Ecotec ATI Super Damper install and new belt requirement.
Posted: Wed Jan 27, 2010 10:53 pm
If anyone is considering using an ATI Super Damper on their Ecotec be aware that the drive pulley is a larger diameter than stock,and will require a different belt, as it needs to be longer. The correct belt for either a Harrop or M62 Eaton (using a 2.95" or 3" pulley) is a 5060515,which is a Dayco number. The Super Damper is a great addition to even a stock motor as it dampens harmonic vibrations to a degree that the stock one cannot.The balancer on our cars also drive the oil pump gears,which have been known to break under racing conditions due to vibration. It is a tight fit on the crank,because it needs to be snug to absorb the vibrations.The pulley is an 8 rib,although ours only needs 6 of them,which will be fine. In theory,this larger pulley should add some HP, as it is spinning the blower about 10% faster.Not much,but it is a gain. I wish I had tried it on my M62 first,just to see the difference,but too late now. That is all.