Valve clearances and lunched motor

[gammaguy]

what a lot of people dont know is that valve clearances are also impoortant for cooling,mainly in the exhaust valves.

The length of time the valve spends on its seat(dictated by the clearance)also dictates how much heat will be dissipated from the head of the valve and therefore cooled.

Not enough time on the seat and its hello burned valves

[Pussy]

You can get slightly better low end and mid-range power when the valve lash is set at the looser side of spec, too