Are oversized valves really needed?
Im rebuilding my 1930 Town Sedan motor and am adding a few upgrades such as high compression head, V8 clutch and weighted and balanced crankshaft. I know some install oversized valves and adjustable lifters but is this really necessary? Will I get more horsepower with this addition? What type of machining is involved to intall these bigger valves? Also, I hear others install a touring cam. Will a different cam make standard valves perform better or is it just used when intalling the oversized valves? Finally, are adjustable lifters recommended when using the oversized valves and touring cam or can they be used for the standard setup as well. It seems that valves will need to be reground some day but only after heavy mileage has been incured so why install adjustable lifters? My goal is to be able to drive the freeway at 55-60mph if needed on tours and I will be installing an overdrive in the future to accomplish this. Any ideas? Thanks.
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