To figure the optimum upshift RPM point for maximum acceleration, you need the torque values at relevant RPMs, and to know the gearing. Though you can include R&P and tire rolling radius if you want, for easier conversion between RPM and speed in a gear.
The upshift point is where the applied torque (engine torque times gear boost, and calling it thrust may help understand things) of the old gear is the same as the applied torque in the new gear. On my '
82 US SC on the track I upshift from 2d to 3d at about 6,250 RPM, and to 4 and 5 at 6,000. Of course, I may run it up to 7,000 if that saves an upshift. I don't do standing starts, though it looks like 6,500 would be where optimum would be for 1st to 2d.
On the street I'd never push it like this. Why would I?
This is how Porsche described how to figure upshifts, as reproduced 25 years or so ago in an Upfixen. Explained how to do it with graph paper. Spread sheets make it much easier. Still have to do some eyeballing with this sheet to see what the RPM at the crossover points is, but good enough.
Reference to where these points are with relationship to torque or HP peaks refer to purely serendipitous relations. Yes, on any sort of normal torque curve it will be above the torque peak. Mine was at 4,000.
Here is how my SC (rev limiter adjusted to 7,000) came out. Data points are in 500 RPM increments, with the highest RPM being 7,000.
