Retard timing before shift

'Microsquirt' Transmission Control development and support.

Moderators: jsmcortina, muythaibxr

Retard timing before shift

Postby white probe » Sun Sep 03, 2017 7:24 am

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.
Attachments
2017-09-02_19.19.00.msq
Transmission file
(26.01 KiB) Downloaded 10 times
2017-08-28_22.27.25.msq
Engine file
(263.22 KiB) Downloaded 9 times
white probe
MS/Extra Newbie
 
Posts: 10
Joined: Sat Apr 25, 2015 7:52 pm

Re: Retard timing before shift

Postby Matt Cramer » Thu Sep 07, 2017 7:57 am

Maybe this one needs a bit less line pressure. Higher line pressure makes for harsher shifts.
Matt Cramer
Super MS/Extra'er
 
Posts: 13646
Joined: Thu Apr 16, 2009 8:08 pm

Re: Retard timing before shift

Postby jsmcortina » Thu Sep 21, 2017 9:45 am

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
I can supply, repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: viewtopic.php?f=104&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
jsmcortina
Site Admin
 
Posts: 33911
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK

Re: Retard timing before shift

Postby white probe » Sat Oct 07, 2017 5:42 pm

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.
white probe
MS/Extra Newbie
 
Posts: 10
Joined: Sat Apr 25, 2015 7:52 pm

Re: Retard timing before shift

Postby jsmcortina » Sun Oct 08, 2017 5:55 am

The next beta version of the transmission control code has more fine-tuning available for shift timings.

James
I can supply, repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: viewtopic.php?f=104&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
jsmcortina
Site Admin
 
Posts: 33911
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK


Return to Transmission Control

Who is online

Users browsing this forum: No registered users and 1 guest