Openflash FLEXFUEL OTS Tunes!

[Yoshoobaroo]

Originally Posted by steve99

no
with the flex fuel tune the ecu is expecting a signal into the ecu from the flex fuel kit/sensor that tells ecu the current ethanol percent. dont run the flex tune unless yo have flex sensor kit installed and connected to ecu

I think what @pancake meant is if you can tun the OTS flexfuel map permanently, or of it needs an e-tune. Not whether or not you need the hardware.


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[Yoshoobaroo]

Originally Posted by steve99

the evap pressure sensor is part of the emissions control system so it will be disabled when you run a flex kit input to the evap . This system is not even fitted to out cars in Australia, so appears their would be no downside, other than you may have a "fail/not ready " indication on an emmissions test.

connecting to the rear 02 disables the rear o2 sensor and this is used by ecu for cruise fueling. this may result in slightly worse cruise fuel economy. It will also cause a fail/not ready indication on emissions teats.


the evap connection is generally prefered, although the rear 02 is slightly easier to connect to, hence rear 02 kits are generally a little cheaper as you dont need the ecu harness, but you can cut and splice wiring if you dont want to buy the ecu harness its not that hard.

Thanks for the insight! Makes sense!


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[steve99]

Originally Posted by Yoshoobaroo

I think what @pancake meant is if you can tun the OTS flexfuel map permanently, or of it needs an e-tune. Not whether or not you need the hardware.


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OK,

The flex tune should run fine, but like any tune its worth logging it initially just to make sure, im not sure if shiv is charging for flex tunes and the price may include logging and revision

[Sojhinn]

How's your cold starts with the e85? So far with pretty much all e85... It's not always the best.


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[steve99]

Originally Posted by Sojhinn

How's your cold starts with the e85? So far with pretty much all e85... It's not always the best.


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adjust your cranking injector pulse widths or the e% to cranking pulse interpolation table in flex tune

[pancake]

Originally Posted by steve99

OK,

The flex tune should run fine, but like any tune its worth logging it initially just to make sure, im not sure if shiv is charging for flex tunes and the price may include logging and revision

Right, that's what i meant -

I know with the SBD turbo, there's an OTS tune that Shiv provides, but you are urged to get an e-tune as soon as possible. So that doesn't seem to be the case with the Flex Fuel kit, although it seems to be encouraged (or at least post some logs)

thanks

[infinitewhiskey]

Originally Posted by slowest86

whats the best way to send that to you? My datalogs are good And I know I installed the flex fuel kit correctly, its just this idol manly thats causing me problems.

How did you log your data? Was it just normal driving for a few minutes or a few pulls?

[choiboie]

I just bought a flex kit from a group member. Do I need a flex fuel map from Shiv to install? Before I do an e tune?


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[slowest86]

Originally Posted by choiboie

I just bought a flex kit from a group member. Do I need a flex fuel map from Shiv to install? Before I do an e tune?


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I can't even get a definition file from him so ican make adjustments.

[choiboie]

Originally Posted by slowest86

I can't even get a definition file from him so ican make adjustments.

i just got a reply back from him
he had me sent him a copy of my original file
hopefully he sends me a flex fuel base map

[Young_86]

When I purchase this oft flex fuel kit it comes with ots tune , will I need something more for t or is that all I need to do is flash the car to the flex fuel tune?

[steve99]

Originally Posted by Young_86

When I purchase this oft flex fuel kit it comes with ots tune , will I need something more for t or is that all I need to do is flash the car to the flex fuel tune?

you will need to fit the flex kit electronics and fuel lines and flash the oft flex fuel tune. you will need t contact oft guys and they will send you the correct flex tune for your car

[Young_86]

I just skipped thru everything lol sorry but I have a question I have oft stage 2 el headers and thinking of going e85 with the flex fuel kit provided by shiv on his website , is there any charts of the gains with stage 2 el e85 tune ?

[phrosty]

Originally Posted by Young_86

I just skipped thru everything lol sorry but I have a question I have oft stage 2 el headers and thinking of going e85 with the flex fuel kit provided by shiv on his website , is there any charts of the gains with stage 2 el e85 tune ?

Yep, there are such charts.