Information on ATI harmonic balancer
 

Do you know how the weight of the ATI damper compares to stock one, and if the diameter is the same?
Thanks!

It is heavier, and the diameter is identical.

7.07" diameter is 10% underdrive compared to the stock FA20 crank pulley
6.2lbs vs stock 4.87lbs

Consider the Fluidampr. As an owner I’m very impressed..

Would you be able to quantify the change? Is it easily perceived?

Thanks.

Not at all.
Unless you are the type of person to add a catback pick up maybe 1whp and say you noticed a dramatic seat of the pants butt dyno improvement to performance lol. The improvement to "smoothness" really isn't noticeable.

There is some testing data, and sound theory/logic behind the concept and what it does, and that it should be beneficial. but realistically there is little point especially if you are NA and/or stock block.

Thanks everybody, but definetly not interested in putting in a heavier pulley than stock.