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Now if you will Stan, redo the calculation for 35% squish area to
obtain a result of MSV 47.690 m/s by opening the squish clearance.
The picture that emerges is the engine builder is able to control MSV
to the levels that suit the need by using squish area and clearance. In
addition with the dish piston the bottom of the chamber is opened allowing
more area for flame growth. I would think this has some positive influence
on the early stages of flame development before MSV @ 9.035 BTDC.
Comments?
Here's a quote that fits right in, I can't remember where this is from
perhaps Professor Blair.
"For high-performance engines, such as those used for racing, the design of
squish action must be carried out by a judicious combination of theory and
experimentation. If the MSV is too high the mass trapped in the end zones
of the squish band may be sufficiently large and, with the faster flame front
velocities engendered by a too-rapid squish action, may still induce
detonation in a worst-case scenario or slow end-zone burning at best.
Stan, thanks for sharing you software with us!
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