Can you run a dual map on the standard ECU on my03 JDM sti? Wanting to run one map on E85 and one on V power only. Is this possible with the Standard ECU or reserved for aftermarket ECUs only?

 

Yes you can have dual maps on the OEM ECU. I'm not sure which dual maps you can run though.

Dual maps on early newages could only change boost so not much cop apart from having a low boost map as a "valet mode".

Much later cars could have 2 maps with differering boost / ignition / fuelling etc but I'm not sure about your 03 JDM.

Not much help at all....sorry

Shaun

 

Speak to Bob Rawle, he will defo be able to tell you if this is possible on an 03 car and also ask him about the megarom file.

Banny

 

depends on which rom file it is on but it is actually switchable boost level, not switchable map..

therefore you could have say 1.3bar as vpower only and 1.5bar as e85 mix but you couldn't easily run straight e85 or straight vpower.
not without comprimising more than it would be worth doing.

Simon

 

Hi Simon, would the megarom do the trick here? Does it allow for different ignition/fueling/injector scaling needed for running E85?

 

Hi Simon

I thought the later Denso ECU's could run 2 full maps, switched via the ODB Port and not by the "heater switch - full throttle" toggle on the earlier newage ECU's
.

Shaun

 

Yes it would be ideal for the purposes of running different octane or CV fuels as it does indeed comprise of 2 full sets of maps for ignition, knock control, fueling, boost target and wastegate duty per gear.

Andy