2 Rockets Compare Dobeck Performance AFR Plus to TuneECU - Long Post

[Idaho Red Rocket 3]

The Dobeck Performance AFR Plus uses wideband O2 sensor and goes into closed loop in zone 2 and zone 3.

 

[warp9.9]

Ok I was not sure if it used one or not. Since it does it is more accurate depending on the accuracy of the sensor compared to a multispectrum gas annylizer. I think it just boils down to the wide band O2 sensors on the market are not as accurate as the full blown gas annylizers that dynos use.

 

[barbagris]

Now add the auto tune feature to it and it uses a wide band A/F sensor wich will monitor and adapt as you ride its only down fall will be how accurate is the wide band sensor. A wise tuner from down under pointed out how these sensors can be off some.

This is a major issue - and one that is misunderstood by so many. Wayne Tripp was very good to explain to me the limitations of retail AFR sensors. And he really made sure I understood the route I was looking at. I had no choice - as there is no alternative for me.

The simple fact, as Scott points out, is that the calibration of the "retail grade" wideband sensor WILL go off over time (I assume "use" rather than time). This can be tested on the PC5/AT - but I don't know if it can on the DoBeck.

THIS COULD RESULT in the O2 sensors actually measuring wrongly. i.e any display would "suggest" to you, that you are running at (say) 14.1 - where as you're actually at 13.8 or 14.5 - if analysed using a DYNO GRADE O2 sensor - which I'm told are 250-300USD a pop. Dyno grade sensors also "go off" but a good dyno-god will know this and only use correctly calibrated ones.

It's why I analyse (attempt to understand given I know what has changed) and then commit (and occasionally manually adjust) trims on the PC5. I know that I can simply remove the A/T box and have a "bespoke" base tune in the PC5. In fact this is my aim. I just seem to keep changing things so need to adjust. But the minute my AT trims are negligible against the committed trims map in the PC5 - off it comes.

My ideal situation would be to pass my PC5 data to a pure TuneECU hex map. Invisible. If I can get my hands on the right statistical software (I know what I want, as I used to sell it, but it's expensive and not crackable) - I will.

Is there a STATISTICIAN IN THE HOUSE?

 

[steve59]

You guys mean business!

 

[MarvinM]

Can someone remind me why the Oxygen sensor is turned off in most of the custom TuneECU tunes?

Thanks,
MarvinM

 

[warp9.9]

Because it is a narrow band sensor and if it were not turned off every bit of fuel adjustments you made in the lower areas or any area that has 14.5 to 14.57:1 A/F ratio in the map would be leaned out as the computer reads the O2 sensor reading, finding it not what the pre programed ratio set in the map. Hope this is not confusing?

 

[barbagris]

This is a major issue - and one that is misunderstood by so many. Wayne Tripp was very good to explain to me the limitations of retail AFR sensors. And he really made sure I understood the route I was looking at. I had no choice - as there is no alternative for me.

The simple fact, as Scott points out, is that the calibration of the "retail grade" wideband sensor WILL go off over time (I assume "use" rather than time). This can be tested on the PC5/AT - but I don't know if it can on the DoBeck.

THIS COULD RESULT in the O2 sensors actually measuring wrongly. i.e any display would "suggest" to you, that you are running at (say) 14.1 - where as you're actually at 13.8 or 14.5 - if analysed using a DYNO GRADE O2 sensor - which I'm told are 250-300USD a pop. Dyno grade sensors also "go off" but a good dyno-god will know this and only use correctly calibrated ones.

It's why I analyse (attempt to understand given I know what has changed) and then commit (and occasionally manually adjust) trims on the PC5. I know that I can simply remove the A/T box and have a "bespoke" base tune in the PC5. In fact this is my aim. I just seem to keep changing things so need to adjust. But the minute my AT trims are negligible against the committed trims map in the PC5 - off it comes.

My ideal situation would be to pass my PC5 data to a pure TuneECU hex map. Invisible. If I can get my hands on the right statistical software (I know what I want, as I used to sell it, but it's expensive and not crackable) - I will.

Is there a STATISTICIAN IN THE HOUSE?

Does anybody out there know how to use THIS ?

 

[RocketRoger]

Detail is important to me. It enlightens my igornance.

Appreciate the detail.

 

[bill widrig]

for me...ignorance is bliss

 

[albertaduke]

Does anybody out there know how to use THIS ?

certainly not me !! all this is alien language guess I am to old to care