Next Goodwin-Powered Platinum Edition Skater is in the Works
04-07-2016 | 04:52 PM
#24
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Joined: Jan 2006
Posts: 3,869
Likes: 797
From: St. Pete Beach, FL
? The size and weight of overhead cams?
Many less parts, many less contact or friction points, many less items to fail.
Size wise not any bigger
Weight wise I never weighted all the parts of a overhead cam system to a Heavy duty push rod setup but I'm pretty sure the overhead cam setup is lighter in that manner also.
Biggest limiting factor has always been rpm wear and tear on the valve train in a boat.
Overhead cams really get rid of that issue or at least make that issue much less of a issue.
Every new car / truck manufacturer run overhead cams, because there more reliable and they can spin the rpm up for more peak power.
Motorcycles have been that way for years.
Even small engine stuff on higher end mowers are going that direction.
Many less parts, many less contact or friction points, many less items to fail.
Size wise not any bigger
Weight wise I never weighted all the parts of a overhead cam system to a Heavy duty push rod setup but I'm pretty sure the overhead cam setup is lighter in that manner also.
Biggest limiting factor has always been rpm wear and tear on the valve train in a boat.
Overhead cams really get rid of that issue or at least make that issue much less of a issue.
Every new car / truck manufacturer run overhead cams, because there more reliable and they can spin the rpm up for more peak power.
Motorcycles have been that way for years.
Even small engine stuff on higher end mowers are going that direction.
Last edited by hogie roll; 04-07-2016 at 04:54 PM.
04-07-2016 | 04:53 PM
#25
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Joined: Jan 2006
Posts: 3,869
Likes: 797
From: St. Pete Beach, FL
Doesn't just look massive, it is massive. Wider than big blocks. You think you could get the output on a Ford OHC engine as high as you could on a BBC?
