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Learning E85, what a [email protected]$!ing difference!

Old 06-08-14, 11:13 AM
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Learning E85, what a [email protected]$!ing difference!

After reading through all of the E85 threads I could, and asking a few questions I'm really liking the power of E85. I'm hooked! Getting over the hurdles of ignition switching from all 9's to all 10.5 was the best improvement. Also recalibrate the wideband to read E85, the car loved 7.3-7.5 with a BW S466 turbo 15 psi was fun but 20 psi was AMAZING. Wheel spin from 5,500-7,500 in third. We have not put the car on the dyno yet so numbers to come (along with 9,500RPM).

I would like to get some input from anyone's experience with idle to WOT reving. It seems as though I can tune in the free Rev of the car by adding 1.2ms of fuel in the reving cells from 2k-4k and it feels great, the same points that I tune affect under a load in just driving around 15%-25% throttle just bucks from all the fuel. I take the fuel out and cruz becomes drivable no bucking. Then back to boggy lean revs. It's like one or the other. Otherwise full throttle only and the car loves it

Once I get this figured out planning to hit the dyno and see what the car can do at top end. Should be interesting.
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Old 06-21-14, 12:14 PM
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When you say 'idle to WOT revving', most ECUs will consider that acceleration fuel enrichment, accel fuel, accelerator pump, transient fueling, tip-in fueling, delta throttle enrichment ... there are quite a few names that get used to describe the same situation but there is usually some sort of way to add a quick shot of fuel when you press the throttle quickly. You're describing two different situations: pressing the throttle quickly and pressing it slowly... there are two different places in the calibration that should be adjusted to handle this. If possible, get the main fuel map adjusted so the car runs correctly when you are moving through those cells slowly (climbing a hill in the wrong gear, for instance) and then adjust the acceleration fuel so it is still responsive to quick throttle transitions.
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Old 06-30-14, 11:08 PM
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Originally Posted by scotty305 View Post
When you say 'idle to WOT revving', most ECUs will consider that acceleration fuel enrichment, accel fuel, accelerator pump, transient fueling, tip-in fueling, delta throttle enrichment ... there are quite a few names that get used to describe the same situation but there is usually some sort of way to add a quick shot of fuel when you press the throttle quickly. You're describing two different situations: pressing the throttle quickly and pressing it slowly... there are two different places in the calibration that should be adjusted to handle this. If possible, get the main fuel map adjusted so the car runs correctly when you are moving through those cells slowly (climbing a hill in the wrong gear, for instance) and then adjust the acceleration fuel so it is still responsive to quick throttle transitions.
Got it figured out with the pump 1 and pump 1 trigger to be set to enrich with a blip of more then 5% TPS trigger, it sends a shot of fuel on tip in. The funny thing is the motor is one thirsty bitch loved 40% extra fuel at low RPM blips. Revs and drives great now.
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