How to run E85 on stock 86 BRZ FRS with OFT tune

[MileMonger]

Originally Posted by steve99

Their is little bit of consisrent knock betwern 2000-3000 rpm in the 0.7 to 1 liad area jyst need to pull a liytle timing maybe -1 out of a few celks in that area. Maf sxaking might need a tidy up in low rpm area as well otherwise nit to bad

Hey Steve99,
I pulled the timing like you said. I also followed the directions on the video included in the tutorial, and this is what I came up with:

Original timing:


After pulling by -1, and surrounding cells by a little less as suggested in the video. In this case, by -0.35.


Difference:


Haven't meddled with the MAF scaling yet.
Seems to run more smoothly, got about 40 miles on this tune so far.
Here are two data logs after ~25 miles showing no knock:

http://datazap.me/u/milemonger/20-th...=0&data=1-4-12

http://datazap.me/u/milemonger/short...g?log=0&data=1

Could you check this out and see if it's okay?
Thanks so much steve!

[steve99]

Originally Posted by MileMonger

Hey Steve99,
I pulled the timing like you said. I also followed the directions on the video included in the tutorial, and this is what I came up with:

Original timing:
Attachment 153866

After pulling by -1, and surrounding cells by a little less as suggested in the video. In this case, by -0.35.
Attachment 153869

Difference:
Attachment 153868

Haven't meddled with the MAF scaling yet.
Seems to run more smoothly, got about 40 miles on this tune so far.
Here are two data logs after ~25 miles showing no knock:

http://datazap.me/u/milemonger/20-th...=0&data=1-4-12

http://datazap.me/u/milemonger/short...g?log=0&data=1

Could you check this out and see if it's okay?
Thanks so much steve!

cannot really tell much as no full throttle runs . you also need to log Throttle instead of inj timing and maybe Feedback knock FBKC instead of KC learned

[MileMonger]

Originally Posted by steve99

cannot really tell much as no full throttle runs . you also need to log Throttle instead of inj timing and maybe Feedback knock FBKC instead of KC learned

Hey Steve,

Here are three pulls on third:

http://datazap.me/u/milemonger/wot-e...log=0&data=1-5

http://datazap.me/u/milemonger/wot-e...g=0&data=1-4-5

http://datazap.me/u/milemonger/wot-e...g=0&data=1-4-5

I don't have any option that says either Feedback Knock Control/Correction or FBKC... What am I missing?

The only thing I found was:

Originally Posted by steve99

OFT logging now monitor's FLKC and Knock correction (FBKC)

FBKC is most noticeable in 2000-3200 RPM high load
FLKC is most noticeable in 5000-7500 RPM high load

If this is it, then I do have it active.

Thanks again!

[Kodename47]

While it's good to monitor FBKC, it won't occur during a WOT pull.

[steve99]

Originally Posted by MileMonger

Hey Steve,

Here are three pulls on third:

http://datazap.me/u/milemonger/wot-e...log=0&data=1-5

http://datazap.me/u/milemonger/wot-e...g=0&data=1-4-5

http://datazap.me/u/milemonger/wot-e...g=0&data=1-4-5

I don't have any option that says either Feedback Knock Control/Correction or FBKC... What am I missing?

The only thing I found was:


If this is it, then I do have it active.

Thanks again!

haha its good you have zero fbkc and flkc, this is what you want no knock correction.


by active I meant that that's the type of knock you would see , if their was any.


you have no knock.


all ok.


Its a little rich mid/high rpm. you could do a little open loop maf scaling if you wanted but not rearly necessary

[MileMonger]

Originally Posted by steve99

haha its good you have zero fbkc and flkc, this is what you want no knock correction.

by active I meant that that's the type of knock you would see , if their was any.

you have no knock.

all ok.

Awesome! Thanks so much Steve!

So does E85 simply rev louder than 93? I'm still hearing the louder revs but not as often as before, or as consistently between 2300-3200 rpm. Sometimes it's only present closer to the top of that range.

