Quote:
Originally Posted by rayhawk
SOHC seems like such a waste to me. I think it's only reason for existing is as a less expensive alternative to a manufacturer who relies heavily on DOHC motors, and where their engine architecture does not lend itself well to pushrod design. The only slight benefit is not having the pushrod weight to move up and down, but the additional cost, complexity, size, weight for a moderately better ability to turn higher rpm don't seem worth it to me.
DOHC vs. pushrod is a better debate, and the DOHC setup lends itself to better flexibility due to smaller valves and the ability to independently vary intake and exhaust timing (although certainly at the cost of complexity). You can also achieve loads of flow with small valves and low spring pressures-easier to reach high rpm's.
With that said, in my opinion, a pushrod motor is the way to go as the best compromise. You are usually limited where engine mods are concerned in an OHC setup, if nothing else than for historical purposes. I am more concerned with an engine's displacement than the cam configuration, because in my experience displacement is what makes a street car fun to drive, more than anything else. To me an engine that needs 5000 rpm to get moving is not as fun to drive as one that pulls hard at 3-4k rpm.
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I change the title
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