Trouble with turbo in grp n ,they are cheap and produce enough torque overcome the exesive weight that has been imposed with the current crash protection however the stronger transmission componants to take the high levels of torgue has only compounded this, the result is an overweight almost silent car that is so boring to watch .
the fact that an evo 9 weighs more than the old galant at the end of the 80,s means the Grp N cars have got so overweight ( to the tune of 150kg)
That is not exactly progress

In W.R.C i have heard figures of 2.5 bar boost with a compression ratio of over 12 to1, the cost of the Turbo alone is over twice the cost of a 2.5 Millington engine never mind the Engine and F1 tech ECU to keep it together

I cannot see how a Super 2000 type car with sensible restrictions from the start could even come close to the cost of a world car