Posted by RLP in Co. on January 28, 2018 at 12:15:10 from (97.32.3.204):
In Reply to: Re: Combustion Talk posted by showcrop on January 28, 2018 at 05:04:33:
Grinding off the eyebrows would do three things. One reduce the compression ratio (bad), decrease the area of the combustion chamber walls ( good), three, change the airflow around the valves from what the engineer designed, who knows? (good or bad) Ha ha Me, I would grind them off. If they had done much good, all engines would have them now days. Combustion chamber design is very interesting to me. I had a Mazda diesel pickup that had precombustion chambers. The best milage I could get was around 29 miles per gallon. Heck, Chevy diesel pickups that were much larger were getting 35 MPG. That's why I say that precombustion chambers don't work. Now on that huge motor I can see what they are trying to accomplish with the precombustion chambers. They inject a rich enough mixture, that will burn easily,into the precombustion chamber, then, the burning fuel enters into the main combustion chamber, which is very rich in oxygen, which should cause a more complete burn with no wasted fuel expelled in the exhaust. So, I can hardly wait to see if it works or not.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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