Thanks for the advice on the turbo boost for my rally car. My cars drivetrain set is as follows. Gearbox - STI TYPE R close ratio, front diff STI LSD 4.4 ratio,rear diff STI LSD 4.4 ratio, centre diff STI v5 20kg.I have just fitted the type R ratios and the rear diff and the car seems not to be able to turn into corners as easily as before.Would it be advisable to put in a 12kg centre diff for less lock up?

 

We run a Prodrive 97 group N car and have plated front and rear diffs we run a 20kg centre diff without problems. Mainly we our out on gravel with mildish settings on the plated diffs we run more aggresive settings on tarmac.