure is probably enough. The stock EFI system should be able to compensate for the slight increase in air flow. Adding more fuel without increasing air volume will actually decrease performance and throttle response. If you are not sure about your fuel mixture an air/fuel ratio monitor may be worthwhile.

__________________
75 914 - Undecided.
80 931 - Gone, but not forgotten.
72 914 - old toy- sold.
And a whole bunch of German scrap metal shaped like 924's.


Old enough to know better, and stupid enough to do it anyway!
Old 07-14-2003, 07:39 PM
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