SBC CHEVY PRO SPORT SFI 383 400 406 BALANCER DAMPER 6.61" INT. BALANCED # 34262

Description: PRO RACE BRAND SFI PERFORMANCE PRODUCTS DAMPER 6.61" FOR SBC CHEVY 383 400 406 ENGINES. INTERNALLY BALANCED (NOT WEIGHTED). PRO SPORT SFI SERIES Pro Sport Series, made by Pro Race Performance Products. S.F.I. internally balanced, (not weighted) The above picture is a file photo. Apearance may vary.6.61 INCH DIAMETER.Lifetime Warranty, Unlimited Mileage, Street or Strip Use.The PRO/SPORT ALL STEEL Harmonic Dampers are designed and manufactured for racing and high performance street applications and are available for a wide range of engines. The PRO/RACE Damper is a direct replacement for the cast iron stock damper which is no longer permitted by most racing sanctioning bodies due to the danger of fracture and high speed disintegration or separation of the inertia ring from the hub. This problem is eliminated with a PRO/SPORT Damper. The PRO/SPORT ALL STEEL Harmonic Damper is also a must for all belt driven supercharger applications due to the additional torque loads on the damper hub and keyway, which results in failure in nearly 100% of all blower installations with a stock damper. PRO/RACE company now offers specific models for supercharged small block (#74265), big block Chevy (#74267), and small block Ford (#74269) engines. These special dampers include dual keyways and the Chevy versions also feature six tapped holes to accept most blower pulleys.What is SFI Spec. 18.1? The SFI Foundation, Inc. (SFI) is a non-profit organization established to issue and administer industry standards for specialty performance automotive and racing equipment. The SFI Spec. 18.1 provides a set of minimum requirements for manufacturers to comply with when producing crankshaft vibration dampers. The standards were introduced to ensure safety on the track where certain racing classes require a SFI certified damper as specified by the sanctioning body. The SFI spec 18.1 stipulates minimum mechanical properties for the steel used in the construction of the damper, the requirement that the outer inertia ring is retained and where the damper is subjected to spin test requirements of 12,500 rpm for one hour. PRO/RACE and PRO/SPORT models conform to SFI Spec. 18.1. SPORT vs STREETALL STEEL Dampers. The PRO/RACE company offers three styles of dampers for small and big block Chevys; a Race and a Pro Sport model as well as a Street model. The difference is that on the Pro Sport and Race models, the elastomer is bonded to the steel hub and ring. This bonding is particularly valuable on applications where sustained high speed is present, such as in marine or circle track applications. The Street models are suitable for mild to moderate performance applications on engines making approximately 350 to 400 hp. The special splines (see cutaway photo) enhance the bonding between the elastomer and the inner hub and outer ring which helps prevent any outer ring radial movement, a common problem on OEM stock factory dampers. If you would like to use a Street style damper on a 400 small block, simply combine our #64262 Street small block damper with our #65266 Counterweight, and you will have the proper combination for that engine. Cutaway shows internal splines, which provide for twice the contact area, eliminating any possible movement of the outer ring. External diameter of the inner hub is splined, as is the inner diameter of the outer ring. Elastomer is vulcanized to the splined areas on Race units. This forms a very positive bond between the elastomer and the steel with twice the contact. Note splines on hub and ring.Extremely High Quality StandardsPro Race line of Dampers are manufactured to extremely high quality standards that are constantly monitored and checked at every step of the manufacturing process.Our quality levels in bore tolerance and the finish of the machined surfaces, in particular the critical oil seal area, far exceed OE standards and those of competitive models. Sixty degrees (60°) of computer generated timing marks (40° on Ford units) are accurately laser engraved. Pro Sport Harmonic Dampers also feature engraved timing marks at 0°, 90°, 180°, and 270° (except Ford models).Once assembly of the damper is complete, the entire damper is highly polished and then treated with a clear protective coating, providing an extremely attractive appearance. Our instruction sheets make installation a snap. Our Dampers are designed for a direct replacement of the stock damper, which means all your accessory pulleys still line up without modification. The dampers will accept most crank trigger wheels.Removable CounterweightsHarmonic dampers are supplied in two styles; for internally balanced engines and for externally balanced engines. Externally balanced engines have a counterweight bolted