Posted by 135 Fan on January 28, 2011 at 14:00:32 from (68.149.56.30):
In Reply to: HP??? posted by dave2 on January 28, 2011 at 13:32:13:
Torque and torque rise(lugging power) has to be a factor. Number of cylinders doesn't make much difference. Look how many semi-trucks run 6 cylinder engines compared to V-8's. In your example, 4 extra HP might be all you need but just because the one engine has an extra cylinder makes no difference. You could even have the 4 cylinder in the lower HP tractor and the 3 cylinder with more HP. More HP and/or torque makes the difference, not number of cylinders. You can usually get more HP out of bigger displacement but then you can run into reliabilty problems. A turbo can squeeze the same or more power out of a smaller, lighter engine and still provide good reliability. Dave
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