Jtax05

Curious if any pump e85 is good for the APR gts turbo e85 tune? I live in Ohio we have e85 every where and all the states around you can find it. Also what’s longest people let there car set in between uses with e85 ?

asellus

Yes. APR's E85 tune is good for use with pump-advertised E85, which if I recall correctly has to be between ~E50 to ~E80 in the US.. there's a legal spec somewhere, the gist of it is "more than e50, less than e83" for us here. It doesn't matter where you are in that range, the APR tune will work. You only run into trouble if you're trying to blend E85 and E10, and that's because the 911 does not run a flex sensor.

E85 can sit for months without a problem. The water settles out of the fuel over time (I believe it precipitates out of the ethanol? not a chemist here and too lazy to look it up). One good slosh, like from leaving your driveway, reabsorbs most of it and you'll be fine. I got to play around with this when draining a fuel tank that sat for a couple years into a bucket. Swirled it around and watched the water disappear, it was pretty cool.

Generally speaking, if you drive your car with any semblance of regularity you'll be A-OK.

The real concern is whether or not you want to deal with the headache of being forced to always fill with E85. Around here that's an enormous pain in the ***, so a 91AKI tune is where it's at.

blackcheetah

i would go gts and cobb protune anytime, i had apr gts before and your limited to 23psi with there tune on e85 ,with a protune you will max out the gts at around 30psi and get your 650hp on e85

mrneef

how safe is that on a stock motor and pdk?