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E85 Conversion... Now I have KR?

blackgtp95

blackgtp95

New member
I just converted to E85 this week and I now have 1-3 degrees of knock on my 3.4 pulley when I used to have 0 on my 3.2 pulley

Doesn't seem to make sense to me

Here is my tune

https://dl.dropboxusercontent.com/u/17020038/E85 Tune.hpt

and here is my 40 min scan (WOT towards the last 10 mins)

https://dl.dropboxusercontent.com/u/17020038/E85 40 mins.hpl

I am fairly new to tuning but I though everything I did was correct

I scaled my 60# injectors to 42 and that is it, I had the commanded AFR at 11.7 but when I saw 8 degrees of know I moved it back to 11.0

I should note Histogram 10 is my Wideband

Any help would be appreciated as I though E85 was a super knock suppressing fuel.....
 




Apparently my tune file was somehow corrupted.... Not really sure went back to an old tune from a few years ago and did "Write Entire" instead of just calibrating and I now have LTFT again and only 1 degree of KR

I will update after I dial in my LTFT's after I do some logging as they are pegged at 16.4 and after cruising for 20 mins they are going to 10.4 which is terrible and they are not locking at 0.0 when WOT

Thanks
 
What I did was take the 42.5 inj tables and i added 30% fuel to the IFR table, i adjusted my commanded AFR to 12.2 and i never touched the MAF either but also considered doing some PE adjustments, im not sure why you are knocking on a 3.4 on e85 if u did not knock on a 3.2 i want to say you should review your fuel tables and see where you may have missed something. I was actually able to up my timing quite a bit. And im top swapped on a 3.4mps . view signature. I am running 19* timing WOT w/0*KR I have room for more. When I first messed with E85 i **** myself cause i blew a head gasket! Lets just say i didn't know wtf i was doing when i first messed with E85, so i did some more studying while i switched back to 93 octane again. And now I love it and i love my mpg im getting as well.

I couldn't begin to give you advice on the hpt tuning as I use DHP. But I have a feeling you need to really just take the #60 tables and ADD 30% to the IFR tables. Good luck.
 
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