Rally Smith

iTrader: (3)

I put in an adjustable FPR and adjusted it to 14.75 psi. My Mileage has DROPPED big time. I assume that backing it down a ways will help but the thing is my engine could use it. So my thinking is that back it down to around 14 psi or so for now. Then when I get my EBL I will be able to dial it in so it is more efficient and not "waste" a bunch of fuel. Would this be correct?
I usually go about 275 or so on a tank, after I'm not even at 200 and down to an 1/8th of a tank. Granted I've been getting on it a little after the adjustment but for the most part keeping habits the same. Any insight or info would be appreciated.

1991 RS 305, cammed, heads, full exhaust, cold air/ram air.

ownor

iTrader: (5)

if i calculated that right you're getting about 17-18mpg? that's not too bad in my book.. how much did you get before all the mods? also where are you driving mostly, city/highway?
you can dial in your BPC injector constants in EBL, if you alter fuel pressure these values need to be adapted in the calibration.

also EBL will provide a nice lean cruise mode, along with some other small feats helping you save some more gas

Rally Smith

iTrader: (3)

Exactly, that's what I was getting. Now after the FPR adjustment, looks more like 13 mpg. Not good!

Like a dumbass I didn't check the fuel pressure before I adjusted it.
So I don't know what the baseline was before I started adding fuel. I'm afraid of going lean or rich, so where do I error on the side of?

Any suggestions to where I should adjust it to? Or at least start back out at?

Ronny

iTrader: (1)

set it to 12 until you begin tuning and stay away from WOT until you get a tune(EBL). At 12 you will be at stock FP and should be drivable. If car coughs(lean on AE) when you accelerate move it up to 13.

ownor

iTrader: (5)

oh okay, i read that wrong about the milage. 13 isn't that good yeah, i'll agree with that the adjustment Ronny suggested should be fine imho

Rally Smith

iTrader: (3)

Stay away from WOT???! What, are you high? Just kidding. I can do that. Thanks for the help guys.

Now if I just had $350 for the EBL.... RBob, you having a sale any time soon??

Icarus 402001

What other mods do you have? What rear? With TPI-type CAI, and 3 " catback on an otherwise stock vehicle, I get 23-24 mpg as a daily driver. Routinely go 300 miles on a tank. That's about 40% highway driving. My pressure gauge reads 12 PSI.

Rally Smith

iTrader: (3)

2:73 stock rear-end, comp cam, edelbrock headers, 3" exhaust, 99% driving in town. Non stock heads with a port job.

I changed my pressure last night to 12.25. Seems to be running fine so far. Of course I only live about 8 miles from work and it's 45 to 60 the entire way.

Is it natural to have the needle on the gauge wobble a little?

thomas1976

FP should not variate. Your set up sounds like lots of fun once your goin to get the EBL to run it. Keep us updated.