Quote:
Originally Posted by sowise
Contacted Perrinperformance and here's what they have to say...
The argument that the reduced weight and removal of the rubber ring will destroy the front main bearing is wrong! The rubber ring between the two halves of the stock pulley is to make up for mfr. differences. Two cheap cast pieces pressed together with rubber allows for additional slop in both. If Subaru chose to install a pulley like ours would add significant cost to the engine and is not cost effective for a production piece. The rubber ring is NOT a harmonic balancer! You should go to your car and let it idle. Raise the hood and note how the belts will track side to side and up and down. This is a result of the much less than precise pulley found from the factory. This causes undue stress and wear not only on the pulleys but on the belts and accessories as well. Installation of our pulley will result in smooth, true, and long lasting belt wear and accessory lifespan is increased. Plus, throttle response, HP and torque are all increased dramatically for such an inexpensive painless part.
Crank bearings, and rod bearings are much more prone to premature wearout from increasing boost than from installation of a precision made billet pulley. This should not be a concern."
Plus:
"The main reason for a dampener is to help prevent crank walk and since the engine does not have to fight gravity in its running cycle there is no crank walk and hence no need for a dampening system."
Basically you can search all day long and find arguments on both sides of the fence, to each their own though. I am not doing anything crazy with my engine or going for excessive HP or SC/Turbo, so I am fairly certain this is a mod that will do what is intended for my purpose. Besides I wasn't promoting or pushing the lightweight one, I was offering my original one for basically the price of shipping.
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Well that is a nice bag full o' crap right there.
This IS a harmonic balancer, not the rubber itself, not the inner and outer pulleys but them alltogether. It has nothing to do with tolerances and balance (it's actually harder to balance a hamonic balancer than an aluminum pulley). And manufacturing a balancer costs more than machining a pulley like theirs. The harmonic balancer is there to scramble harmonics that would otherwise build on to make the rotating assembly vibrate at its natural harmonic frequency.
They'll say anything to sell their stuff. I personnaly went along with a Fluidampr like shown by SVXcess on my 4G63. I wouldn't risk it on a 4 inline, so not a chance I'd risk it on an H6.