I raised the ECU rev limiter to 6500. (Eurocharged) Bought a TCU that worked off the S/W switch. S was stock and W was full manual. The idea was rev the engine higher and shift later to take advantage of the higher redline. It didn't upshift until commanded. However, the upshifts were sooo sloooow in W that it negated any possible benefit from the control. I had to hit the shifter way early to avoid the limiter. The lag was such that I ended up shifting much to early to avoid the limiter. It never worked well enough to be of benefit on the road course or 1/4 mile. I still have that TCU in the closet (Evotech), epoxied shut). When I swapped out my ring and pinion for a 3:27, I purchased a tuned TCU from Rudy. (many years ago)) I never could tell any difference from a stock TCU.
If I bring my car out of retirement I'd most likely want to run 1/2 mile events or do some drag racing. Nitrous, perhaps. I'd want higher shift points and lightning upshifts. This car is my toy, not a daily driver. I dynoed my car with the Evotech TCU and ran it out close to 6300 rpm years ago and the power is still climbing at a 45º angle. Lots of power up there...lots.
Obviously I'm toying with the idea of returning to the racing scene and Eurocharged is no longer a tuning option and my TCU has me yawning. Therefore my interest in your tuning and project. I'm subscribed.

Les