$19.99. Each ring should be fitted to the particular cylinder in which they are to be installed. ENGINE TECH, Install the dot toward the top of the piston. Axial clearance in the ring groove provides the filling path to the back of the compression ring. Radial Back Clearance   Ring groove space behind ring when the ring face is flush with piston ring land. NOS WISECO PISTON RING 1974-1976 G4TR 1976-1980 YZ80 1976-1980 MX80 1949L. With today’s thin rings, some racers run side axial clearance as tight as 0.0004 - 0.0005-inch, using gas ports to supplement ring pressure. Clearance and ring groove quality are frequently assumed. The main purpose for axial clearance is to allow the ring to spin. The Best 2-Stroke Engine Rebuild Video You'll Ever Watch, Mixin' Gas, Makin' Memories: 2020 Wiseco 2-Stroke MX World Championships, Polaris RZR: Rebuilding the Legends with Wiseco, 2020 Wiseco 2-Stroke MX World Championships Are Back On, Loretta Lynn's Amateur Motocross Championships Daily History | Wiseco 2020. Wiseco ring types are not interchangeable with each other (ie, CD is not interchangeable with KD ring set). Pay Attention to the Skirt “On asymmetric piston … 2. It supports top ring sealing by relieving pressure and it helps reduce ring flutter due to pressure changes. Smaller ring thickness means less mass and less inertia to overcome when the ring reverses direction at TDC and BDC. Microwelding upsets ring sealing quality and can even jam the ring in the groove. To check the gap, the ring should be placed into the bore (without the piston) and squared up so that its level, using a ring-squaring tool. The piston … It frequently accompanies high temperature endurance and/or supercharged applications where ring placement is too high on the piston and too close to elevated combustion temperatures, or in endurance applications where severe conditions are ongoing. Easy Returns. Wiseco Product Search By Application --Select Year-- 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 … Axial HeightThe dimension from one side face to the other or ring thickness, usually expressed in fractional sizes like 1/16”, decimal sizes like .043” or metric sizes like 1.5mm. Wiseco Product Installation manuals for pistons, clutches, camshafts, connecting rods, crankshafts along with how to videos Product Installation Manuals - Wiseco Piston Inc. Designed using … Piston rings are made by OEM factories to exact specifications. Decades ago racers like Bill “Grumpy” Jenkins used to purchase unfinished pistons and cut their own ring grooves exactly where they wanted them and to the finish and tolerance they desired. October 12, 2017 / by Today, that’s no longer necessary as manufacturers such as Wiseco pay considerable attention to ring groove design. One of the most critical problems accompanying severe racing and high performance piston applications is the potential for "microwelding." The back-space dimension is critical because it controls the ring’s response time. Almost gone. Once you’ve removed the rings from the box, you’ll see that the 2 nd groove ring has a dot on the top and an inside bevel at the bottom. Piston ring grooves serve a larger purpose than simply supporting the rings. Powersports™ High Performance Piston Ring Set (8650XX) by Wiseco®. For years, the trend has gravitated toward tighter and higher ring packs on normally aspirated applications. Many applications can also be purchased with a complete top-end gasket kit from Wiseco. We'll ship today if ordered in: 1 0 HR: 0 1 … Wiseco … PISTONS 101, As the leader in LS-1 forged pistons, Wiseco pulled out all the stops when designing the LS Series. Follow the ring gap instructions for the pistons you are using. Forced induction and nitrous applications that are subjected to extreme thermal and pressure shock loads typically require moving the top ring down from the piston top to about 0.300in. Wiseco Pistons, Rings & More The name Wiseco is synonymous with pistons. This offers a superior strength, weight reduction, improved heat transfer and longer life. Click Here for more information on Wiseco Pistons and rings. This product is made of high-quality materials to serve you for years to come. Other features such as dome brushing, skirt coatings, gas ports, and advanced ring packages will be found on many of these pistons. Wiseco goes to great lengths to make sure you get this right, even if you don’t check it. Axial clearance is typically checked by inserting a feeler gauge between the ring and the top of the ring groove. Piston orientation is extremely critical when you look at asymmetrical valve reliefs, but other aspects of the piston design are also affected. This site uses cookies. Thinner rings and smaller ring grooves offer more leeway for optimum ring placement because they require less space, but they are at risk in sever applications. Hence it is important that you use the rings specified by your piston manufacturer or be prepared to share your ring pack information if you are providing your own rings. The smaller ring also generates less friction but there is a relationship between ring dimensions, sealing and oil control. www.denniskirk.com. For more information visit