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Author Topic: I want to run my 20HP twin at 1250 RPM.  (Read 3443 times)

cujet

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I want to run my 20HP twin at 1250 RPM.
« on: April 24, 2009, 07:11:14 PM »
I want to run my 1000RPM twin at 1250RPM. I have tried getting it to this RPM by pushing on the rack and carefully watching the engine. It runs just fine at that speed. In fact, I would say, it's a bit smoother.

Please avoid rants about flywheel safety. I can make or purchase a strong flywheel with the proper diameter for the speeds involved. A car tire spins faster than one of these flywheels.

What do you guys think?
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apogee_man

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Re: I want to run my 20HP twin at 1250 RPM.
« Reply #1 on: April 24, 2009, 07:42:29 PM »
I would say run the calcs for a cast iron flywheel at the given diameter and figure out if it's within the safety margin.

If so, I'd go for it.

Shouldn't hurt the engine I wouldn't think...

But, make sure to run the calcs...

Just my $.02,

Steve

cujet

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Re: I want to run my 20HP twin at 1250 RPM.
« Reply #2 on: April 24, 2009, 08:00:36 PM »
Why? Because I want to run the entire neighborhood with this thing.

Really, it's a bit down on power for my needs mid summer. The rest of the year I can run it really slow.

Chris
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buickanddeere

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Re: I want to run my 20HP twin at 1250 RPM.
« Reply #3 on: May 03, 2009, 08:20:42 AM »
  Going from 1000 to 1250 rpms increases centrifugal stress on the flywheels by 1.56 times.

  b&d

compig

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Re: I want to run my 20HP twin at 1250 RPM.
« Reply #4 on: May 03, 2009, 04:20:09 PM »
Try it , I'm certain that any problem issues will soon become apparent !!
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