Car won't go near redline?

[DarkInferno]

Haven't the foggiest what my max rpm is... never been brave enough to take it above ~5500, 6k certainly seemed possible but I figured a wild conrod might appear if I carry on, and obviously its losing steam quickly up there.

I thought it was beneficial to have the raised/removed limiter so it didn't cut the fuelling until higher so you could pull up to ~4k?