Twin mapping an ecu? Sport + eco mode

[bmw9818]

Just curious is it possible and if so how difficult would it be to run two maps on a m20 ecu,

A super Eco mode for example, which would restrict throttle input keep revs low etc

And then just a sport type mode?....

Possible?

[bigwinn]

could you physically run two ECU on a switch type arrangement?

[harry_p]

unless you run a drive by wire throttle you're not going to be able to do anything about the amount of throttle input.

i think it would be easier just to moderate the throttle input and revs yourself to save fuel

[bmw9818]

That's what I was thinking but the wiring would be insane in addition to the car running lumpyish as it learns the new settings?

[ross_jsy]

Ant from A-tech used to offer a twin map ECU, I'm guessing it was megasquirt based

[Speedtouch]

It is possible, by replacing the standard 27C256 EPROM with a 27C512 which has double the capacity and programming it with two maps, and use a switch to toggle between them:

http://qcwo.com/technicaldomain/dual-performance-chips