Originally Posted by billvp
Have you custom machine down the stock supercharger pulley to a level which gives equal rwhp as the 178? Or is the C3 size the lowest to safely go (if so, for what reason)?
We haven't machined down a pulley to its limit, nor do we think there is enough material to go down to be equal to a 178. Our machinist did see we had at least a good 5-7mm more, about 62-64mm total.