ratincat

http://www.autronic.com/page_files/autotune_feature.htm check that thing out they have one made for the rotary

RX794

I have checked on this "autotune" feature on the Autronic, unfortunately this is NOT a feature available on the rotary ecu setting, this is what I was told from an Autronic dealer.

ratincat

i called them and they are going to include it in the new ecu that they are making and releasing this year

pugg57

can someone please post a little more info on it as i don't seem to be able to get the linked webpage to come up no matter how i try to do so.

moehler

iTrader: (12)

^ It looks pretty interesting. It's basically has a "self-tuning" feature that allows the ecu to tune itself for an optimal AFR.

pugg57

hmm.. that'd be sweet **** what's the cost estimate? can it handle upgraded injectors and such?

ratincat

more details about everything will be releaced in april about the new ecu that will be more rotary compatible (the self tuning will work with the rotary mode. i think you could use this in conjunction with the stock ecu sooo you would not have to do a huge over hull to the rest of the electronics this would control fuel and timing only and the fuel pump engine functions except the omp whitch is what i am worrryed about and would want to use a stock ecu to run along with anythign else that dosent hook up to this

pugg57

wonder if it could be used in conjunction with the PFC (for those of us who made that leap already)

GoRacer

iTrader: (2)

wow, if that thing works i'm in for the group buy.

ratincat

the whole idea of the auto tune feature is that you set your a/f raito at each rpm and it uses the wide band o2 to tune its self to that raito at each rpm


this would be exelent for street tuning no dyno required

yes it would work in conjunction with the pfc but remember that your will have to cut some of the wires out of that harness soo this ecu can perform those functions and the pfc will just run the ones that this cant

pianoprodigy

I've always wondered why something like this wasn't available. Somebody buy it and see if it works.

DCrosby

AEM Allready does this, but it works marginally well on Piston engines, since there is a bit of a margin for error, the issue is that on rotary's the margin for "ooops a bit to lean let me add more fuel" is near 0. Therefore AEM reccomends not using it on rotaries, allthough it's there. It has a sampling rate, how often you wish to check for AFR, and then it automatically adjusts fuel and timing with Widemband, and EGT as reference to tune to desired AFR.

Another note from AEM, is that even if tuned like this, there's no substitute for a professional tuner to come in and tune for power, since all you'll be doing is tuning for AFR.

ratincat

and in rotires is you can get the a/f raito all right at the same right around 11.5 then you can make the power with the timing ajustment

pugg57

hmm... while it sounds like it could be an excellent idea for those road warriors who just want to tack on a few mods and drive like a champ everyday (me now, but i like to know i have power and my car will be sitting pretty in a garage soon ) but unless i hear some really good feedback i think i may just go with AEM on this one and admit that there is no substitute for a good tune

Shad Laws

Hello-

I've used Autronic systems before. We used to use them quite a bit back when I used to run an aircooled Porsche/VW performance shop...

Overall, they are good little boxes. I believe that the technical contact guy's name is Ray Hall, and he's always very helpful (if you don't mind paying for Australian long distance charges... but it's worth it). We used to use the SMC unit - the cheaper one... it did all we needed for our configurations. Look through the SM2 instructions, and it may be possible to use some auxiliary outputs to drive OMP, solenoids, etc... I haven't looked, so I dunno.

I've also used the autotune feature quite a bit. The autotune feature is a good tool for the right user. In other words, if you have no idea what you're doing and turn on autotune and trust its results without much filtering, you're going to have some crappy results. However, if you do the basic shaping yourself and carefully restrict what you allow it to autotune, you can get some fantastic results. Perhaps the biggest plus here is the fact that you don't really need a dyno. In fact, I never used a dyno to tune with Autronic... all you need is some open roads and two people in the car.

If anyone wants some advice on these guys, let me know. Also, if you need the name of a reputable reseller in the US, let me know (not my old company... but another shop that used to sell them).

One useful piece of info: they offer a "weatherproofing" upgrade for a pile of money. The upgrade is a nice thing, but a pain for them to do, so they raise the price to make it worth their while :-). You can accomplish the identical result by taking apart the box and putting a small amount of RTV silicone around the seams...

Take care,
Shad

RX794

The Datalogit people are already working on a self tuning program for the Datalogit/PFC users, no word on how far along they are on this though.

Kevin T. Wyum

The sensor reads the mixture after it's happened. Making changes based on that on the fly under boost is asking to install a new motor. I wouldn't even consider using that feature. The Motecs have it and I don't know of anyone using it on a turbo rotary, I know of some that tried. : ). Otherwise the unit being mentioned might be wonderful but I'd stay well clear of trying to use closed loop under load, the factory doesn't.

Shad Laws

Hey guys-

Having used Autronic and autotune before, perhaps I should clarify what I think you're misunderstanding....

Autotune is NOT full-time closed-loop control. It will NOT change your fuel map at WOT every time you go into boost. Rather, it is a program you can run on a laptop to tune a fuel map point as opposed to manual entry by hand of every location. It is SLOW... if you tune the map really rich, it will slowly turn the fuel down until it is correct... it won't do it in 1 cycle like a real-time closed-loop controller would.

Autotune is essentially like having a hand-tuner who makes awfully accurate guesses as to how to change a fuel map entry... that's all.

Take care,
Shad

HEns

the autotune on a motec doesnt work, never has, for any car.

and the autronic does make awefully accurate guesses, better then a tuner.

anyhow im not going to rant because i dont have any real experience with it.

you should get rice racing to contribute, he swears by it ever since he tested one reacently.

TT_Rex_7

I don't see how a good tuner couldn't make accurate "guesses" better than Autronic?! The results from the auto tuning feature shouldn't be diffrent from a good tuner. If you think about it, it was made by a tuner, therefore whatever decisions it makes was programmed into it by a tuner. Although, if your tuner sucks, it won't turn out as well, but if your tuner is better, your results will become better. Just a thought...

-Alex

pugg57

oh really? now THERE's somethign i need to look into

jspecracer7

If memory serves me correct the Tec III does this as well.