formula31

Someone convince me of the need for one of these on a 450 hp, 5200 rpm externally balanced, blueprinted engine.

RumRunner

No need since they are no longer in business.

Just go with a good quality balancer.

formula31

Ah, no wonder they are showing up on ebay. I use the stock damper and have never known of it causing me a problem. Thanks.

pachangalpina

They are in business...under new ownership.

Personally, I perfer ATI.

dlbCheckmate

ATI doesn't make an 8 inch for the BBC. I went with the Fluid Dampner. Hope the new people bring them around.

mcollinstn

Still being made.

ATI or Fluidampr. Good money spent. Do it. Dont go to one of the import fluidampr copies. ATI or Fluidampr.

edb07

Sometimes a real problem to install and remove.

Iggy

Any harmonic balancer should be installed and removed with the proper tools.
And I don't mean a hammer or pry bar.

Some classes of NHRA racing require a Fluidamper or ATI balancer. The stock balancer can come apart and fly around. The rubber sandwich between the hub and outer ring can/will fail from extended high rpm use. Sometimes the outer ring will rotate throwing the timing marks off.

formula31

Good Money spent. Why? Ive only seen one reply that confirmed what I though. High rpm failures of stock balancer. Help me understand, is there another good reason for these besides the high rpm issues that I wont see?

Iggy

formula31, check these articles out. They may help you understand just what the harmonic balancer does.

The Damper Dance

Weighty Issues