Welcome to Vibration Damper page!
For nearly the last 50 years all diesel engines (including semis, agricultural, railroad, ships, etc.), except those on pick-up trucks, come with a viscous harmonic damper (to absorb the diesel spike / torsional harmonic vibration). Diesel spike damages crankshafts, clutch plates (auto and manual), flywheels (DMF style), and transmissions input shafts, gears and syncros, etc.
Now, diesel pick-up truck engine makers (Cummins and International, not Isuzu/Duramax yet) have finally realized that you need a viscous harmonic balancer to protect you expensive diesel engine! IT HAS TAKEN DODGE, FORD, and GM 25 YEARS to except the need to handle the torsional harmonic vibration problem with the proper solution that VibraTechTVD/Fluidampr developed long ago!
Here is the explanation of the problem, solutions, and the products you need:
The Problem
Diesel spike has been around for a long time. Your diesel engine generates torsional harmonic vibration (see below). The torque of a diesel engine puts more torque spike on a crankshaft and transmission than does a gasser. At low idle the diesel engine RPMs spike more (actually you just notice it better) than at higher RPMs. When the clutch is engaged (ditto for auto tranny) to the input shaft it transfers the spike thru the transmission input shaft to the syncros, gears, etc. When the clutch pedal is pushed in (auto tranny in neutral) the spike does not go into the transmission but stays within the engine. But eventually, the diesel spike will have impact on both the transmission components and the engine.
This is one reason Dodge, Ford, and GM have tried using a DMF (dual mass flywheel). The "purpose" of the DMF is to absorb the spike, reduce the noise, and protect the transmission and engine. The problem with the DMF is that there is just too much torque and constant spikes. The DMF does not last because it cannot absorb the huge, constant, torsional harmonic vibration. That is why they all fail. A poll on the www.dieselplace.com/forum , early in 2004, regarding DMF problems found that, 72% of responses in the first couple of months indicated DMF had significant problems. Quite a few owners had their DMF replace more than 7 times!
That is one reason why the aftermarket Single Mass Flywheel (SMF) clutch kits are made for diesel trucks Clutches. Although the SMF clutch kits do not fail as a result of the vibration, once the DMF is removed (or has failed) there is nothing that can help absorb the torsional harmonic vibration. The stock rubber damper has almost no positive impact on the torsional harmonic vibration once the engine and clutch kits are no longer stock. The extreme vibration will eventually have an impact on the engine and transmission.
It was much easier to recognize the torsional harmonic vibration problem on a manual transmission truck. It was also easier to review, test, modify, and verify both the problems and the Fluidampr corrections. While the auto transmissions do tend to absorb the noise of the diesel spike NOISE better than the manual transmissions, they still have the same torsional harmonic vibration running through their drive line! It makes their owners even less likely to notice, or understand, the problem and the impact, and the need to replace the oem "rubber" balance wheel on the front of the crankshaft!
Fluidampr has provided a solution to this problem and Dynadroit is pleased to be the distributor to diesel enthusiasts!
The Background
Diesel spike is an issue that has been worked by this company (www.fluidampr.com) and its sister company (www.vibratechtvd.com ) for more than half a century. The large Cummins, Caterpillar, Detroit Diesel, etc. have even larger vibration and rattling than do diesel pickups. Vibratech TVD provides similar solutions for large diesels as Fluidampr does for gassers and performance diesel trucks. The torsional harmonic vibration has been a well know issue for large diesel engines for a very long time but most diesel pickup truck owners are not aware that stock parts failures combined with diesel performance enhancement can increase the risk of engine and transmission damage.
The Fluidampr Explanation:
Crankshaft Deflection - The Invisible Enemy
Each time the air/fuel mixture inside a cylinder is ignited, the combustion that results creates a torque spike - an extremely rapid rise in cylinder pressure. This pressure, applied to the top of the piston, becomes the force that is applied to the crankshaft through the connecting rod. Each torque spike is like a hammer blow. In fact, it hits with sufficient intensity that it not only causes the crankshaft to turn, it actually deflects or twists it. This twisting action and the resulting rebound (as the crank arm snaps back in the opposite direction) is known as torsional harmonic vibration. If not adequately controlled, torsional vibration causes rapid main bearing and main journal wear and possible crankshaft breakage.
