Torque limited in 1st gear during "spool mode"

JPuehl

Specialist
Jul 24, 2019
90
121
0
Greater Seattle area (a.k.a. Zombie Land)
Ride
2011 135i 1M clone N55e DCT
I'm DYI'ing my tune and currently playing with limiting torque in 1st and 2nd gear using the "Modeled torque limit" tables and while this is working fairly well I have noticed in my logs that torque in first gear is being limited during "spool mode". Torque has a slow steady climb until it reaches the "Spool mode max rpm" value, then it climbs quickly. I tested different values, 2500, 3000, 3200 and 5 and in all cases torque climbed quickly after spool mode. Does anyone when the setting or table that seems to control the amount of torque made during spool mode in 1st gear? I use MHD but am not interested in using the torque limit by gear feature it has.
 

wheela

Lieutenant
Jun 4, 2021
1,127
632
0
Twin Cities, MN
Ride
2015 e84 X1 35i Msport
Did you ever figute this out?

Are you seeing any torque limits showing up in your logs that accompany this? How about your load target, is that lower until you get out of spool mode as well? I'm curious if it's targeting less, or just leaving a bigger gap between target and actual.
 

JPuehl

Specialist
Jul 24, 2019
90
121
0
Greater Seattle area (a.k.a. Zombie Land)
Ride
2011 135i 1M clone N55e DCT
Did you ever figute this out?

Are you seeing any torque limits showing up in your logs that accompany this? How about your load target, is that lower until you get out of spool mode as well? I'm curious if it's targeting less, or just leaving a bigger gap between target and actual.
I forgot all about this post. I kind of forgot about it as the weather in the PNW has been wet (wetter than last Winter anyway) so I haven't really messed with it any further. I need to play around with this some more.

Are you seeing any torque limits showing up in your logs that accompany this? No limits, timing pulls, throttle closures, nothing in the logs that should cause torque to be limited. The one thing I do notice in the logs is that the exhaust vanos is ~0 (so 115*) until ~2500 rpm then a big in retard which could be causing the increase in torque. I haven't tried retarding the exhaust cam in the spool table yet to see if that makes a difference, but will when there's enough dry pavement to test it.

How about your load target, is that lower until you get out of spool mode as well? Load targets are fine, smooth, nothing with a big increase ~3k rpm.

I'm curious if it's targeting less, or just leaving a bigger gap between target and actual.

I did find a log with the "spool mode max rpm" set to 0 to see if it's a spool version of a table and had the same increase in torque ~3k, and same exhaust cam timing.