Originally Posted by steve99

Its a little rich mid/high rpm. you could do a little open loop maf scaling if you wanted but not rearly necessary

Thanks again! Sounds like the next step, going to read up on this and get on it when I get a chance.

[steve99]

Originally Posted by MileMonger

Awesome! Thanks so much Steve!

So does E85 simply rev louder than 93? I'm still hearing the louder revs but not as often as before, or as consistently between 2300-3200 rpm. Sometimes it's only present closer to the top of that range.



Thanks again! Sounds like the next step, going to read up on this and get on it when I get a chance.

cam timings for 93 and E85 are pretty well same , its just the ignition timing that changes, so its possible it will change the exhaust note slightly

[carsebuco]

No knowledge on tuning or mapping here. I'm currently running on stage 1 91 after months of 93 and it feels so slow... So I figured I want to give E85 a try. From what I've read in this thread, it can work with no issues or just derp all over the place... Should I bother changing over hoping for the best?

[pym19109]

A stupid question from a noob.
Can I run standard oil change interval while run e85 ?
or better to change it twice ?

I am running shell helix ultra 0w-30 about 2500 miles.

[steve99]

Originally Posted by pym19109

A stupid question from a noob.
Can I run standard oil change interval while run e85 ?
or better to change it twice ?

I am running shell helix ultra 0w-30 about 2500 miles.

Hi if this is the oil your running

http://www.shell.com/motorist/oils-l...tra-0w-30.htmlhttp://www.shell.com/motorist/oils-l...tra-0w-30.html

That oil is only SL rated and hence it. May not be e85 compatable. You need a rating of SN to be assured of e85 compatability.

If thats your oil swap ot out as sonn as possible for an SN rated oil, or one that the manufacturer specificly states is e85 compatable

Like

http://www.shell.com/motorist/oils-l...-sn-5w-30.html


The SN rating is what you need.

For change interval yes twice as offten is safe, but if you get oil analysis done and all looks ok then you could go bsck to standard change interval with a suitavle oil

[pym19109]

Originally Posted by steve99

The SN rating is what you need.

For change interval yes twice as offten is safe, but if you get oil analysis done and all looks ok then you could go bsck to standard change interval with a suitavle oil

Thank you very much Steve!
i found castrol edge 5w-30 C3 with a promotion buy 4L free 1L.
i will change it soon.

[jz_JDM]

Hey! So I just switched to e85 today, and I followed all the steps, however I'm my LTFT is still fluctuating around -12.5%. I was wondering if perhaps I did something wrong in the process, or if there is something I could do to correct this, as it seems as if it shouldn't be this high.

[steve99]

Originally Posted by jz_JDM

Hey! So I just switched to e85 today, and I followed all the steps, however I'm my LTFT is still fluctuating around -12.5%. I was wondering if perhaps I did something wrong in the process, or if there is something I could do to correct this, as it seems as if it shouldn't be this high.

Hmmm -12% ltft is a little high but if your E85 is low ethanol content some stuff in USA is now around 50%. Combined with the probably 10 litres of residual petrol in tank on first fill that ltft of -12 is probably correct.


low ethanol content will see negative fuel trims
high ethanol content above about E75 will see positive


Just take it a bit easy till you fill with E85 again this should see the fuel trims get much less negative.

[HLHachiRoku]

Originally Posted by jz_JDM

Hey! So I just switched to e85 today, and I followed all the steps, however I'm my LTFT is still fluctuating around -12.5%. I was wondering if perhaps I did something wrong in the process, or if there is something I could do to correct this, as it seems as if it shouldn't be this high.

Noticed you're from AZ. There is no E85 in arizona any longer. Unless you are buying the drums and pumping it at your house. So you will always have the negative trims like that. AZ has e51-70 roughly now, called flex fuel at the pumps, might see a bit higher but unlikely. Any station listing they hve e85 is lying to you or still has it mislabeled. AZ legislature last aug passed this law sadly, we got screwed. You can still run the e85 tune but it wont be as good, the ethanol content ive noticed on this side of town, west side, sits around 53-64 usually. Ive retuned for it and have had great results so far, more data logging today to see how its doing.