Do i have to have a rising rate AFPR? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 4 Old 08-08-2009, 03:15 PM Thread Starter
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Do i have to have a rising rate AFPR?

I currently have a paxton on my turbo car, but i believe its starting to leak fuel a bit out the vac side... Only seems to raise the rate .5:1, give or take. I have a holley on my other car, could swap that over? Money is a bit tight, and i would like to get this thing back together is all. Thanks guys.
Ill be running 42s on my stock 5L with GT40's, cobra intake, e cam and 9-12PSI.
Thanks
Brian


-1982 Mustang GT, T5, 3.73s, EFI'd 408W, soon to be parted and retired
-1991 Notch, numbers matching 2.3l auto, all motor!
-2003 DSG Cobra, 2.8, intake, exhaust, tune, basics.
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post #2 of 4 Old 08-08-2009, 04:14 PM
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you HAVE to run a boost ref regulator !!

IF you cant afford a aftermarket one find a cheap stocker, its not adjustable but it is boost ref


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post #3 of 4 Old 08-09-2009, 01:46 AM
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Yes to do it right you need to have a rising rate regulator that is 1:1. and a stock regulator does just that.

If you dont have one and go under boost, your injectors will flow less fuel per given PW and you will lean out. I suppose if you had other means to increase PW to compensate for the lower flow rate, you could get the AFR back in check but thats a HACK and far from the way it needs to be done.

Brett
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post #4 of 4 Old 08-09-2009, 05:44 AM Thread Starter
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Okay, stock one it is then. Pretty sure this paxton has leakage
Thanks guys. Wasnt sure if the holley adjustable i put on my other car was usable or not. Doesnt seem to be from reading anyways.

-1982 Mustang GT, T5, 3.73s, EFI'd 408W, soon to be parted and retired
-1991 Notch, numbers matching 2.3l auto, all motor!
-2003 DSG Cobra, 2.8, intake, exhaust, tune, basics.
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