Crankshaft Identification

[Mark Chaffin]

Hi guys. Need some help verifying these crankshafts. These came from a long time speedster collector. The top crankshaft is obviously Model T. I believe the middle and bottom crankshafts were other manufacturer; however, often used in the Model T to improve the strength of the bottom end when building a performance engine. I believe the middle crankshaft is the Chevrolet and the bottom is the rare Wiils St. Clair as seen in this previous post http://www.mtfca.com/discus/messages/17 ... 1301087651
The rods and mains on the bottom crankshaft measure 1.720 across the board. It is drilled for oil pressure. Your thoughts much appreciated.

[Mark Gregush]

The middle one is Chevrolet 4 cylinder thru 1925 to 1928.

[Duey_C]

Quite correct about that tough "springy" Chevrolet shaft in the middle.
I'd bet a cold beer or a hot coffee that the Chevy shaft is bent and might need a peening to get him back to straight.
.120 thou in the other direction and he just laughed at me.
Very neat pics!

[Mark Chaffin]

Thank you for the comments. Here is a picture from a MTFCA forum topic regarding crankshafts which shows the Wills St. Claire crankshaft compared to the SCAT and Model A conversions.

Here is also the link to that discussion.

http://www.mtfca.com/discus/messages/25 ... 1331537671

Both the Chevrolet and Wills St. Claire crankshafts will be made available for purchase in the classifieds. What would be considered a fair asking price for each? As always, you advise is appreciated.

[Mark Gregush]

Sorry cant help with the Chevrolet, the two I have I got free. One was in a complete engine. Might check eBay in the sold section to get idea of trending.

[Rich Eagle]

Just for grins, this is what Maxwell was doing about that time period.

[2nighthawks]

Hmmm,....."interesting" Rich. I don't believe that what you posted is a photograph of an actual crankshaft. It doesn't look like a "drawing" either, but must be some kind of an "artists conception", because as shown, there is no center main bearing! Could that be right? Weird!

[Rich Eagle]

It is out of the parts book for 1915. Here are pictures of my actual engine. Yes! Weird! And it runs pretty well.
Rich

[Duey_C]

Mark, did you find a benchmark yet?
The last '28 Chevrolet engine I bought (3-4 years ago) cost me 300 so... Gotta be worth a 50? Probly more. I'm out of touch.
Hope that helps.
Rich, that's neat! IH used cranks like that on some of their tractors in the 20's & 30's. Big heavy shafts on two large ball units.

[hah]

Mr. Ed knows crankshaft identification......lol!!!