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Take a look at the pic with OEM and Mallory side by side. Now imagine the adjustment screw being up about 1/4" more (factory setting @ ~45 psi).
Now, go under your hood and feel the room that exists between the FPR and the bottom of the upper. There isn't much! While you are in there, try to imagine how you'll get tools in there (the TB flange shields your access even more) to tweak the fuel pressure to where you want it. I doubt it could be made to work, but I also wouldn't mind being proven wrong.
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Joined: Dec 2000
Posts: 115
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I know this may sound a little odd... but could you maybe extend the fuel rail so you would end up mouting the FPR under the MAF or something instead... I would assume with a little bit of hose and some good fittings you should be able to extend the rail just a little bit at least.
2000 Cougar V6 MTX Black Visteon GFX Kit with Razzi rear skirts, Ground Controls, YoDude Exhaust, Ractive Filter, Custom Interior, Custom Loud Stereo, and more... See Her Here
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Joined: Mar 2001
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Same issue I am having with the electric fuel pressure gauge. I am having a schrader valve adapter made right now that will run off to a peice of steel braided line out the sender. Should be in my car in the next week.
1991 GVR4
Lots of mods done.
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Joined: Jun 2001
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The idea of an adapter crossed my mind, but I think that is a little half-@ssed. If it comes down to it, I am going to do it right and get a set of 24 pph injectors.
T-Red, I'd be very interested in seeing your fuel pressure sender setup. That's one of the gauges I want to put in my (future) gauge pod. Along with Oil pressure (duh) and volts.
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PA 3L SVT- Just read this off the SHOTimes FAQ in regards to upping the fuel pressure. I don't know if it's totaly accurate, but it might lend some insight into why an Adj.FPR might not work.. http://www.shotimes.com/SHO4fuelpressure.html Scott K. just used some of the above info in a recent post here RE: WOT Adaption I tend to think that the APEXi might be the hot ticket for now, until someone gets the EEC stuff figured out... Alex in Boulder, CO 95SE MTX 157hp 151 tq before latest mods...
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Boosting the fuel pressure is a cheap and easy (well, it was supposed to be) way to turn 19 pph injectors into ~21 pph w/o pulling the fuel rail. I agree with the information in that article. However, it makes it seem like adj FPRs are worthless, which is not totally true. They can be very helpful in correcting a lean condition that occurs in the top end, i.e. the current fuel delivery rate is insufficient for high RPM at WOT. Exactly what I was trying to accomplish. Now I just need to get my S-AFC installed and dyno tuned to determine once and for all if 19 pph injectors aren't enough for me.
However, as that article stated, if you are running lean all the way through the RPM band, this product won't do squat in the long term.
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Joined: Nov 2001
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Thanks for the feedback guys. The article regarding how the EEC compensates for increased fuel pressure doesn't seem to jive. (Note that from the outset, it's written by a guy trying to sell something - a calibrator???)
Think of it this way...
Basically, with all your mods you've increased airflow to a point where the car runs lean throughout the rev range. The very fact that it's running lean means that the EEC has been unable to compensate for the increased fuel requirements at the current feed rate. It can no longer increase injector pulse width to give more fuel to compensate. The injectors are running at max duty cycle.
Enter the FPR which boosts the fuel pressure across the board.
Now the EEC reduces pulsewidths back to a safe duty cycle levels. A/F begins to read at Ford intended ratios - slightly rich (if my memory serves me correctly). The O2 sensor sends a good signal back to the EEC.
Does this line of thinking make sense to anyone else?
Anyways, I'll be dropping by Ramchargers tomorrow to take a look at the FPR in person and decide if it looks like it will fit or not. I'll probably end up buying it and an OEM regulator as well and return whichever one I decide not to use.
Vortech has an FPR as part of their supercharger kit - so it's definitely doable. On the other hand, Vortech also gives you a new chip to go with the FPR so that might explain why it's worthwhile.
99 Cougar MTX
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I should add one other thing...
My situation is that I will be upgrading from a stock UIM/LIM setup (with 31mm/32mm lowers) to the full BAT setup (34mm/35mm lowers + double EH uppers + SVT TB + 19lb injectors)
I'm hoping that the 19lb injectors will compensate directly for increased size of the lowers and increased airflow of the rest of the SVT stuff. Unlike other Cougar owners who already have the SVT lowers with their returnless systems, my EEC is calibrated for the smaller diameter lowers.
(If anything, I suspect that I will most likely end up dialing down pressure by a few PSI with an adjustable FPR to tune for an overly rich condition)
99 Cougar MTX
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