e85 kicks ass

[Riftur]

Originally Posted by MileMonger

Steve99 is helping me figure this out over on the How to Run E85 on stock 86 FRS BRZ thread. As of right now he wants me to log some full throttle pulls so he can look over rthe data, but so far most things seem okay. I'll update when we have more info.



Are those the ones in the Miami Lakes area? My fuel trims show me I'm close to or just over 70% ethanol content, but it might be worth a try to get gas somewhere else.

When I do my pulls for steve99 I'll let you know for sure I notice a difference in gears 1-3. Right now, pulling away from a red light in traffic (so not fast) the car feels hesitant, and I'm finding myself having to ride the clutch longer (even on first) so I won't stall or jitter around. Once I get going it feels about the same as 93.


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I never checked the % I was getting from the e85 I buy. Since its a shell station i really assumed it would be closer to 85. The engine noise you hear at 3200 rpm is the same noise I get on the stock 93 tune also for the OFT. Its normal. The other issues are not normal. I do feel the need to push the gas pedal down a little further when leaving from a stop if I am driving calmly. I do not know why this is but i also can feel more pull from the car once it gets going. If you get a tune that works better on this gas let me know.

[MurderousPandas]

Originally Posted by Riftur

I never checked the % I was getting from the e85 I buy. Since its a shell station i really assumed it would be closer to 85. The engine noise you hear at 3200 rpm is the same noise I get on the stock 93 tune also for the OFT. Its normal. The other issues are not normal. I do feel the need to push the gas pedal down a little further when leaving from a stop if I am driving calmly. I do not know why this is but i also can feel more pull from the car once it gets going. If you get a tune that works better on this gas let me know.

OTS tunes are best until you get custom. When starting from a stop, does the pedal feel like it has a dead spot or does the engine bog? If you have an aftermarket intake, you may need to scale MAF. These tunes do need some miles to get rid of any dead spots in the gas pedal sometimes too.

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[Riftur]

Originally Posted by MurderousPandas

OTS tunes are best until you get custom. When starting from a stop, does the pedal feel like it has a dead spot or does the engine bog? If you have an aftermarket intake, you may need to scale MAF. These tunes do need some miles to get rid of any dead spots in the gas pedal sometimes too.

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I think its more of a dead spot. I am on my 3rd tank of e85 currently.

[ApexEight]

Do the OTS E85 tunes help improve throttle sensitivity? I feel like the stock throttle mapping is a bit mushy and not as responsive as I want.

[MileMonger]

Originally Posted by Riftur

I never checked the % I was getting from the e85 I buy. Since its a shell station i really assumed it would be closer to 85. The engine noise you hear at 3200 rpm is the same noise I get on the stock 93 tune also for the OFT. Its normal. The other issues are not normal. I do feel the need to push the gas pedal down a little further when leaving from a stop if I am driving calmly. I do not know why this is but i also can feel more pull from the car once it gets going. If you get a tune that works better on this gas let me know.

I thought the same thing too, but according to everyone on the How to run e85 thread, most stations will be closer to 70%, some even less, specially for winter. The Shell I have by my house says "minimum 70% ethanol," but when I mentioned this on the other thread, everyone said it says that but their flex fuel sensors sometimes show less or more.

I didn't get any strange noise on the 93 tune. I even flashed back after three tanks of e85 to make sure it wasn't just in my head, noise-wise and sluggish driving-wise and no, the 93 tune is quiet and smooth. After two months of 93 I'm back on e85 and I feel the sluggishness as well as the extra loud throttle sound between 2500-3200 rpm.

Will let you know if I get any tweaks from the other thread.

Originally Posted by MurderousPandas

OTS tunes are best until you get custom. When starting from a stop, does the pedal feel like it has a dead spot or does the engine bog? If you have an aftermarket intake, you may need to scale MAF. These tunes do need some miles to get rid of any dead spots in the gas pedal sometimes too.

The throttle definitely has a dead spot, and I'm sure that's contributing to the struggle to get going. Last night it took a few seconds to back out of the parking at work.. it was pretty sad lol. Since it's on an incline, the car felt like it had no power to get back onto the even surface... -_- I tried giving it more gas each time, and could hear the engine winding louder, but the car wouldn't move and would roll back to the bottom of the incline as soon as I backed off the throttle just a bit. It wasnt until I gave it more throttle than needed, and modulated the clutch, that I got going. I just recently got an air inlet tube, but that's all the aftermarket I have and feels the same as when I was on stock for three tanks earlier this year.

Originally Posted by ApexEight

Do the OTS E85 tunes help improve throttle sensitivity? I feel like the stock throttle mapping is a bit mushy and not as responsive as I want.

I feel like the mapping on the 93 tune is much better than on the E85. Feels nice and progressive with more response. As you can see, the 85 tune seems to have a dead spot right when you start pressing the throttle, the rest of it, to me, doesn't feel as good as the 93 tune, but you should read what others have to say in the How to Run E85 on a stock 86/FRS/BRZ thread, since it seems I'm the one having issues.

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