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Quote:
Originally Posted by Dave in Boise
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I have a 31 coupe that seems to have a sweet spot at around 54-58 mph. It's an H&H with a balanced crank and flywheel and a tollitson carb.. Other than that I believe it is pretty stock. My 30 Tudor has a standard, no modifications motor on it with about 500 miles on it and it seems to be happier about 5 mph lower.. As far as I know, both have the same 3:78's out back..
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The difference in the sweet spot is probably the cam being used in the two engines.
Quote:
Originally Posted by Dave in Boise
<snip>
Someone told me (not sure I believe it) that you cannot blow up the motor, as the stock Zenith has enough air restriction so as to work like a governor..
Not sure I'd want to really test if that is true 
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I have heard the same thing.
Jim