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

[thambu19]

Interesting! From the exhaust note I thought this must have been an unequal one... I am amazed how good a job the OEM have done with the headers and intake to make them flow so well even stock. Perhaps the real advantage with catless headers that we can run them leaner/hotter and gain more power at the peak.
Sorry Ive been away for a few months. Work was nuts with two programs being launched almost simultaneously.

[tmichel]

Don't know exactly where to post this but have had the car sitting for about 3 weeks while on holiday and went to run it today and it is running like a hairy goat is running on E85 with an OFT tune? Have re-flashed but still having same issue , could it be gummed up injectors ? any suggestions ? please help ?

[steve99]

Originally Posted by tmichel

Don't know exactly where to post this but have had the car sitting for about 3 weeks while on holiday and went to run it today and it is running like a hairy goat is running on E85 with an OFT tune? Have re-flashed but still having same issue , could it be gummed up injectors ? any suggestions ? please help ?

unlikely, E85 is a great solvent.


Unless you left the fuel cap off it wont absorb water as fuel tank is sealed.


im not sure how hairy goat's run :-) , but if you logged using oft it might help


log at least


AFR
commanded AFR
LTFT
stft
IAM
ignition timing
engine load
flkc
fbkc
RPM
throttle

[tmichel]

Originally Posted by steve99

unlikely, E85 is a great solvent.


Unless you left the fuel cap off it wont absorb water as fuel tank is sealed.


im not sure how hairy goat's run :-) , but if you logged using oft it might help


log at least


AFR
commanded AFR
LTFT
stft
IAM
ignition timing
engine load
flkc
fbkc
RPM
throttle

I think I have found the problem , RATS, they have chewed through the air filter and some has got into the air sensor , now got code PO102 ?
tried cleaning sensor ,does anyone know if there are 1 or two fine wires in the sensor because if 2 then I have broken 1

[steve99]

Originally Posted by tmichel

I think I have found the problem , RATS, they have chewed through the air filter and some has got into the air sensor , now got code PO102 ?
tried cleaning sensor ,does anyone know if there are 1 or two fine wires in the sensor because if 2 then I have broken 1

haha, thats the second guy thats has rats\mice chew through air filter, then bits clog maf or gey stuck in throttle body.

im not 100% on the fine wires but i suspect it supposed to be one, and coupled with p0102 maf circuit low it looks fairly certian connection to maf or maf is a problem. only clean maf with spray maf cleaner not compressed air or brush.

[tmichel]

Originally Posted by steve99

haha, thats the second guy thats has rats\mice chew through air filter, then bits clog maf or gey stuck in throttle body.

im not 100% on the fine wires but i suspect it supposed to be one, and coupled with p0102 maf circuit low it looks fairly certian connection to maf or maf is a problem. only clean maf with spray maf cleaner not compressed air or brush.

Car all back to normal now thanks for the help Steve , for future reference there are 2 hot wires in an 86 MAF managed to pick up a second hand one for $50.00 ,better than the $331.00 wanted by Toyota, new air filter fitted as well, hopefully nothing more stuck in throttle body

[thambu19]

@steve99 and others...
Have you guys noticed a significant improvement in performance with E85 over 93 Octane?
I have not. Not sure if it is because I am running significantly richer at 10.5AFR instead of 12.5AFR. I need to rescale perhaps.
Do you guys recommend adjusting the load limit or the MAF scaling? If load limit I got to make the limit smaller. If MAF I will need to bring down the Airflow vs Same voltage. Which one is better. My Fuel trims are normal within +10% now. Id like to push the AFR to 12.5 and see how it performs before concluding E85 = 93 octane.
One other thing I want to do next is compare the Intake/Exhaust cam timings between E85 EL cal Vs 93 Cal vs Stock cal. I am running stock exhaust throughout so the cam timings should be identical for 93 vs E85.

