Posted by pete 23 on July 24, 2010 at 21:51:17 from (173.87.9.228):
In Reply to: gasoline octane.. posted by mike paulson on July 24, 2010 at 12:15:57:
Octane of gasoline is like progression in smokeless gun powder. The higher the octane or more progressive the powder is the slower it burns. Higher compression causes fuel to burn faster so we slow it down to arrive at the same approximate time frame of combustion as a lower compression engine with lower octane . Gun powder, the heavier the load, higher pressure so we slow it to control it. Very similar situation.
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Today's Featured Article - Fabricating Sidesheets - by Chris Pratt. The easiest and best first-time project for wanna-be sheet-metal workers like myself is flat or nearly flat metal cut and drilled to be a tractor's sidesheet. A sidesheet is sheetmetal to cover either the engine as in the case of early Oliver's, Massey-Harris' and many crawlers or the wiring and electrical components as in the case of the Massey-Harris Pony, Allis Chalmers' D Series (D-14, D-15, D-12, D-10, D-17, and D-19). The need for fabricating becomes obvious when you go to buy any of these
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