Quote:
Originally Posted by Synchro909
We were talking about wear on the skew gears at the cam shaft. If they fail, the engine will stop but like you say if the failure was at the tang, it would not and the bottom end would be toast.
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Just to be clear, I did not mention the gears. But, it is an issue with wear.
Some come out of motors and the gear has razor sharp teeth.
Ever notice how you need to keep tabs on the timing? Other than point wear, point cam wear, the drive gear teeth will also wear and contribute to timing losses.
The oil pressure rule of thumb of 10psi per 1000 rpm is not necessarily right or wrong. It depends on the application and the design of the bearings. The Model "A" and "B" are designed for very low pressure. The testing of the engine with very low pressures just confirms that fact.
FWIW, I ran 90psi in the race car once by accident. Not paying too much attention to the regulator after cleaning and reassembly. No problems or leaks.
But I did turn the pressure back down once I noticed it.
All good, lets see some of the motors on the road, John