Just wondered if you all knew...Turbo Charged ECOtec's in a few of the classes are limited to:

"ECOTEC engine limited to maximum 66mm Turbo, where the maximum compressor housing inducer diameter is 67.25mm (2.648 in.) measured at the point where the leading edge of the compressor wheel meets the housing. Compressor wheel inducer diameter not to exceed this value, nd contours of wheel must be 'unstepped' i.e., the controus must be continuous features from the inducer to the wheel exducer"

I don't think the open class is limited to it though. But, of course there are other regs on speed and ET's that will have to be met if you totally blow the sign away with your startling Ion numbers.