Re: Unleaded

Posted by Peter Packard On 2016/6/27 17:51:15

I may be incorrect but have been setting my exhaust valve (245,282,288,327, non hyd lifter engines) clearances at 10 thou instead of 7 thou in the hope that the few extra microseconds that the valve is closed may assist in getting rid of a bit of heat from the valve head and lessen the possibility of valve recession. I have had severe valve recession in my 38 Richards Six which I run very hard on the highway ( 70 to 75 mph in OD). Last time I cut down a 288/327 exhaust valve and fitted it. No problems since but I don't drive it as much or as hard nowadays, too many "Federales" and Speed( revenue) Cameras about. PT

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