FLEX FUEL INPUT AND SETTINGS

[RABOOST]

Hi K tuner, Just purchased a unit and I cannot seem to find the "FLEX FUEL" settings on the software. I'm using it on a 2003 Accord harness (K24A4 engine) with the appropriate 05 ECU. I started with the KTUNER PRB Code Base map with boost support by the way. Im also using a OEM GM flex sensor.

I would also like to know which ECU pin I can use as an input for flex fuel sensor and can I use a PLX WIDEBAND as an O2 source for my close loop operation.
Would I also still need to use a flex fuel Analyzer or can I calibrate it thru Ktuner, thanks

[KTuner]

You will need a converter to convert the signal. That feature has not been released as final, but will be shortly.

[RABOOST]

Thanks for the reply, as a "GUY" we are wired to think in simple terms, could you please tell me EXACTLY the brand, part number, ETC of the said converter I would need?

By the way, can you also tell me which ECU PIN or PINS will likely be used for this input so that way I can already finish up my wiring and have that Pin or Pins "READY" for it later once the software update is released. thanks again.

[KTuner]

You need a 0-5v analog output at the current moment. Any kit that can handle that. I can't recommend one for you.

They're the same inputs as the wideband allows for, found in the preferences.

[RABOOST]

A follow up question about the ECU PIN input, If the analyzer will be using the same input as the wideband input for example PIN E14, does this mean that a separate wideband input signal can no longer be used since the flex sensor is using that input??? Basically I want 2 separate INPUTS: One for wideband and another for just flex sensor readings, can this be possible to simultaneously work together?

I would like to be able to datalog and use the flex sensor analog readings and use an aftermarket wideband like PLX as my main O2 sensor for all close loop operation.
And finally do we need to wire A 2.4 k ohm resistor needs to be wired between output and positive wire just like Hondata recommends on the S300? Thanks again.


Can you please check the bottom link if this flex unit will work.

http://zeitronix.com/Products/ECA/Ethan ... Sensor.pdf

^^^ This is a Zeitronix unit with a 0-5v analog output, can you please read the factory description to see if this will be compatible?
I have used this on Hondata S300 platform in the past with great success. Thanks

[KTuner]

There are three analog inputs in the list I mentioned, two of which are available on all of these ECUs. If you have two sensors you're monitoring and there's two inputs. One for each sensor.

An analog input will accept any 0-5v analog signal. I can't recommend a sensor kit for you.

[RABOOST]

OK I guess I will cross the bridge when I get there, In the mean time I will have pin E14 ready for the E85 Flex input while I wait for the release of the new software update with flex capability, I do have one request when you write the flex parameters, Please DO NOT give it "GLOBAL" fuel and ignition compensation only!

Please also give the option to retard and advance timing based on Boost as well. A low and High boost PWM signal to the boost by gear would also be a nice addition so that way I don't have to turn down boost manually or electronically depending on how much ethanol I have in the tank.

For example, I would want the ignition timing to be the same on part throttle regardless of ethanol content, then once boost kicks in I have the option to either retard or advance timing depending on how much ethanol I have. I hate Hondata's global fuel and ignition trim for E85 because my part throttle timing are perfect with zero to little knock even when using no E85 on my other car using S300, I only really see knock on high loads and boost so that means I don't even need any timing pulled on part throttle at all, BUT Hondata pulls back timing anyways because its based on a GLOBAL fuel and ignition trim. I hope I make sense.

[RABOOST]

I just checked the latest software update and noticed Flex fuel is now ready, my question is this: I would like to upgrade to the latest daughter board so i can use the inputs it offers for an extra $100 plus shipping, would upgrading eliminate the need to buy a separate flex fuel analyzer? This is the whole point of upgrading correct?

[KTuner]

You need a flex fuel sensor, you would no longer need a converter. Details on upgrading will be available on the website soon.

[RABOOST]

I do have a GM flex fuel sensor already in the fuel line and has been there since day one of the build and just waiting for this much awaited upgrade!

The only reason I cannot push more power is because of the fuel octane limitations of 93, but the car has been boosting and running great for about 2 months now. Once I get E85 I will boost to 20 psi