new owner with ?'s

[dizzygoat]

just traded the goat in on an 04 black L 46k miles.

Is there anywhere that translates the pulley size to blower rpm. Because ill be honest the word "boost" and 4lb lower doesnt say much about how hard these units are working.

My goat was magnacharged with a more or less same unit. However, i was spinning mine at almost 20k rpm and that was about its max because of iat's. It made a whopping 8psi.

 

[FROGFORDFAN]

Rick or Linn at Amazon tuning probably can help

 

[Cialis]

I wouldnt concern yourself too much with blower rpm. The largest pulley anyone would recommend on these is a 6# lower and youll be pumping about 14-15lbs of boost and only get heat soaked after a couple back to back runs.
With some really good cooling mods you may try an 8# lower.
Find out the pulley diameters and you can do the math yourself. Really useless info IMO.

 

[dizzygoat]

thanks guys!

 

[Fade 2 Black]

Lower pulley diameter divided by upper pulley diameter equates to the overdrive of the supercharger relative to crank speed.

Lower pulley is 9" (6 pound lower) and upper is stock (2.93" or 3" for argument's sake) then your driving the blower at 3 times crank speed. Most stock trucks when tuned will shift at 5400-5600 rpm so the blower would be turning at 3 times that or 16,200 to 16,800 RPM at the shift point. That's about as fast as you'd want to spin one until it gets ported and then you can up it another 1K or so.

:beer: