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Kevin in NJ · 11-04-2016, 02:27 PM

Keep in mind, it is not RPMs that kill in an engine.

If the crank, rods and such are properly balanced the bearing are riding on the oil film and all is well.

It is when you have the stuff out of balance or the timing not set right for the load on the engine. Pre-detination is a big problem for the engine.

If you know you have the crank and everything balanced out well then do not be afraid to run higher RPM's.

That being said....
Too many engines are not even close to properly being balanced. There it does not matter, the engine vibrates a lot and you do not feel safe running fast. The bearings will not hold up if you drive it hard.

Keep in mind, the Model A from the Factory ran 60 MPH no problem. Yes, even on the crappy roads of the day people were running them that hard. Tells you something about how well built the car was originally.

11-04-2016, 02:27 PM	#8
Kevin in NJ Senior Member Join Date: May 2010 Location: South East NJ Posts: 3,398	Re: How fast in 2nd gear? Keep in mind, it is not RPMs that kill in an engine. If the crank, rods and such are properly balanced the bearing are riding on the oil film and all is well. It is when you have the stuff out of balance or the timing not set right for the load on the engine. Pre-detination is a big problem for the engine. If you know you have the crank and everything balanced out well then do not be afraid to run higher RPM's. That being said.... Too many engines are not even close to properly being balanced. There it does not matter, the engine vibrates a lot and you do not feel safe running fast. The bearings will not hold up if you drive it hard. Keep in mind, the Model A from the Factory ran 60 MPH no problem. Yes, even on the crappy roads of the day people were running them that hard. Tells you something about how well built the car was originally.