- Member ID
- United States
- 2018 ONE SEAT
MPVI2 and a cable to data log are pretty cheap assuming you have a Windows based OS laptop and I think you'd find very useful for how you're using the car. I learn a TON from my drag strip logs and log every single run.
OK, I think I misunderstood what was happening. Especially since it seems low fuel quality is what may be causing this. My "Butt Logger" is NOW telling me this based on all your feedback. Correct me if I am wrong.
The car is actually shifting in something like 90 milliseconds (.09 seconds), but it feels like for about .3 to .5 seconds there is NOTHING. I was thinking all along that it was taking this .3 to .5 seconds for the shift to occur. Now I am thinking the shift happens in .09 seconds like planned and then the Timing and possibly the throttle are cut way back for that .3 to .5 seconds after the shift is completed due to it knocking violently. But I definately feel that the power is still reduced for as long as another .5 to 1 second after returning. So there is an initial huge reduction in power and then there is an ongoing smaller reduction in power.
If all the above is true, then why is there seemingly no issues on the 1-2 shift/converter lockup and the 3-4 shift? Maybe the characteristic of that 2-3 shift puts the knock over some critical threshold causing that hiccup.
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