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Retard timing before shift
Posted: Sun Sep 03, 2017 7:24 am
by white probe
Hi Guys I have a ms3 pro for my engine and micro for the transmission, I am in the early stages of tuning the engine, the problem I have is with the trans shifting hard, I have 15 degrees of retard timing when shifting I would want more but I dont know if it can accomplish, I data log the transmission and the micron send the shift and retard signal at the same time, it would be possible to control the timing so it retards a fraction of a second before shift and do you guys know if timing can retard more than 15 degrees, I attach engine and transmission file, thanks for your help.
Re: Retard timing before shift
Posted: Thu Sep 07, 2017 7:57 am
by Matt Cramer
Maybe this one needs a bit less line pressure. Higher line pressure makes for harsher shifts.
Re: Retard timing before shift
Posted: Thu Sep 21, 2017 9:45 am
by jsmcortina
The maximum retard is set at 15 degrees in the ini file, which can be edited. However, as Matt says, perhaps you are running too much line pressure.
The timing of solenoids and retard etc. is more flexible in the beta firmware I'm currently working on, which may help you get better shift behaviour.
James
Re: Retard timing before shift
Posted: Sat Oct 07, 2017 5:42 pm
by white probe
Thanks Matt and James for your answers, I adjust line pressure and is more much smooth, also datalog the engine on wot and notice on megalog the timing retard about .25 of a second before shift, this auto tune is very good, still adjusting the fuel tables but everything is looking great, thanks for you help.
Re: Retard timing before shift
Posted: Sun Oct 08, 2017 5:55 am
by jsmcortina
The next beta version of the transmission control code has more fine-tuning available for shift timings.
James