“Increasing torque causes the stock tuned elastomer damper to work harder.
WHAT IS A HARMONIC BALANCER UPGRADE
LeBarron says that an engine builder should consider an upgrade to an aftermarket damper/balancer whenever the engine is modified beyond stock. And, because you’re doing that, you’re combining different motions, and then you’re putting an explosion in the middle to make all this turnaround.” This 427 cid twin-turbo LS engine built by Borowski Race Engines uses an ATI damper to temper the more than 1,500 horsepower on tap. Everything inside the engine causes it to move around because you’re taking rotating mass and reciprocating mass and joining them together to go out to the rear wheels. “In other words, if you bolted your engine directly to your chassis, you know, your radio would have funny tunes. “A dampener is like a rubber motor mount,” says Tom Lieb, founder and CEO of Scat Enterprises. “The harmonic balancer (damper) controls the twist to achieve durability and efficiency,” says LeBarron, who notes that not all dampers are constructed or function the same. The third type of vibration is Torsional, which is the end-to-end twisting and rebounding of the crankshaft caused by combustion. The main bearing support plate and thrust bearings are in place to prevent this movement. “Balancing the engine by precision matching the pistons, connecting rods and crankshaft counterweights will minimize an unbalanced vibration.”Īxial vibration is a type of vibration that involves the forward and backward movement of the crankshaft. In regard to an engine, LeBarron says even distribution of the rotating assembly weight prevents this. “It is a weight imbalance vibration that occurs once per revolution that feels like the constant thumping when you lose a wheel weight.” This 421 cid SB Chevy nitrous engine from BMS Racing Engines uses an ATI damper. Unbalanced vibration is what comes to mind first, according to Brian LeBarron of Vibratech TVD and Fluidampr. And each type of vibration has a different way of controlling it. There are three types of engine vibration that engine builders try to minimize.
Although harmonic balancers are not musical instruments, they do control resonance inside the engine, which is music in some circles.
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