The patented ATI Super Damper standard harmonic balancers are designed exclusively for high performance engines. Inner and outer shells are available in aluminum or steel, and contain a steel inertia weight.

The inertia weights have six (2-ring design) or eight (3-ring design) computer-machined grooves to retain the proper durometer O-rings (dyno tested for each application). Whether you race or just drive on the street, ATI harmonic balancers are the perfect choice.

Features include:

•        Eliminates torsional crankshaft vibrations
•        Exceeds SFI 18.1 specs
•        Black zinc chromate finished
•        OEM equipment on a variety of crate engines
•        Tunable, re-buildable, and extremely efficient at all rpm
•        Laser-engraved 360° timing marks

DYNO RESULTS SHOWING DAMPER FAILURES.

All engines shown below were pump gas street rod engines, sbc and bbc.

In the dyno report below, you are seeing our first test of what we assume is a normal functioning damper, then replaced it with an ATI Super damper. The dyno reports listed further down are what led us to this test. The reports below demonstrate why it is worth spending a bit more money on the damper for your high performance engine. Lower cost dampers are not designed to operate in these high RPM applications and will have trouble dampening the harmonics throughout the RPM range. These harmonics in this rpm range are very damaging to the crank, bearings, timing chain, and valve train. If a damper goes into an all out failure as shown in the dyno graphs further down, then rest assured, the result will be serious damage in your engine sooner rather than later.

The dyno graph below shows us something very interesting. What you are seeing is a damper that is failing after the first run. This shows us one very important fact. Just because a damper passed the first or all of the dyno runs does not mean it's going to stay that way for very long. 

As shown in the graph above, the failure may show up as a minor failure but the graph below shows that once there is any hint of failure, it will usually progress somewhat quickly. Strange how they rebound in the graph shown on these reports. Note that even with the lower cost damper, the engine recovers once it passes through the region where the most damaging harmonics occur. However, do understand that the power loss shown will be the least of your problems if you continue running with a damper that is not doing its job throughout the complete rpm range. 

Engine component failure will be the result. It could be that we're asking too much of the low cost line of dampers. Lower cost dampers are more suitable for lower hp engines that have shorter stroke cranks, and max out in the lower rpm ranges. All of the dyno sheets in this ad had the mid-range performance dampers on them. All of these are from engines ranging from our 427, 434 and our bbc 572 engines. Those engines going forward will all be equipped with the ATI Super Damper. We have not seen such failures in the past, but that does not mean the engines were operating at their best.

The reports below are showing outright failure of the damper. The massive drop in power was most likely caused from spark scatter in the distributor, due to excessive harmonics transferred up the line from the crankshaft. Some of the power loss would have also come from the actual harmonics not being dampened properly, and some could have came from harmonics passed into the cam/valve train.

The graph below shows the worst failure of all. This problem would have been very difficult to pinpoint if it occurred with the engine in your car. This would for sure cause damage to your engine before long.

Another failure on one of our 434 SBC engines. The nasty dip shown would lead to serious problems had this engine been allowed to continue running like this. The failures you are seeing in these graphs have occurred in a somewhat short time. It is obvious to us that it is a somewhat batch related issue, and these were all on pump gas street rod engines. As mentioned above, we're simply demanding too much from the low cost dampers. It would not take much of a flaw in the manufacturing of these lower cost dampers to produce problems. The solution is simple: spend a little more money on your engine and purchase a high performance damper. 

We are not responsible for collateral damage caused by the use of this product.

RETURN POLICY Should a problem occur, please contact us. If a return is necessary, please contact us for an RGA number and return authorization. The RGA number must be included on the return label. If an item is returned without an RGA number, it will not be processed. A full description of what the problem is needs to be included with any returned product with your contact info, and proof of purchase. Even though you may have explained the problem to us, and been granted permission to return the product, we must have a written explanation and a contact number included with the product. It is also recommended that you include the name of the person from our company that you have been in contact with. You must send the item back to us in a trackable manner (USPS Priority Mail, FedEx, etc.) and keep the tracking info of the returned product. Please give ample time for returns to be processed. Following these guidelines will make the return process work as it should.   PAYMENT AND SHIPPING DETAILS.   We offer great discounts on shipping. You only pay the full shipping fee on the highest shipping cost of your items, and HALF PRICE shipping on all additional items. Few offer discounts on shipping such as this. Our checkout system will automatically calculate your shipping discount at the time of final payment, providing you consolidate your payment. You may receive a verification and tracking number shortly after purchase, but this does not necessarily mean that your product has shipped. It would be fair to say that 98% of products will be going out the day the shipping label is issued. On occasion, the product may not ship out until the next day after the label has been issued. Most products purchased late in the day will not be shipped until the next day.     If you checkout and start over, the auto calculator will not recognize the multiple purchases, and there will be no shipping discount.    FedEx is our primary shipper. We are unable to ship to APO/FPO addresses. Help us ship your order promptly by including your physical address at checkout. If your order MUST be shipped to a PO BOX, please contact us. Additional charges may apply. Below is a map representing the estimated delivery time to get to you from our location. Delivery times may vary, especially during peak periods. FedEx Home Delivery delivers Tuesday - Saturday. If a package leaves here on a Thursday, and you are in a 2 day delivery zone, your package may deliver to you on Saturday. If you are in a 3 day zone, and your package leaves on a Thursday, you should receive it on the following Tuesday. Expedited shipping is available upon request for an additional fee. Please contact us for rates. The estimated shipping time is usually as the map shows, but many factors can delay this.   Hawaii and Alaska have a 6+ day estimated delivery time. The shipping quoted in this ad is only for the 48 continental United States. If shipping to anywhere else, please contact us. The half price shipping on all additional items also only applies to items that are being shipped in the 48 continental United States.