into the hub of the damper. The advantage of having a removable counterweight in the hub eliminates the possibility of having the counterweight mass move from its position.The Pro Race line of dampers for internally and externally balanced small block and big block Chevys engines as well as small block Chryslers is identical except for the counterweight. This means, for example, if you have a damper for a 400 small block Chevy you can remove the counterweight and the damper will work perfectly for a 350 Chevy. Conversely, if you have a 350 Damper and want to use it on a 400 you can now purchase the proper counterweight and bolt it into your 350 damper and it is now a 400 damper.WE RECOMMEND YOU REPLACE YOUR DAMPER BOLT EACH TIME IT IS REMOVED, DUE TO THE STRETCH FACTOR. RE-USED DAMPER BOLTS CAN COME LOOSE. NEW DAMPER BOLTS ARE ESSENTIAL, IN OUR OPINION. USED ONES CAN ALSO BE VERY UNSIGHTLY ON YOUR STREET RODS. Please see our other listings for additional accessories. Part number 34262 FOR SBC, ext. bal. 383's and stock gm 400's or 406's 350, When identifying your existing damper (balancer), look on the back side. This is not visible if the damper is mounted on the engine. If your damper has no offset in the casting or weight, then you have an internal (neutral) style damper. If you do see the offset in the casting or a weight, you have what is classified as an external damper, commonly used on all 400 SBC engines. Be sure of what you need before purchasing. You will definitely know if you have the wrong damper on the engine, as it will have a serious vibration. Remember, neutral dampers, have no weights or offset in the casting. They are perfectly balanced, hence the term neutral. We recommend replacing the mounting bolt and washer when installing a new damper. We have them listed in our other auctions. Part Number Balance Style Outside Diameter RPM Rating Weight lbs. 34262 INT. BAL., NOT WEIGHTED, SFI RATED 6.61" 12000 11 THE PRO/RACE LINE OF BALANCERS IS ONE OF THE BEST ON THE MARKET, AND IS USED EXCLUSIVELY ON ALL OUR IN HOUSE ENGINE BUILDS. Precision machined from steel much stronger than OEM stock Outer ring and hub are bonded together to prevent slippage Correct crank bore for proper fit to crankshaft High gloss steel finish with black timing marks plus marks at every 90° RPM Rating: to 12000 RPM It's a very wise investment when building an engine to replace the balancer (damper). This is an elastomer type balancer, much like the ones from the factory. The principal component to their operation is a bonded elastomer ring which adheres to the inertia ring and hub, and they are far superior in design to the OEM stock dampers. If you're considering using your old, possibly original damper, then you should know there is a great chance the elastomer band has dry rot and is not adhering as it should to the inner ring and outer hub. If this is the case, then damaging harmonics are not dampened as they should be. If your original damper is not functioning as it should, you will not notice it, as it has little to do with how much vibration is transferred into the vehicle. You simply can't base the condition of your damper on whether or not you can feel it in the car or not. It would be fair to say if your damper is more than 15 years old it is not functioning the way it should. One more good reason to replace the damper is the poorly visible timing marks on the OEM damper. This makes it nearly impossible to set your timing properly. One feature about the Pro Race line of dampers is the highly visible timing marks. We find this priceless when it comes to setting timing on an engine. Your view to the balancer is often limited in most cars, and being able to see the timing marks is a must. We have seen other dampers on the market for less money, and we have purchased them. We have found such dampers to be very low in quality and appearance, and the timing marks are hardly visible. These no name, low cost dampers could also break under high rpm if the metal is not properly cast. We also found the diameter of the center to be slightly undersized, requiring the need for broaching. Such dampers are being sold online from various performance car parts companies that appear to have no regard for the safety or function of the product. When you receive your damper, you will notice the high quality appearance. We carry most of the Pro Race line, and consider them a first rate product. A note from Skip White, president. We have seen others market a knockoff, no name damper that has to be the worst product on the market. We have nothing against knockoff products, but some are worth warning about. These low quality dampers being sold by many have a poor appearance and the center hole is often out of spec, with a dull finish. The casting was not machine finished; it was