Good work! Definitely keep us updated!

 

hi Gunzo, so i am not sure if i understand, so we are dealing with ecu v. tcu, engine power cut v. tansmission clutch disengagement. so that really gives us a lot of combinations of what and when to control

since getrag built the tranny, they can customize the gear ratios, shift points based on certain parameters and i would assume that the shift points would be what is controlled by the TCU (including driving mode programs) so lets assume the end goal here is to protect the tranny from excessive torque,

If ecu reads torque (airflow) then it can either force engine to go into limp mode or send request to TCU for tranny gear to disengage,

so which is it and when does it happen, and of course how can we change it get beyond this limit?

i spoke to somone at cobb and they say that you can raise the threshold by controling the airflow limit table ( i assume that its in the ECU)

what say you?

thank you

 

I wonder what would happen if you load the R/A with the MR program, and change the fuel maps among a few other things..

 

The big question is still WHO BUILT THE TRANSMISSION ..
It was ASSUMED to be getrag ..

I think you understand correctly ..

TCU (tranny) sends a signal to the ECU (Engine) for shift .. ECU references a table and sends back a YES /NO signal ..

If a NO signal is sent .. the gearbox goes into protection mode and frees the clutch .. the engine freerevs and trigger a transmission slip code ..

I hate this current ECU as it has multiple layers of protection .. The airflow limit which Cobb mentioned is 1 just of many .. once they exceed that .. it'll trigger another set of codes ..

 

How are you figuring this stuff out?

 

hit both of those already.

 

so you gotta an RA you working with?

 

I can't fix what I don't know bryan ..

You're supposed to send me details

RPM / tps
load / timing
g/s
Dynoed torque / hp

where all the lights are triggered ..

Mine doesn't trigger, everything is good on my side ..

Merry Christmas !!

 

Getting a RA on the dyno testing with Ecuflash here in the next couple weeks...

Expect a full blown post/review.

 

We have a number of Ralliarts in house weekly Richard. We'll get you your info asap.