A cool old Popular mechanics article about 2 strokes ,WOW

[jus_me]

I stumbled upon this old popular mechanics article about hopping up your old snow mobile. I specifically find it interesting when they talk about the exhaust and how they don't know why or how an expansion chamber works but if they did they would be millionaires ..

Pages 138-141

http://books.google.com/books?id=HN...e&q=milling heads on snowmobile engine&f=true

 

[Blaaster]

I was particularly interested in the golf balling of the piston for added oil retention.

 

[jus_me]

I was particularly interested in the golf balling of the piston for added oil retention.

I thought that was interesting too..

I just realized this was written published in 1969,, Waaaaaaay before my time.

 

[Larry's Shee]

All I can say is WOW. What were you searching to run acrossed that?

Old school for sure. This was a couple years before Gorden Jennings published his book.
Jennings had a better method of oil retention. Cross hatching the piston with emery cloth, looked simular to honing in the cyl.

 

[C-H55Blasty]

Interesting read. Thanks for sharing!

 

[dirtysquared]

That was pretty cool. Good for a late night read

 

[Blaaster]

I cut my teeth on some of that stuff way back in 1955, when the length of the header pipe stub was cut to length to tune it!

Where stuffing of the crank with Epoxy was the norm!

Where powerbands were fitted around the twist throttle to stop your gloves slipping.

It was all seat of the pants, ass Dyno in them days!

 

[Iwantablaster]

Cool