I got an e-mail from Greg Frick from
Inland Empire Drive Line Service, he read this thread and asked that I'd post this on his behalf:
Quote:
The assumption made in the piece is that the builder wants to actually drive the car on the street. Everything in it is aimed at making a trip from Bangor, Maine to San Diego, CA. smoothly and free of vibrations.
A real Sherlock Holmes will eventually find that Spicer thinks you can live with 1.5 degrees of uncanceled u-joint working angle. We have found that Enthusiasts are not average people and that they will feel any uncanceled angle greater than 1/2 degree.
If it is an eighth or quarter mile car you, the driver, could put up with anything for the 6 to 14 seconds you are running down the track. The sad part is that your axles, rear end and transmission won't like it and will break sooner or later if there is a lot of uncanceled angle.
The CV that is being considered is not a great solution. Typically these are cast parts which wear out fast; in about 50,000 miles usually. Also, they will not run at zero degrees because of the spring inside them. In a drag race car they are hand grenades waiting to go off.
Finally, any time there is a conflict between mother nature's Physics and a desired set up, the Physics will prevail, sometimes at considerable cost to the owner. It is better to get it right regardless of what part of the project has to be modified or abandoned.
Hope this helps,
Greg
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