Re: Re: Re: Re: M piston size and turbo

Posted by Troy - MI on October 25, 2003 at 17:31:39 from (216.65.171.173):

In Reply to: Re: Re: Re: M piston size and turbo posted by Dr.EVIL on October 25, 2003 at 05:09:04:

Think about it. The position of the pistons match the firing order. Each piston in the order are 180 degrees from each other. 1 is 180 from 3 is 180 from 4 is 180 from 2. Changing the camshaft order to 1-4-2-3 would mean that piston 4 would be 180 degrees 'out of phase' WRT the cam. Same story for piston 2. The distributor timing could be changed to match cam timing by switching plug wire locations. But pistons 4 and 2 would be at the bottom of their cylinders when their plugs fire. If only the camshaft/plug wire timing were changed, you could get away with getting the engine to rotate in the opposite direction. This is how twin/four engine piston-powered aircraft engines are designed.

My first passion is building '60s Pontiac GTOs....I've tried so pretty strange stuff to get more HP. But forging and milling a new crankshaft is beyond my abilities.

Troy - P.E.

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