Posted by Colin on October 21, 2003 at 00:30:22:
In Reply to: Choosing inboard transmissions, How? posted by Jamie on October 19, 2003 at 15:37:51:
: Hello, I'm new to boating in general and want to build a Cracker Box with a transmission. I see differant ratios listed for BW Velvet Drives. We are using a 400+hp Ford 351W engine. How do I decide which ratio is best for my boat? 1:1, 1.91:1, 2.??:1. I hope this doesn't seem like a dumb question. I am an experianced automotive mechanic, and woodworker.
My research says for light boats, go for the 1:1 for faster prop speeds. The 1:1 has only a single shaft, therefore lighter and smaller as well. The 71c for big blocks, the 70c for small blocks.(Borg & Warner)