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im planning on building another d14 head with springs, retainers, cam, 3 angle valve job, and a port

i am going to replace the valves in the head and was wondering if it is worth wile putting in 1mm oversize valves. obviously i will get the valve seats cut to suit. so is it worth it?

cheers

marty40 wrote:im planning on building another d14 head with springs, retainers, cam, 3 angle valve job, and a port

i am going to replace the valves in the head and was wondering if it is worth wile putting in 1mm oversize valves. obviously i will get the valve seats cut to suit. so is it worth it?

cheers

No ,use stock size.

bigger valves reduce velocity of the mixture?

Sure. In a small engine that would not compensate !