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Old 01-30-2016, 07:00 PM   #1
j.boy
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Join Date: Apr 2013
Drives: GT86
Location: Philippines
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Help on Launch control disable speed to control wheel spin during launching

I was thinking on trying to control my wheel spin during Launching (drag) without feathering or fanning the throttle pedal by using the table launch control disable speed. With the goal in mind of getting better and constant drag strip time by decreasing rear wheel spin during launching.

At first, I checked what certain cruising speed on 1st gear at 3.8k RPM and noticed that it was at 16-17mph on my current wheel/tire setup.

I had then set my launch control at 3.8k rpm and launch control disable speed at 16mph, thinking that launch control would be maintained even on WOT until 16mph. (Goal : easier and constant launching and controlling wheel spin )

I was successful in doing this and data logged my rear wheel slip, RPM, Road speed, rear wheel and front wheel speed.

I was able to lessen the wheel slip duration during launching even on WOT, and acceleration was smooth until 6k rpm where it suddenly drops back to 4k rpm even tho i was flooring the accel pedal. my logs showed a sudden cut off on the throttle around the rpm range where rpm drops. (during this time i didnt eased off and was flooring the throttle pedal).

attached my datalog.. It happened on the 11th - 12th second on this log.

This sudden drop of RPM on WOT only happens on the 1st gear.

And if I decrease the LC disable speed , this problem doesnt occur.
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