The Cal-look Lounge

what is exactly the benefits of this kind of pulleys?


muchas gracias amigos...

SON OF THE BEAN

here you can read some benefits and hints
sorry, poor scan quality

didi

You should also ask a crankshaft shop who works on VW cranks a lot, to tell or show you what those heavy front pulleys can do to the nose of the crank. Its not always a win-win....

"The adding of weight in nothing new in automotive applications.  Chevy, Ford, and many cars install a Harmonic balancer damper on the nose end of the crankshaft to absorb some of the engine's harmonic vibrations (nodes)."

This is true.  When a cylinder at the opposite end of the crank from the flywheel fires, the crankshaft tends to wind up a bit.  Then this winding up releases, creating the harmonic vibrations.  This problem is worse as the crankshaft gets longer.  Less so with a short crank.

Guess who has the shortest 4 cylinder crankshaft of all?

I do like the fact that they are ever so slightly larger than the aftermarket "stock size" pulleys, and getting closer to balancing the weight on each end of the crankshaft does sound like a good idea theoretically.


I've heard of bad things happening on race motors, and HIGH powered street cars, but for the average street engine??

I look at them as a big waist of money, my street to race engines range from 200 to 500 plus HP with zero main bearing problems, I do recommend using a hub pulley for looks and just an all around better and stronger pulley.

What about the Berg pulley ? Is it good ?

My old balancer told me he thought they were the best thing that they came up with for the VW. He described it, as the flywheel wanting to turn the crank into a gyro on a non equalizer engine.

I like the idea of a steel nose of pulley against steel crank. I used to have aluminum aftermarket pulleys get wallowy after a few years, especially at keyway. I like that the Berg pulleys go on TIGHT.

I guess I'll throw a wrench into the werks and ask what this is?  It measures 5 3/4 max dia. just under 2.7 lbs., chrome over steel. Second question,
it appears to have been balanced, so can I or should I use this. Your opinions are welcome as these pulleys are post my experience. And yes, someone
removed it with a hammer and screwdriver.

i heard the same from local "old time" racers :-\

so definetly this is a big waste of money...........i think you are right mr. luppino.


gracias amigos!


THE BIG BEAN THEORY

I have used one once, that and the crank sits on the "offerings to the gods of speed" shelve...

Will there be less twisting of the crank if it has two flywheels?

I have used them for years without problems. After taking my motor apart, bearing surface's were very good. Could have used them again if I wanted to.

Ted

Good point. Most of the engines I know have only one flywheel.

The point is that what can an average user say? I have used it and had no problems (that I could notice and connect to the pulley)? What if a said user had a usual, light pulley? Would it change anything? We will never know.

When I first heard about those pulleys, my first thought was - you pay for having flywheel lightened just to have a heavy pulley installed?

The problem is that they are sold by BERG. So they must be good. ;)

From reading the BERG text I thought that they were there to do something with the critical harmonic vibration. And the only way I can see them doing that is that they somehow change the harmonics frequency, and move it out of the range of the engine so to say...
Ohh well, never mind....  :)