Anthony;c-156147 wrote16” rims and bigger are the go for a successful outcome.
STD Volvo 240 brakes in top condition really work well.
The RX7 upgrade gives say a 10% improvement that becomes noticeable under maximum braking effort and that’s due to the calipers being mounted further out on the larger disc. The caliper 4 pistons are exactly the same diameter as the 240 Girlings.
So it’s an upgrade, but not in the 6 piston Brembo league.
If its only a "10% improvement ", wouldnt it just be better to get way more aggresive pads?
Ive also heard braided lines allow more hydraulic pressure to get to the caliper.
Just spit balling here.