Our fluid dampers are very similar in design to the type sold by Fluidampr. They have an internal ring surrounded by a thin film of high viscosity silicone fluid, which allows the ring to rotate freely within the housing on nylon positioning guides. This allows the outer shell to "spin up" faster then the ring as the engine accelerates, which increases horsepower by reducing the amount of weight the engine has to move by over 33% compared a standard elastomer type balancer. Also, the housing is a one piece laser welded design, so there is never any danger of the ring coming loose or timing marks slipping. These include printed timing marks to 50 degrees, and a symmetrical pulley bolt pattern. We have designed these dampers based on detailed factory specifications, to be sure there will be no problems with fit or finish. These are NOT the same as the imported garbage many other vendors are selling. These are AWESOME quality. Take a look at the picture and judge for yourself. The chrome is so highly polished, you can see the reflection of our ceiling in the damper if you look closely.
440 Source is an official SFI approved participating manufacturer. The SFI foundation performs destructive testing on sample fluid dampers to ensure that the steel and methods of construction used meets their stringent requirements. This means they spin the sample dampers up to 12,500 RPM for over an hour, then they literally rip the metal apart while measuring how much force it takes for it to bend, stretch and finally break. SFI's minimum specifications to certify a damper to pass their 18.1 testing includes a yield strength of 40,000 pounds, a tensile strength of 60,000 pounds, and a minimum 10 percent elongation. Our most recent testing was done on Feb 3rd, 2015. Our fluid dampers not only passed the testing, but far exceeded SFI's minimum specs. Our yield strength was 57,640 pounds (over 40% stronger than required). Our tensile strength was 75,640 pounds (over 25% stronger than required) and our elongation was 28.5% (that's 285% of, or almost three times the required minimum!) Not only do you get this kind of GUARANTEED quality, but you get it at a fraction of the cost of the name brand units. These dampers are for internal (neutral) balance engines only, they will not work for factory cast crank (externally) balanced engines.