If you will not tell them that they will destroy their motor. I will say they are subjecting your engine to harmful harmonic vibrations and run the risk of destroying their motor.
I don't know what is on every make, model, engine. But all the pulley's that mount to the front of the engine have considerable weight (factory). That weight is there for a very specific reason. That is to dampen the force vibrations from combustion. A single peice snout is better that a light weight one. It is designed to remove the worse of the harmonic vibrations. The second best design is a 2 piece with an Oring or rubber this rubber will absorb a wider range of vibrations. The best design available today is a damper that is sealed with silicon fluid.
Why? Because the critical frequency's change with speed, load, ect.
I think the confusion comes into play when the word balance is used. This has nothing to do with balancing. We can balance a wheel or any other recipocating object. but when we put varying tortional loads on the same object all the balancing in the world will not remove them. All the rotaing items in an engine are balenced. Flywheels, driveshafts, crankshafts, torque converters, wheels, and on and on. We even weight balance rods and pistons. So what are lightened pulley's for racing, when you are going to rebuild soon as to later.
This is from the unorthodox site:
"The pulleys on most of the new import and smaller domestic engines have an elastomer (rubber ring) incorporated into the pulley that looks similar to a harmonic damper. The elastomer in the OEM pulley serves as an isolator, which is there to suppress natural vibration and noise from the engine itself, the A/C compressor, P/S pump, and alternator. This is what the manufacturers call NVH (Noise Vibration & Harshness) when referring to noticeable noise and vibration in the passenger compartment. It is important to note that in these applications, this elastomer is somewhat inadequate in size, as well as life span, to act as an effective torsional damper. If you look at the pulleys on some of the imports there is no rubber to be found at all. We have samples of these, mostly from Acura/Honda, the Nissan Altima, 1.8L Eclipse, 2.3L Fords, Chrysler 2.2L's, and 1.8L VW's, to mention a few. This is not to say that with our pulleys you will hear a ton of noise or feel more vibration from your engine compartment. Most who have installed and driven a vehicle with our pulleys will notice the engine actually feels smoother. This is a natural result of replacing the heavy steel crank pulley with a CNC-machined aluminum pulley. NVH is variable and unique to every car. NVH will increase with the installation of an aftermarket intake and/or exhaust, for example. Think of OEM intake systems in newer cars, they use baffles and resonators in the intake to quiet all the intake noise. Aftermarket intakes eliminate these resonators and create dramatic increases in engine noise from the throttle opening and closing. So to most tuners, certain types of NVH can make the driving experience more enjoyable.
The purpose of a traditional harmonic damper is to protect against crank failure from torsional movement. This is not necessary in most modern engines because of the many advances in engine design and materials. Factors such as stroke, displacement, inline, V configurations, power output, etc., do determine when and how these harmonics and torsional movements occur."
The Engineers have a specific reason to have a damper on the snout of the crank. Every object has frequency's that are more harmful than others. Unorthodox is maketing their product and show you the HP gain and the torque gain. Ever wonder why they don't provide a Vibration study? They are well aware of the debate that is going on. If you owned the company wouldn't you dispell the "rumors" With hard fact and test data...... Bet your a$$ you would....