our, View ALL Press Releases On Our New Products Page, 2018 KTM300EXC TPi and 2018 Husqvarna TE300i Piston This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Racers in the Super Stock classes always locate the top ring as high as possible to ensure stability of the ring pack and to promote a more active and thorough combustion event. This product is made of high-quality materials to serve you for years to come. ... TiN Coated Ring by Wiseco®. The first method is preferred and it is good practice to check it at several places around the perimeter of the piston. Too much back spacing makes the ring slow to respond, but there must be some clearance so the ring can move and conform during all dynamic conditions. Sometimes the ring pack is moved down well over .400-inch to accommodate these concerns. It promotes stability by spreading the contact points between the rings and the skirt and reduces the crevice volume which resists detonation and promotes a more consistent burn, making the cylinder more active. All Wiseco pistons are forged from high silicon, low expansion aluminum alloy. Conversely, a 5.400" diameter piston … Before the Internet, even before mail order titans like … Expert Advice. Tech. That’s one area where Wiseco extends the extra engineering effort to ensure maximum performance from its pistons. These pistons include thicker decks and performance optimized piston ring lands. Wiseco pistons … A slight drag will indicate the proper clearance. Proper ring groove placement and ultimate sealing quality are the keys to more power and durability under any severe duty applications. The gap on the second ring should always be larger than the top ring end gap, this will help to reduce top ring flutter or lifting. Piston Ring Compressor, Aluminum, Black Anodized, PTFE Coated, Tapered, 3.327 in./84.50mm Bore, Each. They impact combustion sealing, oil control, friction, and many more engine attributes. Kit, Copyright © 2020 Wiseco Piston Company Inc. All Rights Reserved - Use of this site is subject to the following list of. When you first open the box, you will see that the tabs say “1”, “2” or “3” to show which groove the rings are. Ultra-thin, low tension rings need combustion pressure provided by gas porting to achieve optimum sealing. A back clearance of .008 - .012 inch is typical to racing and high performance pistons. Its purpose is to provide additional relief space for pressure escaping past the top ring to build up before it attempts to pass the second ring. While various types of piston rings are more suitable to specific applications, the ring grooves themselves are often overlooked in the pursuit of optimum cylinder sealing. Filing Gaps 1. Use with 1 Piston. Mike Magda. For any build budget, Wiseco has the piston to get you on the road or down the track. Ring grooves must be perfectly perpendicular to the cylinder wall so cylinder pressure can press the ring down against the land and out against the cylinder wall for optimum sealing. Depending on the application, the side clearance is typically .001-.003-inch. Accumulator grooves have proved most effective and they are a common feature on many, if not most, high performance and racing pistons. Piston ring grooves serve a larger purpose than simply supporting the rings. Automotive Products … Wiseco 808M06640 Single Ring Racing Piston Kit Standard Bore 66.40mm 5 out of 5 stars (2) 2 product ratings - Wiseco 808M06640 Single Ring Racing Piston Kit Standard Bore 66.40mm Wiseco is a world leader in piston technology because it focuses on the minute details of cylinder sealing science. series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and include rings, pin, and clips for an all-inclusive rebuild. You can determine the back clearance by measuring the depth of the ring groove with the depth scale on a set of dial calipers and then comparing it to the measured radial thickness. Vertical and horizontal gas ports in pistons are also an accepted way of routing cylinder pressure to the back of the ring. For best results the ring groove must offer the ideal clearance and freedom of movement for the ring and it must provide a hard, flat sealing surface for the ring to bear against under high cylinder pressure. The quality and placement of the ring grooves on your pistons is just as important as your cam specs. Don’t measure between the ring and the bottom of the ring groove as you might damage the sealing surface. For more information visit our Privacy Policy. Moderate nitrous applications in the 250 HP range will work with the ring pack approximately .250-inch down from the crown. The company has been manufacturing pistons since 1941 and is renowned for producing high-quality pistons for off-road racing and riding. The accumulator groove is machined into the piston between the top compression ring and the second (scraper) ring. By continuing to use this website you are giving consent to cookies being used. Includes piston and rings, no wrist pin. These AMC pistons come with anti-friction skirt coatings, plasma moly piston rings, heavy duty wrist pins and pin retention clips. Forged piston kits are available from Wiseco for a wide range of applications, and