Thanks for all the replies fellas,we will be resolving the problem with taller,wider tyres.I could go on and on about pro,s and cons of tyres/diffs/different wheels etc.but it comes down to cost effectivness verses bang for bucks.We should,nt complain too much and are only looking for minute gains after running it now for 5 years or so,punching well above what it should be doing finishing between 5th and around 12th outright at Morgan Park super sprints against all commers with 150k budgets and cars to match in a field of around 120 starters