Just thinking about rebuilding the bottom end of the car and whilst a Megan is probably the one which will go in I'm wondering how to go about making it more relaible/more able to take more RPM.

I was thinking 172 Clio connecting rods as I think BenR mentioned there the same size etc but better built and lighter so thats a start but is it neccessary?

Same for pistons are stock pistons fine or will an upgrade to the BB high compression or whatever there called be better if so what sort of gains is it just a few LB and its just only for a true racing engine?

What about ligthening and balencing the crank.

Also what sort of cost are we talking about? Whats sort of RPM are you then safe with I'm running 7.2k at the moment which I thinks a bit high with a ligtened and balenced crank etc could I run say 7.5k as looking at the RR runs for the car the engine not loosing any power at the limiter so more rpm means more power without any loss.