On the aluminum shafts, how much hp is supported? It appears there are 3",3.5" and 4" in diameter. I wonder at what point a 4130 steel shaft becomes necessary.
I have made some calls to different places suggested.
I was told at my HP level a 3" chromemoly would be fine
If I went to a aluminum it would need to be a 3.5". the weight savings to 3.5 Alum from 3" steel would be approx 20%
I did not ask at what level the Steel would need to be used. By the sounds of it the larger aluminum will hold a lot of HP. Way over and above of what my 482 will produce.
I was also told I should step up to a 1350 pinion yoke.