Hey fellas , my friend has just had an new engine built up for his mk1 . Its now a 2.1 with a newman cam and solid tappets etc . He chose not to take my advise and buy some uprated valve springs and now we are having a problem with the standard springs fully compressing causing the engine to lock and the belt to jump teeth .

Can anyone advise me as to which are the best uprated valve springs to go for ?