What makes a race saw "hot"?

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mweba

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Admittedly not given this much thought. What are the physics involved? Flame, preignition, crown saturation? Squish band surface area to great or just plain lean mixture?
 
A change in a state of matter can have all sorts of byproducts one of which is heat unless that's what your after then it is the product. Energy realeased from this change can be in part heat as well as the force that is used. If you could have more of the energy in force and have less of it go into the heat byproduct you wil get more working efficiency.

Heat can be useful to warm up the fuel especially if you can get it just under the flash point just before igniton. Smokey Yunick did this in the 80's with a Fiero and got double the power with much better efficiency. But I believe his patent or at least idea was sold and we never really saw it put into the use that was predicted.
 
The condition in which the machine is maxing out its kinetic potential, leaving little room for any significant run time...

And there you have it...

See you Friday bro'...
 
The condition in which the machine is maxing out its kinetic potential, leaving little room for any significant run time...

And there you have it...

See you Friday bro'...

Well ya...and stuff
 
do you mean hot as in ouch thats hot or as in holy **** that things hot?:D

Well??? I would think nitro would have to be involved in "HOT"...
Only cause of the "this thing's gonna blow up in my hands" factor...
Otherwise, it's just a good runnin' saw...
 
Their looks!.....and don't touch the pipe after a run.....it is also "hot"!

001-21.jpg
 
Ok compression and rpm.

Well, I think that's the beginning but not the whole story? 240psi will build some heat but not as fast as "hotsaws" do.

I really don't know a whole lot on the subject.....bits and pieces as I don't build this type of engine.
 
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