Keeping Vibration in Check
Fortunately, harmonic vibration can be controlled by a vibration damper - which is also called a harmonic damper or erroneously a "harmonic balancer". The main purpose of a "harmonic damper" is to control harmonic vibration, not necessarily to balance the engine's rotating assembly.
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Not All Dampers are Created Equal
Although harmonics occur over a broad range of engine speeds, rubber and elastomer-type dampers are frequency sensitive - they are tuned only to control harmonic vibrations that occur within a narrow band of rpm. However, there is more than one area within the operating range of a performance engine that critical harmonic vibrations occur, therefore, elastomer dampers may not be effective. The resulting lack of vibration control could prove to be very destructive. Rubber is also a poor dissipator of heat, and dampers by their nature create heat as they work to reduce vibration. As the rubber gets hotter, it does not work as well. Second, rubber breaks down when exposed to the elements. Over time, the rubber strip can crack and begin to deteriorate due to age and exposure. This can lead to inertia ring slippage, damper failure, and uncontrolled torsional vibration, which leads to costly parts breakage.
For more information on torsional vibration and the difference between Fluidampr and elastomer dampers, click here.
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| The Problem - Torsional Vibration |
Unchecked torsional vibrations can cause:
Crankshaft Cracking or Failure
Excessive Bearing Wear
Excessive Gear Wear or Failure
Broken Accessory Drives
Throwing or Slapping of Belts
Fluidampr Solution:
The Products:
Dynadroit provides these fine Fluidampr solutions for diesel pickup trucks:
Part No. |
Balance |
Application |
Material |
Finish |
Notes |
O.D. |
WT. (lbs.) |
Fluidampr Performance Diesel |
720211 |
External |
7.3 L PowerStroke |
Steel |
Black Zinc |
Ford Trucks 1999-2003 |
7-1/4” |
18 |
720221 |
External |
7.3 L PowerStroke |
Steel |
Black Zinc |
Ford Trucks 1994-2007 |
7-1/4” |
18 |
870201 |
External |
6.0 L PowerStroke |
Steel |
Black Zinc |
Ford Trucks |
8-7/8” |
20 |
870211 |
External |
6.0 L PowerStroke |
Steel |
Black Zinc |
Ford Trucks – Dual Alternator |
8-7/8” |
28.9 |
920301 |
Internal |
5.9 L Cummins |
Steel |
Black Zinc |
Dodge Trucks 2003 and up |
9-1/4” |
22.9 |
960301 |
Internal |
5.9 L Cummins |
Steel |
Black Zinc |
Dodge Trucks 1998 - 2002 |
9-3/4” |
23.8 |
960311 |
Internal |
5.9 L Cummins |
Steel |
Black Zinc |
Dodge Trucks 1992 – 2008 |
9-3/4” |
24.0 |
960341 |
Internal |
5.9 L Cummins |
Steel |
Black Zinc |
Dodge Trucks - Comp Series |
9-3/4” |
21.5 |
890101 |
External |
6.6 L Duramax |
Steel |
Black Zinc |
GM/Chevy Trucks 2001 – 2005 |
8-3/8” |
23 |
830111 |
External |
6.6L Duramax |
Steel |
Black Zinc |
GM/Chevy Trucks 2006 -2007.5 |
8-3/8” |
23 |
800191 |
External |
6.2L GM Diesel |
Steel |
Black Zinc |
GM/Chevy Trucks 1982 -1992 |
8.0” |
18.2 |
800141 |
External |
6.5L GM Diesel |
Steel |
Black Zinc |
GM/Chevy Trucks 1992 – 2000 |
8.0” |
18.2 |
Retail Price: P/N 720221 - $448.95 USD
P/N 870211 - $583.95 USD
P/N 960311 - $464.95 USD
All Others - $414.95
USD
Download installation instructions
Note: If you find someone selling for less than these prices, please let me know and I sell it to you a discount price!
Dynadroit Inc.
12650 W. 64th Ave. #E407
Arvada, CO 80004
720-262-6213
sales@dynadroit.com
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