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AEM to control engine and Stock ECU auto box..Possible?


Guest SupraGTE

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Guest SupraGTE

Hi

 

Have any tryed this ? any help would be very welcome

 

So i want the AEM to control the engine but also leave the stock ECU in the to control the autoboxe anybody done this ?,

 

cheers

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I see no technical reason why this is not possible, I am sure its been done for other ECUs ie Motec etc.

 

One of the main reasons for choosing an AEM over other ECUs is that its plug compatible and you will be loosing this as you would have to wire it up as a piggy back, do you already own the AEM ECU or is it something you are looking to purchase?

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Guest SupraGTE

Hi Wez thank you for your reply,

 

yes i have an AEM Ecu and it is controling also the the auto gearbox at the moment, but i do not trust it , but im looking to purchase a Stock ECU as i do not have that:)

 

yes i will loose the plug in advantegd ... but thats life

 

also i have gotten the recomandation to sell the AEM and buy HKs vpc and hks gcc

Edited by SupraGTE (see edit history)
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I looked into this a while back when I was unsuccessfully trying to run an AEM with my auto box. As far as I know, it hasn't been done with the AEM, at least in a Supra in the UK. The last time I checked this out on the AEM forums (a while back), I couldn't find any reference to anyone dong it elsewhere either, which surprised me. I contacted Thor Racing and was told that it was possible, but would involve making a bespoke harness.

 

In some ways, it seems like an ideal compromise: let the AEM do what it does best (fuelling, timing) and leave out the bits it does badly (controlling the gearbox). As Wes says, other ECUs do it.

 

In the end, the AEM had trashed a number of autoboxes and I didn't fancy being the first guinea-pig for testing the AEM as a piggy-back, so I went manual. Now I love my AEM and - touch wood - it works perfectly.

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Guest SupraGTE

Thanks for the info, yes i also conatced suprastore but they told me to go for vpc an gcc

 

Ok seams like im going to be guinea-pig then :), just would need somebody to help me wire it up as piggy back , preferable somebody with piggy back skills on supra

 

I have the harness out of the car (in a box at the moment)

Edited by SupraGTE (see edit history)
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Guest SupraGTE
We finally got the AEM working with your torque convertor correctly, before anyone asks ...NO I am NOT touching another auto with an AEM.. it took many hours sorting CK car sorry many months with the aem tune and the autobox.

 

So when do i bring my car ? :)..LOL,,, just kidding, been reading forums around the net and AEM+Auto= Fast lane to nuts house :)

thats why i want the stock ecu to control the box

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We finally got the AEM working with your torque convertor correctly, before anyone asks ...NO I am NOT touching another auto with an AEM.. it took many hours sorting CK car sorry many months with the aem tune and the autobox.

 

You can sell my auto box map for a small fortune if thats the case,cos the car handles just like a stock.:)

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Guest SupraGTE

I haft to say my car was also running very good , like a stock with AEM and and the AEM been in the car atleast for around 3 years but i do not trust the AEM as auto control :) it was a company in southampton that mapped it , now idea what company....im trying to contact the previous owner to ask...... but reading how the stock ECU controls the auto box and how the AEM does , then i really now want to keep my AEM far away frommy autobox.....

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Guest SupraGTE
put some coolers on the autobox ...its heat that kills the boxes.

 

 

have one 23 row and second one on its way in, is that enough or recomend even more?, trying to find a fan(s) for these coolers also

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It can be done, but there are two pit falls. IGF igniter signal conditioning for the factory ecu and signalling the AEM to do ignition retard prior to the gear change.

 

I worked out how to do all this on a Link ecu using clever use of secondary maps and a box of tricks to intercept the solenoid driver lines, but it's not straight forward.

 

I've done it on Supra MK2, MK3 (and one Mk4 but Auto) but MK3's don't have pre shift retard or IGF issues as they Auto ecu is a stand alone unit and can easily be fibbed to.

 

You could always buy a PCS Gearbox ecu for about £500 and play with that.

 

Lyndon.

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Guest SupraGTE

Soon i will put my twins back :) , thank you all for the information so far, how about greddy emanage? , suprastore recomends the vpc and Gcc , for the fcon any positive o negative sides,

yes motec seams to be the diamond .... but it has a price also :)

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Only drawback to the F Con is no traction control, I am more than happy with the choice I made, and remember I have a Motec just sitting here.

 

Its a nice bit of kit but I would say another major drawback for the FCON is you are limited to who can map them, generally the mappers who do map them lock them down so you cant take it elsewhere if you are not 100% happy.

 

As for Motecs, they are over priced :p

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