Originally Posted by Egor29
On the 3.0 pulley combo, I don't understand how you can get power by decressing the crank pully -20% but change the Alternator Pulley +20%. Wouldn't that just put you back at stock settings?
Well the alternator isn't direct weight on the crankshaft for one. But you also have to consider that the crank pulley is say 8 inches in diameter and if you reduce that by 20% it's only going to be 6 inches. The alternator pulley is only 2 inches or so and 20% added back onto that is only 2.4 inches. So you're still shedding significant weight in the process and spinning less.