I did plan to use the F7R and turbo charge it but ruled it out as I think it weighs to much and the power it would produce would destroy any gearbox I threw at it. I know I will never get the weight balance perfect but I am never going to get anywhere near it with a big heavy engine like th F7R. Ideally I would like to build the car up on corner weight scales but I need to look in to the cost of such equipment. Are there any all aluminium 1600cc,16 valve engines in the Renault parts I could use for turbo charging?