Hello, Any info would be very helpful. Does anyone know what the difference is between the SN93 and SN2000 chargers? I think the drive is different but what about it is different? I assume that SN93 is for 1993 and SN2000 is for the years? Also are the VR4 available anymore? Thanks

www.superchargerhelp.com

you can find VR4's but they are difficult to find. Craig @ paradise wheels sometimes finds the VR4 upgrade kits and sells them for $700 bucks.

sn93 and 2000 are similar, just a few differences of how the internals put pressure on the ball drive.

Thanks for the info, I did contact paradise wheel and they wanted $1400 for the upgrade! It might be rare but with the new technology out there the price make it useless.
Oh well.
So is the SN2000 a better design that is more durable?

I had two VR4's! the first time I had the upgrade kit, I could not get more than 8psi boost! soo many factors to make the VR4 to run right. I later ran into another vr4 for a good price, then purchased an 8 rib belt system so I could get more belt grip. The vr4 causes massive belt slippage due to the resistance of the ball drive. With the 8 rib set up, I could almost get 11psi but my belt would still slip. I soon sold the VR4 a second time. I had to constantly rebuild my vr4 because the increased tenstion on the ball drive would eat the bearings, I could never seem to get consistant boost out of mine. I have friends who have the vr4 and have had good luck with there kits, mostly mustang guys. I finally sold it, got an NX N2O kit with a harris progressive controller and now my Z is where I want it to be. If you get a paxton for a good price, they are an ok supercharger. I got mine from a friend and he upgraded to a procharger. In the long run, I wish I would I had paid the extra cash and purchased a procharger