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I'd love to say I understood all that, Lohring, but alas, it's beyond me. I have never understood the finnessing of 2 strokes. I'm just in awe of any hydroplane driver who, with his nose a few inches off the water can operate the adjustable tuned pipe length with one foot and the adjustable trim of the engine with the other. The torque difference of lengthening and shortening the pipe out of a bend and on a straight is noticeable.Thanks for taking the trouble to explain the principles.Cheers,Martin
The R/C flying community have supercharged engines like the YS140 FZ. This type of engine pumps mixture into the cylinder using crankcase compression, similar to a 2 stroke engine. The performance gains are modest.
The Ricardo company has a reprint available at a reasonable price. It's one of the most worthwhile books on the development of internal combustion engines.http://estore.ricardo.com/shop/the-high-speed-internal-combustion-engine/Lohring Miller
Some info many may not know. For every lb. of boost 7% more HP is generated. The intake stroke also pushes on the crank with this added pressure verses drawing in the air. With the added push from the pistons on the intake stroke the forced induction engines produce more torque and rev up a lot quicker. I know I had a 4-71 blower on a stock 350 SBC. Man would that mild engine come to life with the blower on it.Just thought I'd pass this info along.
That's £5.95p saved that I can spend on something else - more tools!