i had a chance to start playing with the pcv and the auto tune today. there are a few things that dynojet left out of the instructions (or could have made more clear) so i will post some of my own instructions later this week to help out those of you about to install the system.

initial thoughts:

* this setup is pretty cool!! it works much better than the previous power commanders (at least so far) and incorporates some nice features. you can set it up to map each gear independently (with the proper wiring - more on that later). also, by adding a switch you can run two different maps and change them on the fly.

coming soon:

* i have designed a simple "plug-n-play" bracket and switch that can be used for flipping between maps (or activating the auto tune feature if equipted).

* i designed a power shifter kit that will be an easy add-on and look like it was designed for the bike (which it was).


i will post more tomorrow as i get more into the development.

Sounds very promising Ken. Thanks for your research and development. It's very much appreciated.

evoluzione wrote:
Hi Ken,

Do I get this right; the O2 sensor is begin disconnected when using PCV + Autotune?

Would you be so kind to explain that to me (and us)
As far as I know, the O2 sensor gives his readings to the ECU. Where does the PCV fits in when the autotune will give his readings to the PCV?

Does the PCV gives the 'instructions' to the ECU? Or how exactly doe sthis work?

Disconnecting the O2 sensor, wouldn't that give 'false readings' to the ECU?

Thanks in advance to clarify

(just trying to understand)

*- DiMMaX out -*

Really looking forward to hearing from your findings with regards to the PCV + Autotune. My intention has always been to open up the exhaust system but dare not do it till there is a thoroughly tested fuel modifying system to go with it; in my anxiety to get things done, I have removed the filter cone and run with no filter (just the stainless mesh), but the delay in the appearance of the PCV-AT is bugging me big time because I know I'm running weak and don't want to buy a filter just for the sake of peace of mind. FYI I run my PCW 1500 LR with short bell mouths from new, no filters whatsoever as recommended by the manufacturer, so not too bothered by that. Where I live the weather is rather humid (similar to Seattle), so no dust, sand or other stuff you might find in dryer or desert type climates.

I did read the instructions from Power Commander and they are just "Crap" I believe they had a Max for a couple of hours, took a few pics and that's it. I will of course go for one of your PCV-AT's with YOUR installation manual when you are done; just hope you have enough units so as to send some to us, the other side of the "Big Pond"


And DiMMax, if you get a PCV without Autotune you don't use the O2 sensor, but with the Autotune you do, and it is a wide range O2 sensor that comes with the kit and must be mounted where the original sensor was. If you get an "X" pipe or any of the UFO options, they provide a threaded bung where you can install the sensor; with the PCV, UFO Tuner or PCIII you don't use the O2 sensor since the maps are fixed and you can modify them manually using your pc and normally on a dyno with exhaust gas analyzer readings; in that case, you should receive a threaded plug to install in the place of the O2 sensor.

With the Autotune you get the wide range O2 sensor and it is very important in this case to remove or block the AIS system so the readings sent to the AT module are consistent with the mixture coming out from your engine.

Spanish Flyer

Nice Work Ken!

What is your price for the PCV + Autotune for forum members?

Thanks

Rick

DiMMaX wrote:when using a pcv, the o2 sensor is disconnected from the system (dynojet even includes a small plug-in electrical circuit that sends the right signals back to the ecu so there is no "check engine" light). the reason for removing the o2 sensor is that it would interfer with the programming you are doing. in other words, let's say you program the pcv to enrichen the area from 2%-20% throttle and 2k-4.5k rpm by 10%. if the o2 sensor where still hooked up, it would immediately try to reprogram the fuel curve to eliminate the extra 10% fuel you just added.

now, if you add the auto tune, it supplies a bosch wide-band o2 sensor (the stock sensor is a narrow-band) that installs in place of the stock sensor. the way the auto tune works is that you pull up a table on you laptop and input the desired air/fuel ratio at all points throughout the rev range (0-10k rpm, 0%-100% throttle). the pcv then reads that table and creates a second table in memory as you ride the bike. this second table is made up of "trim" figures that modify the base fuel table to try and give you the desired air/fuel ratio you input. in other words, as you ride the bike, the pcv & the auto tune are working together to build a custom fuel table for your bike's configuration.

as to how the pcv gives the instructions to the factory ecu, the pcv intercepts the signals going from the stock ecu to the fuel injectors. it then modifies the signal and sends the modified signal to the injectors. suppose you are riding along at 4k rpm and 15% throttle and felt you wanted the bike to run a little leaner in this area (for better fuel economy). let's say you would program in a value that reduced the fuel at that point by 5%. so if the original signal was 5 milliseconds that came from the stock ecu, the true value that would reach the injectors is 4.75 miliseconds (5 - 5% = 4.75). the reason the pcv works this way is that the stock ecu does all of the other complicated calculations involving inputs from the t.p.s. (throttle position sensor), i.a.t. (intake air temp.), e.c.t. (engine coolant temp.), m.a.p. (manifold absolute pressure), etc. to come up with the base injector signal so no matter what altitude or temperature you ride in, the fuel table should be consistant.

hope this helps.

Thanks a lot for this more than satisfying explanation
Now at least I know what's going on when I'd install the PCV+AT

Interesting to know that Dynojet has added the module to connect to the stock O2 sensor.

One thing though:

It's clear to me what the AT does; its creating a custom mapping based on your driving and it stores it into the PCV.
Does this mean you have to 'select' and 'enable' the custom mapping after your ride? Or will you be able to use it on the fly?
In other words; can you use the AT while you ride? Meaning it will adjust your A/F ratio while you're on the bike and apply it immediately?

Thing is that I don't want an extra button to select between the available mappings. The reason for me to buy the AT is to have it adjusting my A/F ratio on the fly.

Oh, and Spanishflyer, thanks to you too
I do not have the X-pipe, but I do have an alternative, similar to the X-pipe. I have indeed removed the catalyst and replaced it with a collector. Very similar to the X-pipe but not quiet the same
In fact, the only thing they have in common is getting rid of the cat
My pipe has the connector for the O2 sensor as well. Since the AT is replacing the stock 02 sensor, I can reuse the connection.

Thanks again!

*- DiMMaX out -*

Cool stuff!

FYI - even the PCIII USB had these features, except for the auto-tune. Have the dual map switch, speedhookup, quickshifter, ignition module and LCD display installed. Works like a charm.
DYnojets quickshifter needs a little modification of is want to go with the push type sensor (shortening the threads).

An install kit for the new VMax would be killer!

DiMMaX wrote:the auto tune creates and constantly updates the map in one of the "storage cells" where the base (starting) map is in the other storage cell. you do not need a button - just simply set it up in the software and it will always run on the auto tune map.

evoluzione wrote:
GREAT! That's exactly what I wanted!
Thanks for clarification

Can't wait for the PCV+AT to arrive

*- DiMMaX out -*