I was just wondering how much current lose you are going to have with an underdrive pully? I think my alt. might be going out anyway not for sure is there any easy way I could test to see if it isn't charging to what it should be
thanks for your time

 

I just got my underdrive pulleys, haven't put the on yet but they say on the box that they allow full charging and cooling capabilities. I got the BBK underdrive pulleys. As far as getting it tested to see if it is charging, I believe that Advance, Autozone etc. will test your charging system for free.







'98 Cobra
Stock.........so far.

 

The underdrive pullys work great. At least on my 01 Cobra. And there shouldn't be any difference in charging system. But if you stop really quick the engine may stall. Depends on speed. And it does seem to excilerate quicker.