ATI Superdamper
Jan 24, 2009, 09:59 PM
#16
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zero problems with fluidampr here, 10k on my built motor, 9200 with the fluidampr, obvious decrease in vibration in the car (big cams and no balance shafts) after install. I would buy it again in a heartbeat.
Jan 25, 2009, 11:17 AM
#18
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Installed the ATI on my race car and had to make 4 trips to Checkers to find the right serp belt to get it to fit. What a pain in the ***. That and I had to locktite the allen screws to the drive pully because they kept working their way loose.
Never noticed any difference either but V8 drag racers swear by them.
Switched to a fluidamper last spring and been running it ever since.
Never noticed any difference either but V8 drag racers swear by them.
Switched to a fluidamper last spring and been running it ever since.
Jan 25, 2009, 09:23 PM
#22
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i have the aluminum one which is 1 lb heavier than stock. i dont have the weight of the steel fluidampr to compare. i just used my factory one and the alum fluidampr one...
Jan 26, 2009, 05:31 AM
#26
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I have been manufacturing lightened pulleys for a few years and can’t say that the harmonic dampening is of much use. I’ve tested these on my dyno and at high rpm the lighter the pulley the easier it is on the engine. I also don’t believe in changing the ratio of these from OEM.
Best results always come from the lightest possible pulleys machined from a piece of billet aluminum.
Subaru’s need them a lot ore than Evos which already have a fairly light pulley. The scoob one is like a brick!
PS – Mike – the smaller the pulley the faster it spins on acillaries, the larger the slower but on the crank your correct - the larger the faster.
Best results always come from the lightest possible pulleys machined from a piece of billet aluminum.
Subaru’s need them a lot ore than Evos which already have a fairly light pulley. The scoob one is like a brick!
PS – Mike – the smaller the pulley the faster it spins on acillaries, the larger the slower but on the crank your correct - the larger the faster.
Last edited by popadel; Jan 26, 2009 at 08:27 PM.
Jan 26, 2009, 05:39 AM
#27
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I noticed there are a lot of users of after market dampers in this thread, so I thought of asking the question here.
Does this/would one of these really make a noticeable difference on my motor that I could feel:
9.7:1 CR
No Balance Shafts (Race Front Shaft)
Knife Edged Crank
S2 Cams & Full Built Head
Tilton Clutch (Lots Less Rotating Mass)
Entire rotating assembly spun balanced
My motor now because of all the rotating mass taken out vibrates pretty good at idle (Lumpiness from the cams). Once over 2500 RPM it smooths out quite a bit. (It was built for High RPM use)
I would be curious about one of these on my motor, to see if it made a difference that I could actually feel driving the car.
Does this/would one of these really make a noticeable difference on my motor that I could feel:
9.7:1 CR
No Balance Shafts (Race Front Shaft)
Knife Edged Crank
S2 Cams & Full Built Head
Tilton Clutch (Lots Less Rotating Mass)
Entire rotating assembly spun balanced
My motor now because of all the rotating mass taken out vibrates pretty good at idle (Lumpiness from the cams). Once over 2500 RPM it smooths out quite a bit. (It was built for High RPM use)
I would be curious about one of these on my motor, to see if it made a difference that I could actually feel driving the car.
Jan 26, 2009, 08:59 AM
#28
I have been manufacturing lightened pulleys for a few years and can’t say that the harmonic dampening is of much use. I’ve tested these on my dyno and at high rpm the lighter the pulley the easier it is on the engine. I also don’t believe in changing the ratio of these from OEM.
Best results always come from the lightest possible pulleys machined from a piece of billet aluminum.
Subaru’s need them a lot ore than Evos which already have a fairly light pulley. The scoob one is like a brick!
PS – Mike – the smaller the pulley the faster it spins, the larger the slower so an oversized pulley under drives the alternator and other ancillaries.
Best results always come from the lightest possible pulleys machined from a piece of billet aluminum.
Subaru’s need them a lot ore than Evos which already have a fairly light pulley. The scoob one is like a brick!
PS – Mike – the smaller the pulley the faster it spins, the larger the slower so an oversized pulley under drives the alternator and other ancillaries.
Mike
Jan 26, 2009, 09:40 AM
#29
If ati is press fit and not perfectly aligned this could cause belts to get thrown also.