Gilly wrote:
I would probably say double valve springs are a must with a Re-13 powerband from 2700 to a if your engine is up to it 7700rpm

Due to the increased valve lift you should fit C-AEA526 springs or similar. These are good for 8000 rpm, and are 1 coil shorter so will stand 0.495" valve lift.
Not absolutely essential with stock rockers (S double springs will do) but you WILL need these with 1.5s.
_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
