Diesel RPMs
The diesels engine needs about 22 to 1 compression ratio to detonate the fuel. To do that you need a long stroke engine or you will put an awfull lot of load on the top end. My "rule of thumb" research is that 3400 RPM Volvos, Yanmars and Vws last 6 to 10 years. 2400 RPM 3208 Cats last 15 to 25 years and 1800 rpm in-line Detroits last 20 - 30 years. If you spool 'em up you'll burn 'em down.
The old 170 Yanmar put out the same torque as a 454 at 3200 rpm's. the problem is the Yanmar was "against the wood" and the 454 was a half throttle. I run them all easy - an engine only has so many "frams" in - no use in using them all up today. Equipment is expensive to replace and It's tough to figure out how to depreciate "toys" with the IRS!!!
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10-07-2015, 07:52 PM
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