The guys well know on the R5 forums and iv heard his name mentioned on here a few times
Scoff or something?
That would be me
At the last calc the engine made something like 350hp, the gearbox started to wine worse after each santa pod visit. I finally managed an 11.27 @ 127mph, and infact the gearbox still worked OK allbeit a bit noisey, but out mapping with 2 bar boost some weeks later finally killed it off.
I agree with some of the above, the 172's JC5 is the better choice compared to the GTT's unit. The GTT's diff is held in with a spring clip than can be problematic. the 172's ratio's also suited me better.
I am in the process of fitting a much stronger VW gearbox, I should be back on the strip next year with that