Torque Reduction with High Stall Converter?
Ok guys, been having issues with this... Seems like if I try to keep some TM in the tune with a high stall (3600+) It doesn't work well, seems like PCM isn't seeing the correct amount of rpm drop during shifts and keeps the TM lagging the motor after shifts for like 2 seconds. Question is, is there any way to make TM work good with a big stall? This is on a 2002 Trans Am
Here's a LOG
Log_0045.efi
-John
:drivin:
1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
4L80e w/shift kit, PY 3600, and 3.73 gears.
22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
Bump!
-John
:drivin:
1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
4L80e w/shift kit, PY 3600, and 3.73 gears.
22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
Nobody?
-John
:drivin:
1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
4L80e w/shift kit, PY 3600, and 3.73 gears.
22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
Post your tune file.
Ok I'll have to make a new one, with a log. This was a long time ago and so I haven't done one in a while. My brother is wanting to run N2O on his 2001 Z28 with a converter and try to keep some TM in it to keep the trans alive. I haven't had any luck running any TM in the transmissions because this exact issue on every one I've tried. I'll try to find the tune file that was on the car when I made this log.
-John
:drivin:
1991 RCSB 2WD Sierra LQ4 swap, 220/224 112 cam, Twin VSR 6766 turbos
4L80e w/shift kit, PY 3600, and 3.73 gears.
22 PSI and E85, 4300# with driver. 9.7@138, 1.47 sixty
Up... i am seeing this problem too.
"All that is needed for the triumph of evil is that good men do nothing..."
Can you post some logs files and a screenshot of the TR tables.Originally Posted by Highlander
I figured it out.
Because of the stall the transmission is not seeing the big drop in rpm so torque management lingers. I found all the torque converter tables. I will be adjusting and report back
"All that is needed for the triumph of evil is that good men do nothing..."
Ok, thanks, I appreciate your feedback reports.
well.. funny thing is i was in a ECU swap (P59) along the way. So the new ECU even with the new tables doesn't lag the torque management on the torque converter.
I have to play this a lot more. The torque converter clutch tables do control a lot the steady state pressure of the transmission. Transmission feels a LOT more positive or less slipping, and it correlates with an increase in steady state pressure.
"All that is needed for the triumph of evil is that good men do nothing..."
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