rough cast, as you would see on an engine block. What concerned us more than anything is knowing that the design of an elastomer style damper is very critical to how well the material is bonded between the inner and outer ring. This must be able to withstand the constant oscillation and heat for many years. The elastomer must be made of a material that won't dry out any time soon. One more very important aspect of this material is its Durometer rating. The Durometer rating, or resilience, is very important, as it should be in tune with the crank harmonics or it will not be able to do its job properly. Knowing how much pride the Pro Race company takes in everything they make, we are confident this factor has been addressed. When we're standing over an engine to set the timing, we usually have to rev the engine up to around 4000 rpm or more to make sure we get a total timing reading, as most distributors have very resistant springs in them. I would not want to think that I sold a damper that could develop a fracture or already have one in it, and know that this could break under high rpm, and whoever is standing above it would be at risk of death or serious injury. As we mentioned, stay away from the no name, or ultra low cost dampers. A final note: get rid of that tired old damper on your engine. The elastomer ring is more than dried out, and is most likely not dampening the damaging crank harmonics. This can lead to fractures in the crankshaft. It is claimed that dampers that are not doing their job can cost horsepower. This is most likely due to the fact that the crank harmonics are not being dampened, and create a drag in the engine. Harmonic Balancer, Crankshaft Harmonic Damper, Torsional Vibration Damper.The term so often used for this component is harmonic balancer, which suggests the unit balances the engine. In general, this statement is misleading. A better description for this component is a harmonic damper or torsional vibration damper. This better describes the actual function of the unit.Torsional vibration occurs in the crankshaft of engines, as a result of the combustion process, the sudden reversal of load on the piston, conrod and crankshaft during compression, followed by the ignition or firing of the compressed fuel and air in the combustion chamber. Subsequent relaxation of the load following combustion causes deflection or flexing of the crankshaft. This oscillating vibration which results from the reciprocating load changes will remain in force until dissipated by internal friction or damping. At certain rpm ranges these oscillations can come into phase with each other, creating potentially damaging torsional peaks in the crankshaft.Unless the amplitude of these torsional vibrations is controlled, major damage can occur to engine components, such as rapid wear of the timing sprockets, stretching or breakage of the timing chain, pitting or cupping of the camshaft and lifters, broken valve springs and valve train failure, reduced service life of crankshaft bearings. In extreme situations uncontrolled torsional vibrations can lead to a loose flywheel or a broken crankshaft with serious safety consequences.Why use a tuned elastomer (rubber) damper.Elastomer harmonic dampers have been used exclusively by Automotive OEMs for car engines, no matter what brand of vehicle, be it local or imported. The reason is simple, they have found that a tuned elastomer damper is able to reduce destroying crankshaft harmonics more effectively and over a wider range of RPMs than other styles of dampers. PRO/RACE, PRO/SPORT and PRO/STREET tuned elastomer dampers are also marketed as private label models by Ford Racing, Mopar Performance and others. These groups tested a number of aftermarket dampers including fluid or viscous style dampers prior to selecting PRO/RACE and PRO/SPORT tuned elastomer dampers which provide superior dampening for rapidly accelerating, high RPM engines. Very Important Note! Our sales staff has limited technical knowledge on this product and are usually unable to answer many of the questions asked. Many of the questions are, "how do you install this item", etc. We update the info in our listings on a regular basis, and if the answer to your question is not in the ad, then there's a good chance our sales staff does not know the answer. There is a solution to this for those with numerous questions about the product. We recommend searching the car forums for technical info. You will find the answers you need on the forums for certain. For those needing help on installing these, you can go to YouTube to find dozens of highly informative videos showing much of the info you need. 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.

Price: 229 USD

Location: Kingsport, Tennessee

End Time: 2024-08-28T18:25:25.000Z

Shipping Cost: 14.5 USD