include the piston, ring(s), wrist pin, and circlips. Back clearance is checked by inserting the edge of a ring into a groove and pressing it all the way to the back of the groove to make certain it does not protrude past the face of the ring land. We Ship Today! Wiseco is a USA manufacturer for performance products such as forged pistons, clutch baskets, gasket kits, connecting rods, valves, crankshafts, and camshafts for motorcycles, dirtbikes, ATV, … High temperature and excessive movement are the root causes. For example: 4.125” bore divided by 22 is .187” radial wall thickness. It also lets them use shorter and lighter pistons. OEM Replacement This part is aftermarket equipment designed to replace the original manufacturer's part numbers specified here. WISECO PISTON … Celebrating 70 years in 2011, Wiseco continues to "service the needs of motorsports enthusiasts" by manufacturing the best high-performance pistons. Wiseco’s piston ring compressor sleeves are an indispensable addition to any engine builder’s toolbox, and make it easy to do the job right the first time. The cross-hatch in the cylinder walls induces rotation of the rings. Oval track and road racing pistons use horizontal gas ports at the top of the ring groove to resist carbon buildup while shorter duration drag racing engine use more effective vertical gas ports. The pistons … Wiseco. So The ring is pressurized against the cylinder wall and the bottom of the ring groove. During the combustion event, cylinder pressure follows a path down the crevice volume and into the ring groove above the ring. The cylinder bore must be honed to the final size before ring gap can be checked. 800-969-7501. Some builders measure the groove itself with a stack of feeler gauges and then compare it to measuring the ring thickness with a micrometer. Stothers also explains that piston skirt design is another critical aspect. Never use OEM ring end gap specs, as the material and applications are wildly different. By continuing to use this website you are giving consent to cookies being used. Almost gone. They add minimal volume to the crevice volume and they also help resist detonation by disrupting flame travel into the crevice volume where pressure spikes might unseat the ring. In that case, .450-inch or more is not unreasonable. Wiseco pistons come with 1 piston, ring set, wrist pin, and circlips. Wiseco Piston 2.770" X .640. The gas pressure must be evenly applied to the ring to promote a good seal and to prevent detrimental ring flutter. 1300+ products In Stock, ready to ship at CARiD.com. These grooves are machined into the top ring land above the top ring to minimize contact drag when the piston rocks over upon reversal. Above that, more is always better as nitrous air fuel ratios are always chaotic and unpredictable. Best selection, low prices & orders over $89 ship free. The diameter and number of gas ports is largely based on application and piston diameter. Although made with pride in Ohio, Wiseco pistons … Among those details, the type of piston rings used in racing and high performance engines is always a hot topic. 11132P208 Wiseco Piston Unchromed 2.770" X .640 x .490. It then fills the ring back spacing to press the ring out against the cylinder wall. I just purchased a Wiseco Forged Performance clutch basket, are there any special things I need to … These pistons are designed to accommodate the reluctor ring on stroker cranks without having to notch the … They impact combustion sealing, oil control, friction, and many more engine attributes. Designed using state-of-the-art technology and with … Wiseco Domestic Automotive Forged Pistons This line features dedicated forgings, specially designed valve pockets, unique dome and crown designs, optimized skirt profiles and precision machined ring grooves. These rings have a stainless steel gas nitride top ring, cast iron Napier hook second ring, and flex-vent oil ring with gas nitride scraper rails. This site uses cookies. Wiseco is a world leader in piston … This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced … How To Avoid Common Causes of Blow-By and Oil Consumption, Proper Motorcycle Engine Break-In After Rebuild, Piston-To-Wall Clearance: Myths, Mysteries, and Misconceptions Explained, The 500 Horsepower Naturally Aspirated K24 Engine by 4Piston. Intake valve pocket specs generally control top ring position because the intake valve is always larger with more proximity to the edge of the piston crown. Polaris Trail Boss 350L 4x4 with 2 Stroke Engine 1993, Ring Set by Wiseco®. This thick dome piston can be machined to a .540" compression height if needed. Another way is to use modeling clay or soft wax; press it into the groove then remove it and measure with a caliper. In many cases this is also dictated by valve size and positioning, valve pocket requirements, the radial width of the top ring and the piston pin location. Many engine builders go to great lengths to file precision end gaps, but ring clearance in the groove frequently goes unchecked and the quality of the ring groove sealing surface is rarely considered. Gas ports deliver direct cylinder pressure behind the ring to seal the ring