black_knight

iTrader: (1)

I'm familiar with the function of the alternator pulley... the idea being to squeeze out a few hp by powering the accessories less. I hear that's basically "not worth it." But I hear the "crank" pulley is dyno proven and "worth it." But what exactly is a crank pulley and what am I trading off to get more power?

Also, is it easy/possible to install it myself? What tools are needed? I checked ls1howto and installuniversity and I can't find an install document...

Cal

iTrader: (1)

Nothing to lose, it's a win, especially on a M6 because they have a higher idle. The ASP crank pulley drives the acessories at 25% slower than stock. They have an alternator pulley that will slow down the alternator even more, or another one that will speed it back up. You need a 950 rpm idle to run both underdrive pulleys at once.

black_knight

iTrader: (1)

Ah, now I get it. Yes, I could see it being a plus on an m6 (like mine)

How about the install?

jrp

iTrader: (16)

realitively easy. just need a 3 arm pulley puller to remove it. a big *** breaker bar w/ 24mm socket to remove the stock bolt.

look on ls1howto.com in the cam/spring install and it shows you how to remove the pulley.