8 pot calipers on an 800kg car? Why
He could have saved a fortune by buying something more appropriate like a Wilwood Dynalite kit. I think some people just get carried away. There's nothing wrong with a sorted Nova as a track car, I just don't see what it gains by having 8 piston calipers.
unsprung weight
some people really do seem to go overkiill on the brakes, gayers on the VW boards are terrible for it. my golf has standard sized 280mm discs, standard calipers etc and the discs are bomb proof and mine is about 25bhp overstandard etc