TBIThrottle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.
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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.
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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
__________________ '84 T/A HO 5speed, freshly rebuilt L69
'89 Formula, somewhat modded L03 and soon T56+3.73
do not confuse a lack of traction with an excess of torque
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
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?
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.
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.
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??
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??
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.
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?
