N54Tech.com - International Turbo Racing Discussion
(#1)
Old
Motown65 Motown65 is offline
New Member
 
Posts: 5
Join Date: Jul 2020
Car: 15 M3
Default 1-2 Gear Shift Timing pull - 10-06-2021, 01:10 AM

Hey guys my 1-2 gear shift is awfully laggy and rough. The rest are crisp. It looks like ign timing falls on its face and boost target drops down.

My car is a 2018 M4C DCT with pi, ps2+, xHP, jb4 w/ mhd bef, bms pi controller and exhaust. Also have plus at .02.
Attached Files
File Type: csv Log.csv (13.9 KB, 31 views)
Reply With Quote
(#2)
Old
Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Tuner
 
Posts: 20,666
Join Date: Oct 2012
Car: 135i
Default 10-06-2021, 10:47 AM

I don't really see an issue with the log. 1st and second gear are typically just a spin fest so that's pretty typical. I'd do a boost reduction for 1st, 2nd, and probably 3rd.



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
Reply With Quote
(#3)
Old
Motown65 Motown65 is offline
New Member
 
Posts: 5
Join Date: Jul 2020
Car: 15 M3
Default 10-06-2021, 05:23 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
I don't really see an issue with the log. 1st and second gear are typically just a spin fest so that's pretty typical. I'd do a boost reduction for 1st, 2nd, and probably 3rd.
Car actually seems to keep traction even on unprepared asphalt in 1st. This morning I got another log in. I changed my torque reduction in xHP to drop 150nm less and it’s holding calc torque higher on the 1-2 shift. It didn’t seem to loose traction till the top of 2nd at like 56mph. I forgot to mention I have 18in 305 MT ET SS. Is dme bt supposed to drop like that on the 1-2 shift? Also is timing supposed to hit 0 in 2nd?
Attached Files
File Type: csv P4_M6_R3_211006_0738.csv (26.4 KB, 28 views)
Reply With Quote
(#4)
Old
Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Tuner
 
Posts: 20,666
Join Date: Oct 2012
Car: 135i
Default 10-07-2021, 10:01 AM

Is traction control completely off?



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
Reply With Quote
(#5)
Old
Motown65 Motown65 is offline
New Member
 
Posts: 5
Join Date: Jul 2020
Car: 15 M3
Default 10-07-2021, 05:28 PM

this is all launch control testing
Reply With Quote
(#6)
Old
Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
Tuner
 
Posts: 20,666
Join Date: Oct 2012
Car: 135i
Default 10-11-2021, 10:40 AM

That's going to lead to a lot of intervention from the DME...not really something we have any control over.



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright 2007 - 2020, N54tech.com