stillen lightweight crank pulley

RCZ

Hehe, the myth resurfaces. Harmonic Dampers is a never ending argument, like break-in.

We'll see what happens when I get it installed...

Oh and mine comes in tomorrow, I'll get pics up when I have it.

BlueR32

myth, as in fictional? torsional vibrations that lead to engine failure are definitely not myth.

harmonic amplification of such vibrations would occur at very specific rpms/frequencies, so their relevance in a passenger car, whose rpms vary constantly, is probably very low, hence the assumption that they are not needed or can be eliminated.

it IS a never ending argument, especially when people say things like "it didn't happen to me, so it must not be true," which is just as misleading as "stay away from this- i had an engine failure, so this part must have done it."

anecdotal/individual experiences mean nothing except as part of controlled study. unfortunately, such study is essentially never done with aftermarket car parts. so, we are left with having to make such decisions on precious little worthwhile information.

i am just curious to know if the stock crank pulley has a harmonic damper. if it doesn't, there's not a reason in the world to avoid an underdrive pulley. if it does, people should make their decision mindful that someone thought it was a good idea.

RCZ

No, not as in fictional, but I'm glad it gave you a chance to explain that for the folks who didn't know what it was for....

What I was getting at is exactly what you said later on. That everyone always talks about it and the effects of not having one, yet it becomes an argument about whether or not the car needs it. Just like whether or not the car needs a babying period during break in.

I am glad you know your stuff, but that begs the question as to why you have an R32?

I am kidding.

I'll let you know if my motor vibrates itself into pieces in a couple months