Quote:
Originally Posted by Bobby Zlatkin
Jim K: An offset bushing won't do it for me. They can give you 4 - 6 deg. and I need more than that.
I have a Speed Pro timing gear set with a 3 keyway crank gear. But again, that doesn't give me enough.
I understand that the crankshaft teeth are 20 deg. each and the cam gear teeth are 10 deg. each.
What I don't understand is how moving the cam gear one tooth moves the cam 20 deg. I never was very good at math, but this is something I just can't get my head around.
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10 crankshaft degrees are 20 camshaft degrees. The cam or cams rotate at half the crank speed.
On my motor one cam gear tooth is 18 degrees. But it is only 9 crankshaft degrees. So I I'm a tooth off I'm off 9 degrees. This was easy in my case due to cutting the block and head. The marks were wrong in either direction. Had to move the cams a bunch to get them both straight up. With 2 cams it is harder because you line up the intake, but that doesn't mean the exhaust is right. I was running for a year with my exhaust cam 9 degrees (one tooth) retarded.