Best ECU to work with Auto box

[jumpbike]

Hey,

 

There's a lot of old posts on here about ECU's and piggy backs and stuff but times change and there's a load of new stuff out now that seems less documented but will probably do the job better.

My question is simply, what do people recommend as the best ECU/Piggy Back to use while keeping the auto box control? I'm kinda out the loop on newer stuff so maybe a lot of new stand alones now also control auto shifting? Still unsure on piggy backs as I keep reading they are good at the start but go wrong once the stock ECU starts to try correct it self it throws off all the settings for the piggy back.

Engines a 2JZ GTE running a rebuilt stock auto with modified valve body.

 

thanks,

[johnny g]

Syvecs' latest firmware now supports the autobox control/strategy

[tony tt]

Syvecs with IO expander. Piggy back would kill the box IMO.

[jumpbike]

Cheers guys, I'll look into it, whats the chance they do a plug and play one for a JDM engine?

[j_jza80]

Syvecs make a 'plug and play' harness

[Swampy442]

Don't know how they could go wrong, the piggyback removes the engine control functions from the stock ECU, leaving it to control the gearbox. Ill be using an HKS fcon gold and a stock ECU on my car, but there are many options, the most important thing is to find a tuner you're happy with then go with their recommendations.

[Chris Bailey]

Syvecs especially if your single turbo auto.

[98HT]

Don't know how they could go wrong, the piggyback removes the engine control functions from the stock ECU, leaving it to control the gearbox. Ill be using an HKS fcon gold and a stock ECU on my car, but there are many options, the most important thing is to find a tuner you're happy with then go with their recommendations.

 

Agreed. Plenty of people use piggybacks in combination with the autobox and had great succes.

 

Another option is the Pro-efi (probably the most used).

[Kaan W]

I used a syvecs as a piggyback to control the drivetrain whilst the stock ecu had full control over the autobox. Now with the syvecs having new firmware the stock ecu can now be ditched with the syvecs having full control over the engine and autobox making the auto fully customizable.

 

The pro efi is a common standalone in the states for auto control but I've heard problems of box's burning out down to line pressure being hard to map right causing slippage. The syvecs is probably the most advanced standalone ecu for tuning on an autobox imo and can also be fitted with flappy paddles now as an extra.

[jumpbike]

Don't know how they could go wrong, the piggyback removes the engine control functions from the stock ECU, leaving it to control the gearbox.

don't know if it still works like this but I know some of the older ones worked by changing timing etc. in relation to the original signal so if the original signal changed then the piggy back signal changed by the same amount. I assume on the later ones you just literally snip the signals from the original ecu and wire the piggy back in on its own for the injectors and timing

 

update: reading up a little, this seems to be how the HKS FCon IS works, the problems being how do piggy backs respond when the self learn function kicks in in the stock ecu and alters its own settings.

 

Can a stand alone be used with the basic wires for the stock ecu left in place to just control the auto shifting?

Edited September 25, 2014 by jumpbike (see edit history)

[Alex]

You can leave the stock ECU to control lots of things like the AC and Gearbox. The Gearbox work on inputs and readings not power levels / delivery.

It's nice to have the Powertrain controlled from 1 ECU but not required.