Quote:
Originally Posted by Green-Eggs
Kits that drive from the crank pulley:
ESS (Vortech)
Evolve (Rotrex)
G-Power (ASA)
Harrop (Eaton)
VF (Vortech)
Kits that don't drive from the crank pulley and use their own pulley:
AA (Rotrex)
Gintani (Vortech)
Almost all kits on the market drive from the crank pulley, not the opposite.
Maybe you're referring to those who drive from the inner crank pulley instead of the crank accessory belt pulley? Evolve drives from the inner crank pulley, not sure about Harrop. Although I'd consider the inner crank pulley more risk for the engine because if the belt breaks, you lose the water pump as well. This is why most other kits don't do this.
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The way I understand the main bearing wear argument is that adding the SC to the accessory belt pulley adds downward force on the crankshaft, thus putting more load on the front main bearings causing them to wear faster. By using the inner crank pulley, the leverage is reduced. Perhaps I am misunderstanding something?
Which of the above kits would not put more load on the main bearings? Harrop and Evolve?