Thread: 255 merc engine
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Old 09-04-2020, 06:43 AM   #9
Frank Miller
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Join Date: May 2010
Location: Auburn, MA
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Default Re: 255 merc engine

In my opinion, performance is gained by sacrificing reliability. but Now that is not a hard rulw but think for a moment what you do. If you stroke it you increase piston speed which promotes wear. A high lift cam requires the valves move further which increases wear. Also consider ramp angles, time on seat to cool. How much of a change it makes I cannot say but you cannot deny it. A five second dragster turning 10,000 rpm gets torn down after every run in spite of the crank making fewer than 1000 turns on the run.
I'm not against sacrifices to the gods of speed just figure out what you want it to do.
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