03-10-2008, 09:11 PM | #1 |
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Fuel Pressure...
I'd like to get some suggestions on where to start setting FP. My combo is listed below in sig..cam specs are as follows:
.512/.512 226*/230* duration 110* LSA I am running a 75mm Maf tuned for 30# injectors and a 75mm throttle body. The AFM power pipe is the 3.5" fenderwell pipe. It has been suggested I start at 36 psi (static) and drive it a week like that. Then, if I'm still getting the piggy condition, drop it back from there. It is currently so rich I left big black circles on the curb at my store today just from letting it idle a few minutes. I am going to try to dyno after about 3-400 miles on the new setup. Hopefully I can get in this weekend. What I am really trying to find out is if anyone has run a similar setup with 30's and what the FP wound up being...
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91 GT Convertible 2006 Nissan Titan LE Crew Cab 2014 Peterbilt 337/Marion 22' box Last edited by banditmwp; 03-10-2008 at 09:13 PM. |
03-10-2008, 09:18 PM | #2 |
Bet I red light B4U
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Hey Preston whats yours sitting at?
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89 gt 2.3 stroked holley head with n12n port high flow intake with great big fart can skunk 2 seat belts with kool glow water squirters and new light up shift knob basically everything from wal-mart art carr C4 10.53@127.3 w/ 1.53 60' 89 gt vert 347 eldebrock heads and intake AOD w/3000 stall unknown with 5spd went 12.7 on steet tires 04 Mach1 automatic flowmaster K+N drop in 13.9 |
03-11-2008, 09:38 AM | #3 | |
Daddy x4 ...we're done
Join Date: Dec 2004
Location: Oxford, AL
Posts: 11,551
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Quote:
Put it at 38psi and let the long-range fuel trims in the computer sort it out. If it's too far off to compensate, then you may want to start saving up for a tuner.
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03-11-2008, 11:36 AM | #4 |
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Join Date: Dec 2004
Posts: 6,313
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Yup. That factory tune can only do so much with all those bolt-ons feeding the engine all that extra air... Changing the fuel/timing load calculations will be more beneficial than fuel pressure to get a really accurate tuneup.
I've never seen much difference in changing fuel pressure +/- 5 psi from stock.
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