auto2665
Extreme
I'm new to the SC scene and I'm trying to understand a little about how the pulleys work on the superchargers. For example the pulleys I have on my MPI kit are 28/28 and this produces x amount of psi. What pulley needs to be changed to lower boost so I can ride in lower elevation?
Riceburner
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Making Drive pully smaller or driven pully bigger will both have the desired effect . Or a combination of both.
nate007
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Think of it like changing gears on a 10 speed bike. The different ratios will make the blower spin faster or slower in relation to crankshaft speed.
I'm not the best with knowing MPI's pulley combos, but I think a 28/28 should be giving you around 5-7 psi, right? What are you trying to lower it to? If you ride NE you're at a similar elevation to me, and I've got a buddy with an MPI running 27/29, that only making about 3-4 psi on an non-intercooled kit.
To lower your boost from wherever it's at now, either smaller on the bottom OR bigger on the top will lower the boost for you though.
I'm not the best with knowing MPI's pulley combos, but I think a 28/28 should be giving you around 5-7 psi, right? What are you trying to lower it to? If you ride NE you're at a similar elevation to me, and I've got a buddy with an MPI running 27/29, that only making about 3-4 psi on an non-intercooled kit.
To lower your boost from wherever it's at now, either smaller on the bottom OR bigger on the top will lower the boost for you though.
