Thanks for that link, Wayne. You must be a Samba search genius! I spent some time over there over the past several days looking into options, and never found that thread. It nicely summarized all the misgivings I had about the CV based sensors, and the only people not complaining had the Fast Forward VSS.?
The GoWesty VSS seems to work fine in my application, though, as far as putting out a nice, clean 0-5V square wave. It's just that the Syncro speedo runs at double speed (thanks for pointing that out, Tom), and that causes the Subaru ECU to throw the rev limiter. From what I saw on their web site, GoWesty is very careful NOT to make any suitability statements with regard to their VSS in situations where an engine conversion is done. That should have been enough of a hint to keep looking.
Anyway, that Samba thread helps me feel a lot more confident about the Fast Forward VSS, which I purchased this morning, *before* reading your post! ;)
I'll post back once I've had a chance to install it and see how well it works.
