Quote:
Originally Posted by pontifex4
Coming back to the point about the chain, if you spin it really fast, shouldn't centripetal force cause it to try to form a circle, rather than a loop whose top and bottom runs are more or less parallel?
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Armchair physics. There's a tension side and a slack side. The tension side will get tighter as the cams accelerate. You only get centripetal force when there is a change in direction. The tension side is traveling in a straight line until it goes around a sprocket. The tensioner has pads on BOTH sides to keep the slack and the tension sides tight. The bottom (smaller) pad is the tension side, the top is bigger because there's is more slapping around going on the slack side. You MIGHT get some intake cam advance but if the oil pressure feeds both sides then you'll get a lot more slapping around there.
I'm guessing whoever came up with this idea saw one of those tensioner delete kits for a Honda F4i bike motor. Those kits have to have the tension set when the engine is hot or you'll bend valves.
Any one could easily test this in about 20 minutes on dyno, taking off the valve cover, blocking off the oil feed and doing back to back runs. Curious but skeptical. You try it.