[steve99]

Originally Posted by thambu19

@steve99 and others...
Have you guys noticed a significant improvement in performance with E85 over 93 Octane?
I have not. Not sure if it is because I am running significantly richer at 10.5AFR instead of 12.5AFR. I need to rescale perhaps.
Do you guys recommend adjusting the load limit or the MAF scaling? If load limit I got to make the limit smaller. If MAF I will need to bring down the Airflow vs Same voltage. Which one is better. My Fuel trims are normal within +10% now. Id like to push the AFR to 12.5 and see how it performs before concluding E85 = 93 octane.
One other thing I want to do next is compare the Intake/Exhaust cam timings between E85 EL cal Vs 93 Cal vs Stock cal. I am running stock exhaust throughout so the cam timings should be identical for 93 vs E85.

you must have the altered 02 scaling in tune to read that rich ? yes if your running 10.5 afr at higher rpm that's way too rich and will reduce power, should be in early 12 afr.


maf rescale would be best, just use a consistent source of E85.


from memory the cam timing stage 2 e85 and 93 are the same for EL header




should look something like this


http://datazap.me/u/steve99/e85-log-...13-15-16-26-29




.

[thambu19]

Originally Posted by steve99

you must have the altered 02 scaling in tune to read that rich ? yes if your running 10.5 afr at higher rpm that's way too rich and will reduce power, should be in early 12 afr.


maf rescale would be best, just use a consistent source of E85.


from memory the cam timing stage 2 e85 and 93 are the same for EL header




should look something like this


http://datazap.me/u/steve99/e85-log-...13-15-16-26-29




.

Hey this doesn't look like a pure OFT E85 EL cal. The KCA is over 9 at peak power whereas the OFT calibrations limits KCA to less than 6 there.

When I compared the cam timings of Stg2 EL E85 to Stg1 93 Octane, the cam timings were very different. Id say if I was using a stock header, I should use closer to stock cam timings or closer to Stg1. Stg2 should be for those running catless headers.

The Base timing B for Stg2 EL E85 was more advanced than stock timing by roughly 5deg. See below. This sort of makes sense and sort of doesnt. It is at the lower speeds where we can take full advantage of E85's knock resilience and at the higher speeds the combustion should be closer to best timing already. I see 7 deg added at peak power but only a few deg at lower speeds. hmmmm

Overall I think there is a lot of room for improvement if someone has a dyno to play around with.

I might copy the Stg1 93 octane cam timings over to E85 cal and try it out

[thambu19]

Actually ive done nothing to the tune other than the gas mileage display fix. I hope I dont have a blown CAT and high back pressure causing lower airflow. When I compare my MAF voltage to yours my MAF voltages are lower showing less airflow. The Air temps are about the same.

[thambu19]

@steve99
Are you running a custom E85 tune? Different cam timings?

[steve99]

Originally Posted by thambu19

@steve99
Are you running a custom E85 tune? Different cam timings?

yeah mines pretty modified.


shifted 4 degrees of timing from base B to knock correction but overall timing same


custom maf scaling
altered load limits


cam timing is for UEL catless header


ol/cl fuel table is a bit leaner




yep their not much difference in 93 to E85 timing at lower rpm its mainly mid/upper rpm where the timing is added so that where you notice the power.

[thambu19]

Originally Posted by steve99

yeah mines pretty modified.


shifted 4 degrees of timing from base B to knock correction but overall timing same


custom maf scaling
altered load limits


cam timing is for UEL catless header


ol/cl fuel table is a bit leaner




yep their not much difference in 93 to E85 timing at lower rpm its mainly mid/upper rpm where the timing is added so that where you notice the power.

Thanks! Are you running UEL headers though? I thought you were bone stock except for drop in filter and E85.

I will need to play around with this tune quite a bit. Not happy at all. Loved the 93 octane one.

[thambu19]

@steve99 Would you able to send me the recording file you use to record via tactrix? I like how you have so many more important parameters to look at.