Yes Rich Thomson had ASP do the first set of cog pulleys. They were a combo type deal that used a rib belt from the crankshaft to the jackshaft and a cog belt from the jackshaft to the supercharger. That design also used the factory spring loaded tensioner. In other words it was a cog supercharger pulley and a rib/cog jackshaft pulley for the $450.00 or whatever is was, I've tried to forget the dollar part of this deal.
We ran it on the dyno and found out that the belt still sliped at the crankshaft side and the factory tensioner would not hold the cog type belt. ASP used what is known as a Hobb tool to cut the cog slots and that tool will not work on the small side of a step pulley like the jackshaft pulley, so we did that opration with a CNC mill. We also fabricated mechanical tensioners to work with the cog belts. The revised design is coged all the way.
So yes the origanel idea started out as a $450.00 pulley set but like more often than not it turned into a lot more. The only pulley from that deal that we were able to use in the end was the supercharger pulley itself.
Don't take me wrong I am not saying what ASP and Rich did was all wrong, that is just a part of development , it had to start some where. I guess the point I am trying to make is we did not buy a set of $450.00 pulleys and make a $1,050.00 profit from retailing them.
Also just to clear the air so to speak I don't think a cog pulley set in it self would put any one in the elevens, this is nothin' fancy. If you are on the edge and your supercharger belt is sliping then it would be one more part towards helping you hang on to that last bit of boost. For most people there are better places to invest your money, in other words this would be one of the later components you would need in a all out Supercoupe build up.
I am not a good salesman so I won't try to sale everyone on cog pulleys but if anyone thinks they are at the point of needing a cog set call us and we will be glad to help.
Thank's Coy Miller.