Quote:
Originally Posted by blackrosenova400
How I understand it is this. Sound can shatter glass at the right frequency and db level. Each time the piston is on its power stroke it flexes the crankshaft and then the crankshaft reverts back to its original state. At 6000 rpm, that would be 100 hertz, or 100 times a second. Its a low frequency but the load is pretty high. The crankshaft will shatter or split/crack at its tuned frequency, just like a glass. Now fill the glass with rubber, it will no longer shatter at its tuned frequency. The damper takes those vibrations and eliminates it as heat.
Me, I bought a fluidamper for my 2.4 because I got sick of the stock damper cracking and slipping on my 1g. Id never run an undampend crank.
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Can you prove any of that? You tube video of a crankshaft shattering at some frequency produced mechanically or via air?
The quest pulley is a solid piece, and while I haven't cut one in half to really verify, it's obvious it's a fully machined unit and not assembled or built around rubber rings or fluid. I personally wouldn't worry about a solid pulley, and if you ever did reach the resonant frequency of the crankshaft just by running it (which you probably won't) you'd only be there for a split second, then the RPM's change.
In my completely uneducated guess, I bet it helps with load changes from alternators, PS pumps and A/C compressors more than anything else. If your crank is vibrating, a damper outside the engine where the bearings aren't will do what, exactly?