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Author Topic: Power units???  (Read 405 times)

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Offline NC Logger

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Power units???
« on: May 09, 2021, 11:07:36 PM »
Looking for advice on which power unit would better serve my needs? I'm looking to replace a 6 cylinder gas engine with either a 4-53 detroit or a 4-71, I prefer detroit simply because I have alot of experience with them. The unit will be pulling a 00 frick mill, just wondering if the 53 would do the job or should I just buy the 71 for the extra power?

Offline nativewolf

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Re: Power units???
« Reply #1 on: May 10, 2021, 07:07:55 AM »
@moodnacreek another circle miller!
Liking Walnut

Offline moodnacreek

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Re: Power units???
« Reply #2 on: May 10, 2021, 07:54:24 AM »
4-53's are loud and fast. Getting the mandrel speed down will require a small driver on the power unit and a larger than normal on the mill. A 3 or 4 71 would be much nicer as it will not have to scream or need a 36" shive on the mill.

Online longtime lurker

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Re: Power units???
« Reply #3 on: May 10, 2021, 08:35:37 AM »
4-53's are loud and fast. Getting the mandrel speed down will require a small driver on the power unit and a larger than normal on the mill. A 3 or 4 71 would be much nicer as it will not have to scream or need a 36" shive on the mill.
^^^ what he said.
4-71's have a better selection of injectors available for industrial applications too. You'll be able to dial it right into the sweet spot between RPMs, torque and horsepower so it's loaded up at rim speed on your saw. N65's are just a default setting.
The quickest way to make a million dollars with a sawmill is to start with two million.

Offline NC Logger

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Re: Power units???
« Reply #4 on: May 10, 2021, 02:52:54 PM »
Good to know, 4-71 are fairly common around here.


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