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Old 10-13-2008, 01:15 PM   #63
DanB
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Join Date: Apr 2006
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Re: Head differences

Quote:
Originally Posted by beckerb View Post
You will hear a lot more then just a tick !!! How about a heavy rattle - Or at least that has been my experience. I have been building cars, racing, and blowing things up for over 40 years which includes a number of pro-stock cars in my earlier years....


You are correct to some degree. You see the piston skirts are so small and the blocks are so soft that it does not take much to oval the cylinder with this combination it does not take much to causes the piston to rock back and forth. The amount of cylinder pressure will stabilize the piston enough to deaden the noise to some degree however as the problem gets worse the noise becomes more pronounced. Also most people can’t tell the deference between a Tick (rocker or lifter noise and piston slap) that is the reason why ford is getting away with a .005 thou mill on the head that bumps the combustion pressure thus stabilizing the piston some what enough to have the customer go away.

As for work experience I highly doubt there was a cause to post that.
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