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Original Message
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| RE: rpm limts of stroker cranks |
| By Drew - 11/22/2005 2:12:18 PM; IP 24.180.36.150 |
To calculate your piston speed use the following formula:
2 x (Stroke/12) x RPM
This number should be less than 3000 Feet Per Minute to be ultimately safe, but 3500 is also acceptable. Anything higher than this will cause stress on the engine and is typically considered a race application.
A little rearranging of the equation yields:
3000 (or 3500) / (2 x Stroke/12) = Max Safe RPM
For your application, I happen to know the numbers because I calculated them during my 428 stroker buildup. Max RPM Range 4300-5000 RPM.
Hope that this helps. |
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