Oversized valves: good or bad?

StrokerScamp said
The same "good or bad" arguement can be made for anything. 12:1 compression pistons are "bad" if you wanna run pump fuel. A cam with .260* [email protected]" is "bad" without other things that make it work well. A loose converter is "bad" without deep gears.

Disagree, I have seen several cars with high way gears and loose converters some of the funnest street cars to drive, just ask gmachinedart

green1 said
Think of an engine as a well-oiled sewing machine.Carb has to be correct for; compression and cam. Intake the same. Cam has to be degreed for what the rpm is. Then, exhaust has to be tuned. And we haven't talked about piston weight, balancing, dissy, timing, etc.
It all works together when correct. this is how national records are won.

Worst analogy I have heard in my life, when did sewing machines get engine parts?

Can some one explain why hp 383s came with large port heads and 2.14 valves but when you have a 360 or 408 it is automatic for someone to say 2.05 valves are to large? Seemed to work out ok for the 383 .

I think this is another case of people reading a lot of posts and thinking they know what they are talking about, but..but everyone online says so, overanalyzing "uncomprehended" theories again.

I agree that a good way to compensate for a sunken seat is to oversize the valve itself, but as far as "flow" the bowl will need to be opened up proportional to larger valve installed (or at least faired into the seat), if not you just put a larger wall in front of the incoming air.

Bottom line, until you try it, you won't know. Try it dude.