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

[steve99]

Originally Posted by kchar

I believe it's just the regular rev limiter because my LC delta is set to 2600 and i'm not reaching the 5k. My Flat foot is set to 0 so that shouldn't be on.

so your car won't rev over 4600 in gear ?

do you have a cel light on dash ? has it gone into limp home mode ?


tables should look like this (this is petrol map though

[kchar]

Originally Posted by steve99

so your car won't rev over 4600 in gear ?

do you have a cel light on dash ? has it gone into limp home mode ?

Right, its odd. My car is running great no lights, there are no issues with revving once I'm on the road. Just when I'm stationary.

Yeah my fuel cut off is just like that.

[steve99]

Originally Posted by kchar

Right, its odd. My car is running great no lights, there are no issues with revving once I'm on the road. Just when I'm stationary.

Yeah my fuel cut off is just like that.

Check you Launch Control RPM delta maybe its 3600 not 2600 ?

thats the only one that should be active when car stationary in neutral and clutch released


Hang on I think I remember their is a 400 rpm change from when clutch depressed to released

if LC Delta set to 2600 and redline rpm is 7600 then with clutch in it may be rpm limited to 4600,

try it in neutral with clutch released it mat then be 5000 like its supposed to be.

[kchar]

Originally Posted by steve99

Check you Launch Control RPM delta maybe its 3600 not 2600 ?

thats the only one that should be active when car stationary in neutral and clutch released


Hang on I think I remember their is a 400 rpm change from when clutch depressed to released

if LC Delta set to 2600 and redline rpm is 7600 then with clutch in it may be rpm limited to 4600,

try it in neutral with clutch released it mat then be 5000 like its supposed to be.

Yup I double and triple checked. I just copied all the tables I changed to a fresh 2.061 in hopes it was some fluke lol. Just got back in, I think you may be right on that change though.

[kchar]

Originally Posted by steve99

Check you Launch Control RPM delta maybe its 3600 not 2600 ?

thats the only one that should be active when car stationary in neutral and clutch released


Hang on I think I remember their is a 400 rpm change from when clutch depressed to released

if LC Delta set to 2600 and redline rpm is 7600 then with clutch in it may be rpm limited to 4600,

try it in neutral with clutch released it mat then be 5000 like its supposed to be.

So turns out the 400 rpm drop is there in neutral (clutch in or out) and in first the normal LC delta is where it was set to in the tune.

[Firesnake]

I just flashed back to 91 stg. 2 El from the stg 2 el e85, not sure if this is normal:|
http://www.datazap.me/u/firesnake/ma...1?log=0&data=1

Had a code that I was running rich, and KC learned averages 3-8 on throttle. Should I be worried?

[DC2R]

Originally Posted by steve99

its possible their are some tables in ECU to adjust this, but no one has bothered to test.

you economy will be aprox 25% worse on E85 than on petrol but the fuel is cheaper.

Any ideas if readout is theoretically accurate as a representation of what you would be getting if running 93 while actually running E85?

[s2d4]

Originally Posted by DC2R

Any ideas if readout is theoretically accurate as a representation of what you would be getting if running 93 while actually running E85?

Why would anyone want to do that?

[steve99]

Originally Posted by DC2R

Any ideas if readout is theoretically accurate as a representation of what you would be getting if running 93 while actually running E85?

I dont quite understand what your asking.

AFAIK the mpg display is calculated by the ecu using injector pulse widths for pi and pressure for the di.

The oft e85 tunes adjust the pi injector scaling up 30% and the di pressure multiplier up 30% to get the e85 fueling in the ballpark so your not running massive fuel trims like 30%.
It appears the ecu calculation for mpg does not take into account those paramaters in it fueling calculation hence the calculation is incorrect by about 30%. Their may be parameters in ecu to correct tgis but no one has bothered to extact them.

[Td-d]

Has anybody actually tried using the table cryptically called "Table_Fuel_Multiplier_Display" ?

[steve99]

Originally Posted by Td-d

Has anybody actually tried using the table cryptically called "Table_Fuel_Multiplier_Display" ?

Good to see your still arround.

yes should try that out, seems it will only adjust fuel calc for DI as its based on pressure, so hopefully the PI is taken care of somewhere else or already compensated for.

[cuddefred]

Hi Steve, I've no idea how it was done but when I ran an E85 Ecutek tune on my car the mpg fuel reading was accurate so there is obviously some way of doing it for the intelligent ones of you out there

[stokeless]

I finally jumped on the oft, loaded up my first flash last night, stage 1 v2.0 91oct... put on about 8-10 miles, no wot though. How long should I be driving before the tune fully seats in... I searched and did a lot reading on the form regarding this but it appears there is no definite answer. some says a few days, weeks or a few miles after the re-flash. I followed all the tips on page one after the re-flash. some says to monitor the fuel trim and once stabilized, you are good. But I am a newbie / dummy, can anyone explain how I should be reading the fuel trim? how to better understand? I plan on going stage 2 el E85 once my tank is low enough.

[Koa]

Originally Posted by stokeless

I finally jumped on the oft, loaded up my first flash last night, stage 1 v2.0 91oct... put on about 8-10 miles, no wot though. How long should I be driving before the tune fully seats in... I searched and did a lot reading on the form regarding this but it appears there is no definite answer. some says a few days, weeks or a few miles after the re-flash. I followed all the tips on page one after the re-flash. some says to monitor the fuel trim and once stabilized, you are good. But I am a newbie / dummy, can anyone explain how I should be reading the fuel trim? how to better understand? I plan on going stage 2 el E85 once my tank is low enough.

There is a definite answer. Long enough for the system to calibrate and read inputs across all MAFV/Load buckets. Which means that there is NO set time.