The frontmount intercooler blocking the rad is the biggest cause of high water temps on a rst.If you trim the leading edge off the bottom cross member,and then lower the front mount, it will then leave a gap at the top,which lets more air get to the rad.Also running a rad in the water feed to the turbo will help,as will an oil cooler.But remember,wherever you fit these extra rads,they have to be upright with air passing THROUGH them.I've seen too many oil coolers fitted in engine bays of rst's,bolted to the inner wing at a 45 degree angle!!!!!