Posted by buickanddeere on January 06, 2014 at 15:53:33 from (209.240.119.130):
In Reply to: HP vs Cu. In. posted by Texasmark1 on January 06, 2014 at 14:04:46:
Combustion chamber shape and design. Port shape and design. Variable duration cams. Double overhead cams. Compression-Expansion ratio. Air/fuel and ignition via computer control. Improved metallurgy, casting and machining. Until the 1990's a gasoline engine grossing 1HP per cu" was a snarly finicky race engine that was short lived, wasted fuel and was expensive. Now the wife's run about econobox suv nets 182HP from 145cu". The 350cu" four barrel in the 1986 pickup nets 165HP while pinging on regular gas.
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