Alright, I'm looking for some input from the supercharged guys. heres some background. I bought a used Vortech kit (w/ ~12,000 Miles) with an Ultimate racing FMIC kit (i realize that an aftercooler with a large heat exchanger is most likely the best way to go for maximum power, but the kit was a good price and I do prefer the underhood look without the aftercooler). anyway, the supercharger came with a 3.8" pulley which puts me around 51150 RPM at redline. A 3.6" pulley would put me at 54,000 RPM (which is overspinning the blower by 1000rpm, it would be overspinning from about 8850 rpm till 9000 rpm so it will only be for a very short time at the top of each gear) so I'm looking for input from people who have either over spun their blower or haven't gone to a smaller pulley and maybe regretted it later or anyone else with some input.
since i still have to install everything it will be very easy to change the pulley now and if i decide to change it after everything is installed and tuned, It will be a bit more work to change the pulley (not a big deal really) but i will have to pay for a retune.
So what would you guys do? leave it at 3.8" or go with the 3.6"

 

I'm running 3.6" pulley making 14.5 psi in my AP1. These blowers love being overspun it seems. I wouldn't worry about it at all. I bought my vortech kit used with 10k miles and I've put 65k on it since then. Still going strong.

 

You don't carry any pullies, do you? If you do, I'll just add it into my order from black Friday. If not where is a good place to order from?

 

I don't unfortunately. For pullies contact ASP racing that's what I'm using.

 

Vortech sells the 3.6
http://www.vortechsuperchargers.com/page.php?id=30042

If you are worried about over spinning the blower with the 3.6, you could always lower your rev limiter with whatever engine management you are running.

 

What differential are you boosted peeps running? I'm asking because I have a comptech differential housing and I'm about to have an SOS stage 2 installed. Wondering if this bad boy will suffice

 

Oem son. Oem. Really depends on what you are doing. My oem has survived being boosted for over 20k miles so far.

 

Don't go with the vortech pullies. They don't have lips to prevent belt from wondering off. On stock 5" pulley my belt wondered off and got shredded. Pain replacing belts with vortech kit.

 

Good to know, I sent an email to asp. Is it just me or does there website have hardly any info on it. Couldn't find much for pullies (nothing that would fit what I need)

 

Also. I'm not sure where to find best info. Is there enough adjustment in the tensioner that the belt from my 3.8" pulley would fit? Or what (or where do I find) size belt is needed for the 3.6" pulley?