ATI Damper benefit?
10-31-2015, 09:33 PM
#1
ATI Damper benefit? I see lots of builds with aftermarket dampers on the engine. I'm curious, what benefits could I expect to see if I purchased a stock sized ATI damper for my LS1? It is a mass reduction and thus similar to a light flywheel?
I'm tempted to buy one because "its pretty" and "everyone else has one" but in my mind that's kind of not a good use of money, so trying to figure out "why does everyone seem to have one" ?
I'm tempted to buy one because "its pretty" and "everyone else has one" but in my mind that's kind of not a good use of money, so trying to figure out "why does everyone seem to have one" ?
10-31-2015, 09:59 PM
#3
Moderator
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,446
Received 1,838 Likes
on
1,146 Posts
I found the ATI did a better job damping vibrations than the stock damper
11-01-2015, 12:15 AM
#4
Can you quantify how you can tell that? I read that in their marketing speak but dont fully realize what that might mean short of "well it sounds better for the internals and everything else, but Ive no idea how Id know if its true or not"
11-01-2015, 09:29 AM
#7
The balancer absorbs harmonic vibrations reducing stresses just about everywhere in the engine. On the low end there is little benefit but the higher the RPM the more beneficial it becomes.
Innovators West makes a great piece as well. I've had both and would use either one.
Still bugs me that CCW stopped making their wheels with the much better coatings like the ones in your pic. I've got the SP500's and I'm thinking about stripping them and going polished.
Innovators West makes a great piece as well. I've had both and would use either one.
Still bugs me that CCW stopped making their wheels with the much better coatings like the ones in your pic. I've got the SP500's and I'm thinking about stripping them and going polished.
Trending Topics
11-01-2015, 09:52 AM
#8
TECH Senior Member
ATI Damper benefit? The ATI superdamper tunes the crankshaft's torsional resonant frequency to well past 7500 rpm.
The stock damper tunes it to barely past 5000 rpm.
The stock damper also is prone to come apart with repeated high rpm usage.
The ATI damper cannot come apart unless you unbolt its screws.
The stock damper tunes it to barely past 5000 rpm.
The stock damper also is prone to come apart with repeated high rpm usage.
The ATI damper cannot come apart unless you unbolt its screws.
11-01-2015, 09:57 AM
#9
Moderator
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,446
Received 1,838 Likes
on
1,146 Posts
This is the best I can do. I had the wrong ATI damper when I first built, so I had to use the stock damper. Then I got the right ATI damper and installed it. I noticed fewer vibrations in the cabin and I heard less metallic rattle noises on cold start. So it's a pretty direct comparison before and after. At higher RPM, definitely smoother spinning
11-01-2015, 12:16 PM
#10
The balancer absorbs harmonic vibrations reducing stresses just about everywhere in the engine. On the low end there is little benefit but the higher the RPM the more beneficial it becomes.
Innovators West makes a great piece as well. I've had both and would use either one.
Still bugs me that CCW stopped making their wheels with the much better coatings like the ones in your pic. I've got the SP500's and I'm thinking about stripping them and going polished.
Innovators West makes a great piece as well. I've had both and would use either one.
Still bugs me that CCW stopped making their wheels with the much better coatings like the ones in your pic. I've got the SP500's and I'm thinking about stripping them and going polished.
The ATI superdamper tunes the crankshaft's torsional resonant frequency to well past 7500 rpm.
The stock damper tunes it to barely past 5000 rpm.
The stock damper also is prone to come apart with repeated high rpm usage.
The ATI damper cannot come apart unless you unbolt its screws.
The stock damper tunes it to barely past 5000 rpm.
The stock damper also is prone to come apart with repeated high rpm usage.
The ATI damper cannot come apart unless you unbolt its screws.
This is the best I can do. I had the wrong ATI damper when I first built, so I had to use the stock damper. Then I got the right ATI damper and installed it. I noticed fewer vibrations in the cabin and I heard less metallic rattle noises on cold start. So it's a pretty direct comparison before and after. At higher RPM, definitely smoother spinning
I can tell you from tearing apart roundy round engines every winter that the fellas who purchase quality harmonic balancers will have bearings that look new and are often re usable for another season or two.
Higher order harmonics from elevated rpms are really kept in check and the torsional distortion that a crankshaft casting/forging sees is dramatically reduced.
11-02-2015, 06:38 PM
#15
11-02-2015, 08:52 PM
#17
TECH Senior Member
ATI Damper benefit?
...
From 3,112 to approximately 6,500 rpm, all of the dampers limited crankshaft twist to no more than 0.6 degrees. Above 6,500 rpm, things got interesting. Crankshaft twist increased by a considerable margin with three of the dampers. At 7,893 rpm, one damper allowed a considerable 2.0 degrees of crank twist. The second had 1.7 degrees of twist, and the third had approximately 1.25 degrees of twist. The last damper—made by ATI—allowed just 0.28 degrees of crankshaft twist.
...
From 3,112 to approximately 6,500 rpm, all of the dampers limited crankshaft twist to no more than 0.6 degrees. Above 6,500 rpm, things got interesting. Crankshaft twist increased by a considerable margin with three of the dampers. At 7,893 rpm, one damper allowed a considerable 2.0 degrees of crank twist. The second had 1.7 degrees of twist, and the third had approximately 1.25 degrees of twist. The last damper—made by ATI—allowed just 0.28 degrees of crankshaft twist.
...