Some Thoughts On Slant Geometry

Just as a general comment to add: The actual effect on torque is more than just the duration of the burn; even if you extend the burn time of the same amount of fuel energy, then the combustion pressure will be lower (since the fuel is burning more slowly) and the net effect over a longer duration can go either way.

I am not sure I am understanding this:

whitepunkonnitro said

So, at a total of (again, just round number example) 35 degrees effective pressure pulse per total volume of fuel in the chamber, if one was to shorten the rod, piston speed would increase, but total time for the event would decrease. The duration of burn would be more effective for more degrees of crankshaft rotation. That equals torque.

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So are you saying that you think that the effective, or net, torque output will be higher, since the pressure will act more effective even though it is a shorter time?

I have been assuming you are looking at a short rod to get higher piston velocity at lower RPM's for better cylinder fill there, and giving up the higher RPM end a bit, to better match the head. Yes? No?