http://www.z1auto.com/prodmore.asp?m...ine&prodid=718

let us know if you need it!

 

I have an unorthodox pulley set on my car and I have so much current running thru my multiple amps and power caps, 4 lcd's, etc and have never had a problem. Everything runs great and you get gains from swapping your factory pulleys.

 

is that with underdriven?

 

You make the decision.

The Facts

1) The stock crank pulley is two piece unit with a sandwiched elastomer ring.

2) The elastomer ring serves as a damper for certain order crank vibrations that occur during various rpms under load.

3) The clutch assembly or torque converter serves as the damper on the other end of the crank.

4) The VQ series is very beefy with 4 bolt mains and a crank girdle which makes the entire motor, including the crank, very strong.

5) Removing the dampening capability pulley can cause vibrations across the crank. These vibrations can then impact the valve timing and ultimately power.

6) No one has yet so show proof on the strip that the VQ35 pulley works.

7) Do not trust engineering speak from the billet pulley manufacturers because they claim the OEM is not a damper. This is completely wrong.

8) No VQs have been destroyed by a UDP/lightened pulley assuming the pulley was manufactured correctly with a steel key.

9) The VQ is internally balanced just like any motor built after the 1980s. The concern is what the engine, specifically the crank, does when explosions hit the pistons. These explosions place tremendous forces on the pistons, rods, and then the crank. As the explosions increase, rpms increase. As the rpms increase, certain order vibrations occur across the crank. To quell these vibrations, engineers use dampened crank pulleys as well as the cluth/TC on the other end. The term "internally balanced" is a moot point. Be VERY cautious when a manufacturer or vendor tells you "oh, the engine is internally balanced, it doesn't need dampers on the crank". This is not true and completely questions their true automotive knowledge.

10) Underdriving a crank pulley will result is very minimal gains, if any. The biggest accessory drain on the engine is the water pump and that is driven by the timing chain. The AC is the second biggest source of drain and that pulley is free wheeling when the compressor isn't engaged. The alternator can cause significant drain, but the pulley is already very small.

 

^here we go again.