I almost jumped in this thread but where to start. The major issue is that theory never extrapolates well. With variables including all those inputs needed for accurate fuel injection, to the timing of spark within the confines of flame travel piston location temps and turbulence (among others)under control, and pumping efficiencies known, predicting real world outcomes is difficult. Thus the dyno becomes a debunker of the random folklore. It also provides an opportunity to melt or tangle internal components not designed to run at twice speed! Jim
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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