Stock auto box on standalone ems.

[Muffleman]

Is anyone running a stock auto box on a standalone ems ? If so, which one ?

 

I know the AEM can control the auto as can MoTeC. Can you run something like a Link and leave the stock ecu managing the auto shifting ? And will it drive okay ?

 

Reason I ask is that with the Link controlling the ignition, I don't know if the stock ecu does anything like retard at shiftpoints to ease transition. If you then control all the ignition with the Link and the stock ecu managing the shifting, would it drive okay ?

 

With the AEM for example, you can do a lot of fine tuning on the auto shifting.

[JustGav]

Interesting question

 

I'm under the impression that it will just make the shift that little bit more clunky..

[Ryan.G]

The AEM (gems) ECU is the only one, that i know of, that can directly control the auto box. The MoTeC cant 

 

The MoTeC’s have to use the stock ecu to control the box (which I feel is best) and then the MoTeC unit to control the IGN/INJ. Now the reason why the MoTeC can be used with the Auto is because it has a function that is called shift retard. The shift retard function can accept a digital input into the ecu which when the auto solenoid is activated it activates the Shift Retard function which pulls the ignition timing and stops any torque going through the box. (this is what kills them)

 

Now im not sure at the moment if the stock ecu retards the timing or cuts the ignitions for a brief ms. Now I have briefly spoke to Ianc to see if on any of his datalogs from auto cars he has seen a retard in timing. He could not spot any which makes me wonder if it does cuts the ignition for a brief second. Now when I say second I mean millisecond which Im sure would not make it noticeable.

 

Now if it is ignition cut then the link ecu can be made to work with the Auto box. If it’s a retard then will have to wait for Link to release a new update which I have spoke to them about for shift retard like the MoTeC’s.

 

Be interesting if Pete from Thor racing had any input onto this.

 

Also searching though the different pin out sheets I cant seem to find a Pinout which is say an output from the box that goes to the stock ecu for retarding the timing so Im guessing that when it sends the signal to active the solenoid the stock ecu must cut or retard.

 

I have only looked into this for the last couple of days in detail but soon I will take a weekend off and spend some time testing.

 

Might be worth Matt asking Frasier if he has any input on this?

[Muffleman]

Hello mate,

 

Been thinking along the same lines, and I will ask Fraser next time I chat with him. Good thinking on the auto solenoid though, that is what I was trying to figure out if you use a stock ecu to manage the shifting.

 

We'll definitely have this sorted though.

 

I know with the AEM you have to fit a relay to lock the torque converter, not sure about the link\MoTeC though ?

[Robert]

My aristo is using the AEM to control the stock auto box, the shift between 2-3 and back down is clunky, apart from that its fine.

[michael]

I thought Link were developing a version of the XLEM G3 that's capable of dealing with autos?

[Ryan.G]

Ok just spoke to frasier so will chat to you later about it Matt but can be done with the link at present p.s He has finally got the Drive by wire working great on the vvti's now with m800

 

I thought Link were developing a version of the XLEM G3 that's capable of dealing with autos?

 

They are not developing a ecu that can control the actual box but i have asked them to add a shift retard function but seems there is another way around it that im going to test. Have just ordered up another Link plus so fear not michael will sort it out soon for your new turbo's

[michael]

Happy days

[Ian C]

That's possibly the first time I've ever seen you use the smiley