Gents, my rebuilder is offering me a choice of used crankshaft for my rebuild. One is thicker and the other seems tapered. Any Idea which one is newer/better. Also if anyone has a picture of proper paint colours on a 1927 engine that would be appreciated...Cheers, Joao
I'd forget a T crank and go with a standard SCAT. Worth the extra expense for the piece of mind, it won't break.
John, thanks but this rebuild is costing 6k and I can't justify spending another 1.5k. WTS I'm trying to pick the best option I can afford and have to take the risk?
The tapered throws were used 1909-24 and are considered slightly weaker than the 1924-27 design with straight and thicker throws. The radii at the ends of the rod journals were also larger on the '24-'27 cranks, giving them a slightly better chance to withstand metal fatigue. Many 26/27 cranks were made of "EE" steel and they're considered the best. You can tell from a marking in the throw or a stamping in the front end of the crank.
Here's a list of all the paints used on 1927 style engines: http://www.mtfca.com/encyclo/P-R.htm#paint2
An example of the paints can be seen on a cutaway display engine at the Henry Ford Museum:
Wow! Thanks Roger this information is amazing...cheers,Joao
Make sure your new crank is magnafluxed for cracks .
Joao, $6K and no crank?? I paid $6.3K a couple years ago and got a full rebuild of block and transmission with a SCAT crank, Z head, and Stipe camshaft. Seems to me with a price of $6K (even Canadian) you should be able to get a new crankshaft. I'd forego a couple non-essential items like high compression head, etc. that could be added later easily and get the SCAT crank. A new crank can save you more headaches down the road than any other piece.
Kevin, Thanks for the advice but I looked around and that's the best price I can find. It does include the used crank (magnafluxed) and the transmission rebuild as well. Cheers, joao
I wish I would of added a new crank to my last build I had no problems but will on this next motor build coming up! The more I think about, it just makes good economical sense.Tim
If your gonna keep the same T for along time or intend to drive a lot of miles as I do!!