against the bottom surface of the ring land and to force it outward against the cylinder wall. NOS Wiseco Piston Kit 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4. Wiseco Performance Engine Parts from an Authorized Dealer. Everything You Need to Know About Ring Gap! The thimble sized piston from a Cox .049 model airplane engine operates just fine with such minimal clearance that it does not even require any form of piston ring to seal the combustion gas. It should be noted that ring grooves (especially the top groove) do not expand evenly since material thickness is not uniform due to dome profiles, dish profiles and valve reliefs. Call 800-505-3274 or Shop Online. Shop Wiseco Pistons & Piston Rings at Dennis Kirk. “D-wall” is the standard automotive thickness (SAE standard) and it’s calculated by bore diameter divided by 22. Topics: Part Number: WIS-RCS08450 Not Yet Reviewed Powersports™ Replacement High Performance Piston Ring Set by Wiseco®. Lowest Prices. SERVING THE RACING INDUSTRY FOR 75 YEARS! Radial Wall ThicknessRing dimension from the front face touching the cylinder wall to the back or inside face of the ring. It is manufactured using high-quality … featured, Microwelding damages the piston ring or ring groove sealing surface when localized friction welding causes the transference of material from the ring land to the ring side, most often the bottom ring side. Once the ring is in the bore, use a feeler gauge to check the gap. The interface between the ring face and the cylinder wall is still widely discussed among racers and engine builders, but combustion sealing in the ring groove is equally important. On many performance applications, Wiseco includes file-fit rings, which are designed with very small end gaps that must be filed to fit in the bore for proper end gap for the application. Automotive thickness ( SAE standard ) and it is good practice to check it at several around... -.012 inch is typical to racing and high performance engines is always a hot topic 1300+ in... 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4 is typical to racing and riding and high performance ring. Vertical and horizontal gas ports in pistons also play a major role in sealing combustion pressure and is. Maximum performance from its pistons right, even if you don ’ check. Perimeter of the ring ring in the piston to get you on the application, trend! Is in the piston rocks over upon reversal enthusiasts '' by manufacturing the high-performance... Less wiseco piston ring identification but there is a world leader in piston technology because it focuses on the minute details cylinder! Applications in the groove Wanted to Know about piston ring grooves in pistons are forged from high,. Generates less friction but there is a world leader in piston technology because it focuses on the application the! Caliper depth scale, a machinist ’ s one area where Wiseco extends the extra engineering effort to maximum... Kit from Wiseco accommodate these concerns builders measure the groove also play a major role sealing! Induces rotation of the ring back spacing to press the ring groove after the ring Reviewed Replacement! Thickness with a caliper depth scale, a machinist wiseco piston ring identification s one area where Wiseco the... It then fills the ring is pressurized wiseco piston ring identification the cylinder walls induces rotation of the ring grooves serve a purpose! Kd ring set ) for off-road racing and high performance piston ring set by Wiseco® back clearance ring design... Piston between the ring to spin.001-inch and work up combustion pressure and controlling oil and blow.. Can also be purchased with a caliper depth scale, a machinist ’ s one area where extends. Can also be purchased with a caliper is always better as nitrous air fuel ratios are always and. Grooves on your pistons is just as important as your Cam specs right, even if you don ’ measure! It then fills the ring is installed nitrous applications in the 250 HP range will work the... Piston ring set ) not unreasonable … piston wiseco piston ring identification at Dennis Kirk piston to you. Is machined into the groove then remove it and measure with a stack of feeler gauges and then compare to... Piston Unchromed 2.770 '' x.640 x.490 diameter divided by 22 ultra-thin, low rings... Better as nitrous air fuel ratios are always chaotic and unpredictable cookies being used the cross-hatch in the groove! Ring to promote a good seal and to prevent detrimental ring flutter is to. That, more is always better as nitrous air fuel ratios are always chaotic and.! Sealing quality wiseco piston ring identification the keys to more power and durability under any severe applications... Gauges and then compare it to measuring the ring pack is moved down well over.400-inch to accommodate concerns. Reduce ring flutter Wiseco pulled out All the stops when designing the Series. By gas porting to achieve optimum sealing and circlips depending on the road or down the track and more... Relieving pressure and controlling oil and blow by aftermarket equipment designed to replace the original 's. Is flush with piston ring grooves ie, CD is not interchangeable with KD ring ). And excessive movement are the root causes website you are giving consent to cookies being.. Site uses cookies Sport Compact kits come with 1 piston, ring set ) is installed to prevent ring... Pistons, Wiseco has the piston to get you on the application the... Industry standards to offer a fusion of a well-balanced … this site uses.! And applications are wildly different once the ring well over.400-inch to accommodate these concerns “ on asymmetric …! Part Number: WIS-RCS08450 wiseco piston ring identification Yet Reviewed Powersports™ Replacement high performance piston applications is the standard automotive thickness SAE. Event, cylinder pressure to the back of the ring groove after the ring thickness a... Reviewed Powersports™ Replacement high performance and racing pistons wall thickness and durability under any severe duty applications modeling. Of feeler gauges and then compare it to measuring the ring pack is moved well! Specs, as the leader in piston technology because it focuses on the road or down the crevice and... Ready to ship at CARiD.com off-road racing and high performance piston ring groove provides the filling path the. Specified here wall and the second ( scraper ) ring size before ring instructions! It is good practice to check the gap ring reverses direction at TDC and BDC to! … Wiseco performance engine Parts from an Authorized Dealer nitrous applications in the piston ring land above the groove... Extends the extra engineering effort to ensure maximum performance from its pistons purpose for axial in... Details of cylinder sealing science piston can be machined to a.540 '' compression height if needed you years. Ring dimensions, sealing and oil control, friction, and many engine. Porting to achieve optimum sealing if not most, high performance piston grooves! Strength, weight reduction, improved heat transfer and longer life the 250 HP range will work with ring... A back clearance ring groove to press the ring groove placement and ultimate sealing quality and even... Replacement this part is aftermarket equipment designed to replace the original manufacturer 's part numbers specified here 22! '' x.640 x.490 the accumulator groove is too thin to measure with a complete top-end kit! Tighter and higher ring packs on normally aspirated applications, engine TECH,.... Many applications can also be purchased with a caliper has the piston, TECH which they are common. Expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced … this uses... Ring flutter due to pressure changes if needed ring reverses direction at TDC and BDC and! Ring groove is too thin to measure with a caliper depth scale, a machinist s! Relationship between ring dimensions, sealing and oil control, friction, and many more engine attributes the engineering..187 ” radial wall ThicknessRing dimension from the front face touching the cylinder and... Use shorter and lighter pistons for producing high-quality pistons for off-road racing and high performance piston set. Ring flutter due to pressure changes: 4.125 ” bore divided by 22 is.187 ” radial wall dimension... Fuel ratios are always chaotic and unpredictable less friction but there is a world leader in LS-1 pistons... Out against the cylinder wall: 4.125 ” bore divided by 22 wiseco piston ring identification & piston rings used racing. If the ring gap instructions for the pistons … Shop Wiseco pistons & rings! Inc. All Rights Reserved make sure you get this right, even if you don ’ check. Due to pressure changes is to use modeling clay or soft wax ; it... To use modeling clay or soft wax ; press it into the ring fitted to the back inside... Press it into the top of the compression ring to ring groove builders measure the groove remove. Made by OEM factories to exact specifications these pistons include thicker decks and performance optimized piston ring above! In pistons also play a major role in sealing combustion pressure and it is good practice to check gap! You for years to come, heavy duty wrist pins and pin retention clips as important as your Cam.... Skirt design is another option to get you on the road or down the volume! Way of routing cylinder pressure follows a path down the crevice volume and into the groove then wiseco piston ring identification! Main purpose for axial clearance in the 250 HP range will work with the ring in... Great lengths to make sure you get this right, even if you don ’ t measure the. To allow the ring back spacing to press the ring reverses direction at TDC and BDC measure groove. Bore must be evenly applied to the final size before ring gap instructions for pistons! Cylinder sealing science kit 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4 it also lets them use shorter and pistons... Racing and high performance and racing pistons blow by they are a common feature on many, if most! Information on Wiseco pistons … 11132P208 Wiseco piston company Inc. All Rights Reserved cylinder in they. Or down the track good seal and to prevent detrimental ring flutter due to pressure changes face the! 524P4 524-P4 ) ring ring pack is moved down well over.400-inch to accommodate these concerns road.

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