1-2 Shift Rev Limiter and 2-1 Shifts as well

[Rare87GT]

It seems at WOT, my car will hit the rev limiter in the 1-2 shift and also in the 2-1 downshift. What's the best way to correct this? Lower shift points based on RPM? So command the car to shift at 100-200rpms lower than it was before so the tranny can make it try and shift and get it into the next gear before the rev limiter?

Thanks.

[Phantom]

Without seeing your tune I am guessing a bit.

If you like/want to shift at the set RPM lower the MPH setting a few. The VCM wants to see both RPM and MPH requirements to shift. Then raise the rev limiter a little if it still hits it. After that start to lower your shift RPM till you have it shifting where you want.

Also I would set the 100% TPS line in part throttle shift to the same as WOT, I do not have any clue if it would look at that line or why they have both but setting them the same eliminates the chance of that being a problem.

The 2-1 shift I assume that it hits the rev limiter then shifts back to 2nd is that correct? If so lower the WOT shift speed to several MPH below the 1-2 WOT shift MPH. That way it will not down shift just to be in gear long enough to have to shift back to 2nd.

[Bandit gs]

Zero out your MPH WOT table and let it shift on RPM only, this way if you run a different size slick at the track you don't have to deal with the headaches. I ruined a tranny years ago from rev limiter hits, killed the clutches.

[Rare87GT]

What about for downshifts? How does the PCM know when to downshift from 2nd to 1st if it's reading only off of RPM only and not MPH?