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t-head · 06-15-2010, 06:39 PM

I may come back to Robert Roof's chassis pieces later but before I finish up for now I want to show two of the most important T innovations he came up with.

We will cover racing crankshafts later after cylinder heads but you need to see what he came up with to solve the broken crankshaft problem. He probably had castings made which were then machined to fit. He somehow machined the inside of the block to hold these pieces that where then bolted in.

A three main crank in a four will always wear the center main more than the others. It also is not enough support and what he came up with was the ultimate.

The other key was his ball bearing 4th main which when set up in good alignment with the crank was a big help in longevity and reduced friction.

I would be really interested in seeing a good picture of Roofs #2 & #3 crankshaft supports if anyone has one.

06-15-2010, 06:39 PM	#119
t-head Senior Member Join Date: Jun 2010 Location: In my machine shop. Posts: 1,047	Re: Model T Racing Thread I may come back to Robert Roof's chassis pieces later but before I finish up for now I want to show two of the most important T innovations he came up with. We will cover racing crankshafts later after cylinder heads but you need to see what he came up with to solve the broken crankshaft problem. He probably had castings made which were then machined to fit. He somehow machined the inside of the block to hold these pieces that where then bolted in. A three main crank in a four will always wear the center main more than the others. It also is not enough support and what he came up with was the ultimate. The other key was his ball bearing 4th main which when set up in good alignment with the crank was a big help in longevity and reduced friction. I would be really interested in seeing a good picture of Roofs #2 & #3 crankshaft supports if anyone has one. Last edited by t-head; 06-12-2011 at 11:02 AM.