It's worked for Ivan at least once . The main thing uprated springs do are keep the valves under control better, so they don't bounce of the seat and open when they shouldn't, then meet the pistons. Uprated rod bolts are a must too.oap-r said:but would it really?skiddusmarkus said:You don't hear of many R's with bent valves.If it's being rebuilt then aftermarket springs(£200+) and a rocker arm stopper kit(£50+) would help in future.
i find it hard to accept that uprated springs and this stopper thing will stop piston from meeting valves after a trip to 8-9000 rpm :?