Motty AFR tuner - the PowerCommander killer
 

Hi!
Here (in estonia) we have a bike tuning shop www.dragbike.ee who specialises in rebuilding bikes to extreme.
So what they say, when it comes to modding, is usually true.

They are offering something called AFR tuner, which is 3 times more expensive than PowerCommander, but they claim this it is much better because when it is installed and tuned for your bike, it will keep itself automatically tuned nomatter what you do with your bike later. For example, you are changing your air filter, you are fitting the stage II filter, removing the snorkel, fitting another exhaust etc etc. - and the AFR keeps adjusting itself back to "normal" mode so the AFR ratio is always correct.

They (dragbike dudes) say that for example, on a longer trip, when roads are dusty and air filter doesnt let much air in anymore, AFR automatically adjusts to it, so the mixture wont be too lean (correct me if im wrong here, if not enough air is let in, then it will be too much fuel, correct?).

Here is my question - has anyone ever tested something like this? I have a 07 model XT660R and my first thought was - powercommander cannot be fully tuned because of my 07 ecu, what about this AFR Tuner thingy?
I bet Kev has some kind of answer to this, but if anyone else has something to share, pelase do so.

Chap,

The new recently released PC5 will do the same at approx �275 + a dyno tune, but is only suitable for fuel injected bikes.

Have a read on the Dyno Jet website abt the PC5 - long overdue but will be fitting one very shortly...

WB :)

but as i understand, it is for 2009 and up models only?

It will work fine from 07 onwards with 02 sensor. PCV with auto tune.

Kev you have already tried it?
But how is PC5 compared to PC3 with the 07 version, since PC3 cannot be fully adjusted because of the ECU. Same with PC5?

I have not tried it a PCV with Auto Tune, but have been following the Raptor forum's very closely to see the gains of the new system.

A PCV with Auto tune will be able control of the whole fuelling system on a 07/09 XT660X/R, the Auto tune replaces the XT's narrow band O2 sensor with a wide band O2 sensor to take control of the fuel mapping. The 07/09 XT660X/R ECU's are inter changeable I know this for a fact.

A PCIII does not have Auto tune.

I don't think you understand that a PCV & Auto Tune are two separate devices. A PCV by it's self can not tune the bike automatically you would need to build a fuel map on the dyno the same way as the PCIII is done. Add a Auto Tune to the PCV & the Auto Tune will build a fuel map for you while you ride. The Auto Tune does not work on the PCIII as there is no Can Bus protocol.

http://www.dynojet.com/support.dynoj...VUserGuide.pdf

http://www.powercommander.com/downlo...des/AT-200.pdf

http://i25.photobucket.com/albums/c5...l/IMG_1802.jpg

I installed my 1st PCV today on a GSXR750 -08 model.

So 1st off, the PCV can work on older model bikes, as long as the connecter are the same as the new model bike. I am convinced that you can make the PCV work on any model XT660. The older models without the O2 sensor will require that you drill a hole in the header pipe and have the bug welded into place. You get the bug with the auto tube unit so most engineering shops can help you with the drilling and welding. Note the Welding needs to be airtight.
There are a lot of new features on the PCV that you don�t get on the PCIII. For example, the unit I work with on the GSXR has engine temperature and gear selection input and some even come with input to detect intake air pressure and so forth. This enables you to run a fuel injection map per gear instead of one map for all gears. On a lot of the modern bikes the ECU delivers different amounts of fuel and ignition timing for each gear and with the PCV you can map the fuel to address problems in specific gears. You can even go as far as making a different map for each gear per cylinder. In other words if you have a 4 cylinder bike with 6 gears you can build 24 different fuel maps and the PCV will know when to use which map without rider input.

Throttle calibration is also a lot better and another feature I like is that you don�t need the bike to be running or use a 9v battery to power the unit. It draws power directly from the USB port now and you can programme the unit without the bike running.

The auto tune unit is another great add on, but in the wrong hands it can cause damage to the bike. The PCV can now increase fuel delivery by up to 200% where the PCIII could only do 100%. If you get things wrong you can drown the motor and cause serious damage. When you run the autotuner, you better get it set up by someone who knows how it works

no my question actually was, would the PC5 with autotune be less adjustable with my 07xt than for example, with a 05xt? You did change your 07 ecu to a 05 one, is it something I should do If i would want to get the most out of PC5+autotune?

There would be no need to change your 07 ECU, the PCV with Auto will do the job. When I changed mine there were no PCV's on the market.

Quote:

Originally Posted by Freez The auto tune unit is another great add on, but in the wrong hands it can cause damage to the bike....

What setting up does the auto tune need?