04socalTL

iTrader: (1)

I'm going to get a supercharger soon and have a question.
should i use the stock crank pulley or should i get the UR stock diameter pulley?
i heard that i shouldn't use the underdrive pulley with the SC

any suggestions?

bmeyer

iTrader: (3)

The issue with running the under drive pulley is that it's under driving the supercharger as well as the rest of the accessories, meaning that it's not producing full boost. IMHO, the only reason to run the under drive pulley is to reduce the parasitic loss that the accessories create. With the supercharger installed, you're not even going to notice the minuscule difference anyway. Just get the stardard size pulley.

04socalTL

iTrader: (1)

thanks for the info ^

swoosh

iTrader: (5)

stock sized, light weight !!!

InFaMouSLink

iTrader: (10)

AT or MT? if MT and plan on installing a lwfw then stay with stock pulley since the common practice is either LW pulley OR LWFW. the flywheel will yield more weight loss.

Excelerate

iTrader: (1)

As stated you must run the stock diameter lightweight crank pulley with the supercharger or it will underdrive the supercharger and reduce boost levels by 1-2 psi.

phatrick

Or run both

04socalTL

iTrader: (1)

thanks everyone for chiming in!
my TL is auto, for those who were wondering (i should've stated this in the 1st post)

bmeyer

iTrader: (3)

The issue with running both is that you lose any sort of dampening on the crank and will likely develop some some nasty vibrations in the motor. That is unless you're going to have the entire rotating assembly balanced.

I actually sold my ltw crank pulley once I got my new clutch setup.

veggiemonster

iTrader: (1)

usual rule of thumb is unless you built and balance the rotating assembly yourself, only modify one side of the engine

crank pulley or flywheel, but both is not advised as ^^^ stated