Which ATI damper?
Which ATI damper? Looking to make a selection on what ATI damper to run, as there are lots available for the LS1. http://www.atiracing.com/products/da...ts/damserp.htm
From the standpoint of horsepower, the lightest and smallest one will provide for the least amount of parasitic losses. But is the 25% UD pulley less effective at damping than say a 10%? Similarly is a steel housing better than an aluminum housing in that respect? Or are differences there negligible? Trying to weigh all these parameters: material selection (weight), size, and their impact on parasitic losses and damping performance. The choice might not be ultra critical but I'd like to optimize my selection since I have the ability to do so.
I was considering PN# 917278, 10% UD made of aluminum that has a 10% UD ac pulley on the back of it. Anyone running this guy?
Thanks for any input,
Chuck
From the standpoint of horsepower, the lightest and smallest one will provide for the least amount of parasitic losses. But is the 25% UD pulley less effective at damping than say a 10%? Similarly is a steel housing better than an aluminum housing in that respect? Or are differences there negligible? Trying to weigh all these parameters: material selection (weight), size, and their impact on parasitic losses and damping performance. The choice might not be ultra critical but I'd like to optimize my selection since I have the ability to do so.
I was considering PN# 917278, 10% UD made of aluminum that has a 10% UD ac pulley on the back of it. Anyone running this guy?
Thanks for any input,
Chuck
Yeah. It's not an all-out race balancer. But it's a good street balancer. Most of the power comes from the weight reduction and actual harmonic dampening. The 10% UD is as much as I want to go with the accessories. I mean, it is a street car in my case, not a drag car.
Goodyear 4060775 Gatorback Poly-V Belt
Goodyear 4040390 Gatorback Poly-V Belt
And right now I'm chasing down a squeal with my stock balancer and stock belt. I want to get that solved before putting the ATI on there.
Goodyear 4040390 Gatorback Poly-V Belt
And right now I'm chasing down a squeal with my stock balancer and stock belt. I want to get that solved before putting the ATI on there.
Jake all over it, as usual. Thank you sir.
Do you think maybe your belt tensioner or pulley could be suspect? When I was tearing my motor down, I noticed that all of the bearings in my accessory pulleys were dry. It's possible to remove the bearing seal with a pick, flush them, and repack them with grease. Might be worth a shot if it ends up not being a belt.
Do you think maybe your belt tensioner or pulley could be suspect? When I was tearing my motor down, I noticed that all of the bearings in my accessory pulleys were dry. It's possible to remove the bearing seal with a pick, flush them, and repack them with grease. Might be worth a shot if it ends up not being a belt.
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I've replaced all those. I think it's my Power Bastards alternator. I'm going to have to drop the alternator out (PITA) and put the stock one back on and see if it fixes it. Maybe the pulley on there is bad and I can just reuse the stock one, because I'd love to keep a 220A alt on the beast...
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I assume there isn't one that's full aluminum with AC? Does steel vs aluminum hub make that much difference?
Also, it appears 917276 doesn't have underdrive for the AC like the y-body one does.
Also, it appears 917276 doesn't have underdrive for the AC like the y-body one does.
Last edited by spy2520; Apr 8, 2013 at 02:09 PM.
Im also looking for an ATI damper for my setup. Im using f-body accessories. My car will be for street/strip use. 2900 lb car with balanced rotating assembly and no forced induction. ATI recommended the 917242 pulley setup. I was also wonder on how big a difference people notice or see by going to the lighter pulley or the difference between the steel vs aluminum.
But for peak performance, the lighter weight damper with the aluminum pulley is the winner. Frees up engine hp, and is more responsive to changes in engine speed. Basically the same effect (though not as drastic) as a lightweight flywheel, but on the opposite side of the crank.
Forgive my ignorance, but is there a reason you couldn't use a y-body damper on an f-body? Are the belt spacings on the accessory drive different or something?
Last edited by ckpitt55; Apr 10, 2013 at 12:05 PM.
Originally Posted by ckpitt55
Forgive my ignorance, but is there a reason you couldn't use a y-body damper on an f-body? Are the belt spacings on the accessory drive different or something?
