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12-20-2019, 01:34 PM | #1 |
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rod journal size vs rpm
I know the smaller the better but,what would someone say the highest rpm someone could turn a steel 2.123 sbf rod crankshaft without issue. Thanks
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12-20-2019, 02:12 PM | #2 |
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Re: rod journal size vs rpm
all the small block fords are steel which one stock or after market,I have turned mine 10,000 at times mostly 9,000 to 9,500
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Everett Hill 2134 STK, SS |
12-20-2019, 08:53 PM | #4 | |
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Re: rod journal size vs rpm
Quote:
That is about the surface speed of the bearing against the crank. Smaller crank journal diameter reduced the speed of the bearing against the surface of the crank. Of course, you can usually get by with high surface speeds. Lower speeds improve reliability. “Honda rods” did not make mine any faster, but did reduce bearing wear. Your results may vary.
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Ed Wright 4156 SS/JA |
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12-21-2019, 06:25 PM | #5 |
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Re: rod journal size vs rpm
How much power (or torque) can be run through the small journals? I bought a set of Crower rods with the Quad 4 bearing size. I would think the rear journal would take the most power (torque) through them, but only one cylinder is firing at a time.
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Mopar 2 Ya! |
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