Did you put the original valve springs back in with the original cam?

My problem is valve bounce, the valve springs Piper sent out with the kit must not be strong enough. I'll be getting back in touch with them Monday to see what the set they're measuring come out at. If they still aren't strong enough i'll have to sort something out with them.

I've been advised standard RS turbo valve springs will cure this, but spoke with Piper first since the kit supplied obviously isn't correctly spec'd.

Another option advised is the Newman 190lb single valve springs, these are £48 for a set of 8, and should also cure the valve bounce. If Piper don't co-operate/supply correct springs i'll be using the Newman ones and i'll let you know if it cures it. I should know by the end of this week.