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Dq250 auto shifting after hard launch
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Topic: Dq250 auto shifting after hard launch (Read 1494 times)
andyc1234
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Dq250 auto shifting after hard launch
« on: June 03, 2023, 06:47:31 AM »
Dq250 in manual mode. Shift points set to above the engines rpm limiter. On a hard launch which spins the wheels slightly the gearbox will auto upshift at too low of ab rpm. Not sure if it is an issue with the mechatronics or the mapping
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Jason
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Breaks everything!
Re: Dq250 auto shifting after hard launch
« Reply #1 on: June 13, 2023, 07:16:45 PM »
I am chasing a similar issue on my 7R. It's definitely calibration related.
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marchewa
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Re: Dq250 auto shifting after hard launch
« Reply #2 on: June 29, 2023, 02:57:37 AM »
I also occur similar problem. I'm able to disable auto upshift when upshift limiters are set above RPM limiters, but when I set upshift limit eg. to 6800 (RPM limiter 7000rpm) gearbox shifts not higher than 6000RPM.
I have a feeling that it is dependent on clutch slip- my guess is that if slip is too big (but still can be unnoticed by driver) gearbox reacts by early upshifting.
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andyc1234
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Re: Dq250 auto shifting after hard launch
« Reply #3 on: July 07, 2023, 04:13:27 AM »
I have recently done a gearbox adaption and that seems to of solved the problem. Car is now in pieces again having upgraded clutch pack fitted so can't do anymore testing till that is done
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James1
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Re: Dq250 auto shifting after hard launch
« Reply #4 on: July 07, 2023, 07:59:46 AM »
Uprated clutch pack is pointless on the DQ250. The standard clutch can hold more torque than the gearbox can.
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prj
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Re: Dq250 auto shifting after hard launch
« Reply #5 on: July 07, 2023, 09:14:27 AM »
Quote from: James1 on July 07, 2023, 07:59:46 AM
Uprated clutch pack is pointless on the DQ250. The standard clutch can hold more torque than the gearbox can.
+1 the input shaft and the gears give out way before the clutches do.
Only people who can't tune fit different clutch to it.
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PM's will not be answered, so don't even try.
Log your car properly.
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