Quote:
Originally Posted by nkaminar
Notice that John Neilson's engine has the two forward pistons moving in unison and the two aft pistons moving in unison. The firing order for this engine can be 1-3-2-4 or 1-4-2-3. The reason for doing this is so that the shared intake ports at the front alternate with the shared intake ports at the rear. This makes the engine breath better. With the normal crankshaft the front intake port sucks twice then the rear intake port sucks twice.
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Very observant good job
Winfield did this a few years ago
Called two up two down
Sort of a poor mans 4 port motor
And yes, much more efficient than normal crank
J