Originally Posted by
JoshS
We're pretty far off topic now, but to continue the thread of conversation: It's not the 16" that's a bummer, it's the 7" width. Versus 8.5" in ITR, that's a big loss of width. FYI, the $160 Kosei K-1 in 17x8.5 is only 16.8 lbs. That's hardly serious coin as lightweight 17" wheels go. They fit perfectly with no spacers necessary.
Only the Z3 had the aluminum block M52. The 3-series and 5-series both had the iron block M52. The M52tu was aluminum in every application. That USTCC car was not a "tu" I'm pretty sure.
But to be competitive in EP, you'd have to do things that would be very hard to undo to still race in ITR. You'd have to do lightweight panels and/or lexan to get down to that weight. And you would need the additional power that the Prod rules allow for.