mixing E85 and 93

[dan2288]

Right now I have a keydiver stage 3 chip made for 93. Would I be ok mixing in some e85 still running that chip? What ratio should I go for and would it even help?

 

[jrohner]

For future reference, the stoich ratio for ethanol is 9:1. You may think it's a nominal difference, but you need the right numbers for any sort of calculations.

I think he meant E85 in the post you're referring to, not pure ethanol which you're correct is 9:1.

E85 is 9.765:1. The E70 winter blend is about 10.7:1

 

[lazyazzdaddy]

I think he meant E85 in the post you're referring to, not pure ethanol which you're correct is 9:1.

E85 is 9.765:1. The E70 winter blend is about 10.7:1

I just want to make sure i get this straight.

I realize there are different summer/winter blends . do you have to tune for both winter and summer? also, i garage my car from October to usually early may when do they switch between the 2 blends?

 

[delta448]

Sorry for the mistake, I actually meant E85. Post edited.

 

[JayRolla]

I just want to make sure i get this straight.

I realize there are different summer/winter blends . do you have to tune for both winter and summer? also, i garage my car from October to usually early may when do they switch between the 2 blends?

Nope, if you have a good tune usually the stock o2 will adjust for 15% fuel difference with the fuel trims and when it switches the ecu should take care of it. I mean I cant even tell when the fuel switched.

 

[bsbllfit7]

bringing this thread back from the dead but my car seems to be quite the knock happy combination. At 22 psi on my old style fp green and literally 0 timing im getting between 0-4 degrees of knock retard. I am looking at throwing in 3 gallons when i fill up just so i can suppress that knock more so. I eventually will be switching to e85 once i get a dd besides my talon but for now i just want a more spirited drive. Im only looking for around 400 hp out of the fp green but the knock is limiting me to around 350.


As a side note what could make my setup knock happy. Its a 9.0:1 compression 2.4l with stock 2g head. Fp green and full supporting mods. If i was to throw in cams would that help??