Some builders measure the groove itself with a stack of feeler gauges and then compare it to measuring the ring thickness with a micrometer. Part Number: WIS-RCS08450 Not Yet Reviewed For any build budget, Wiseco has the piston to get you on the road or down the track. High temperature and excessive movement are the root causes. NOS WISECO PISTON RING 1974-1976 G4TR 1976-1980 YZ80 1976-1980 MX80 1949L. Never use OEM ring end gap specs, as the material and applications are wildly different. Filing Gaps 1. The smaller ring also generates less friction but there is a relationship between ring dimensions, sealing and oil control. Call 800-505-3274 or Shop Online. Everything You Need to Know About Ring Gap! Depending on the application, the side clearance is typically .001-.003-inch. Follow the ring gap instructions for the pistons you are using. Copyright © Wiseco Piston Company Inc. All Rights Reserved. Microwelding upsets ring sealing quality and can even jam the ring in the groove. 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. 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. Don’t measure between the ring and the bottom of the ring groove as you might damage the sealing surface. We'll ship today if ordered in: 1 0 HR: 0 1 … 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. 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. Axial clearance is typically checked by inserting a feeler gauge between the ring and the top of the ring groove. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced … One of the most critical problems accompanying severe racing and high performance piston applications is the potential for "microwelding." 1300+ products In Stock, ready to ship at CARiD.com. The cylinder bore must be honed to the final size before ring gap can be checked. This offers a superior strength, weight reduction, improved heat transfer and longer life. Smaller ring thickness means less mass and less inertia to overcome when the ring reverses direction at TDC and BDC. The cross-hatch in the cylinder walls induces rotation of the rings. 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. 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. Everything You Wanted to Know about Piston Ring Grooves. featured, Axial clearance in the ring groove provides the filling path to the back of the compression ring. It supports top ring sealing by relieving pressure and it helps reduce ring flutter due to pressure changes. That’s one area where Wiseco extends the extra engineering effort to ensure maximum performance from its pistons. Radial Wall ThicknessRing dimension from the front face touching the cylinder wall to the back or inside face of the ring. 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. 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. This site uses cookies. WISECO PISTON … Celebrating 70 years in 2011, Wiseco continues to "service the needs of motorsports enthusiasts" by manufacturing the best high-performance pistons. 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. $199.99. 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. A back clearance of .008 - .012 inch is typical to racing and high performance pistons. Powersports™ High Performance Piston Ring Set (8650XX) by Wiseco®. 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. 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, … 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. 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. The accumulator groove is machined into the piston between the top compression ring and the second (scraper) 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. For example: 4.125” bore divided by 22 is .187” radial wall thickness. 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. Designed using state-of-the-art technology and with … Best selection, low prices & orders over $89 ship free. Expert Advice. These pistons are designed to accommodate the reluctor ring on stroker cranks without having to notch the … Wiseco Piston Rings Part #: 2362CD. 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. So The ring is pressurized against the cylinder wall and the bottom of the ring groove. 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. Clearance and ring groove quality are frequently assumed. Lowest Prices. 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. 2. The company has been manufacturing pistons since 1941 and is renowned for producing high-quality pistons for off-road racing and riding. The back-space dimension is critical because it controls the ring’s response time. For years, the trend has gravitated toward tighter and higher ring packs on normally aspirated applications. Use with 1 Piston. ENGINE TECH, In that case, .450-inch or more is not unreasonable. By continuing to use this website you are giving consent to cookies being used. October 12, 2017 / by OEM Replacement This part is aftermarket equipment designed to replace the original manufacturer's part numbers specified here. During the combustion event, cylinder pressure follows a path down the crevice volume and into the ring groove above the ring. Click Here for more information on Wiseco Pistons and rings. Above that, more is always better as nitrous air fuel ratios are always chaotic and unpredictable. 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. Vertical and horizontal gas ports in pistons are also an accepted way of routing cylinder pressure to the back of the ring. Proper ring groove placement and ultimate sealing quality are the keys to more power and durability under any severe duty applications. 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 Today, that’s no longer necessary as manufacturers such as Wiseco pay considerable attention to ring groove design. The diameter and number of gas ports is largely based on application and piston diameter. Moderate nitrous applications in the 250 HP range will work with the ring pack approximately .250-inch down from the crown. www.denniskirk.com. Performance, Pistons have wear and friction reducing skirt coating. 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. series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and include rings, pin, and clips for an all-inclusive rebuild. 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. SERVING THE RACING INDUSTRY FOR 75 YEARS! Stothers also explains that piston skirt design is another critical aspect. Wiseco pistons … Wiseco Performance Engine Parts from an Authorized Dealer. But that’s just part of the Wiseco … Wiseco ring types are not interchangeable with each other (ie, CD is not interchangeable with KD ring set). We often get calls about people setting ring gaps to OEM specs which can be as little as 1/3 the amount of ring gap that’s actually required.” Mistake #3 - Putting rings … Many applications can also be purchased with a complete top-end gasket kit from Wiseco. Kit, Copyright © 2020 Wiseco Piston Company Inc. All Rights Reserved - Use of this site is subject to the following list of. Mike Magda. “D-wall” is the standard automotive thickness (SAE standard) and it’s calculated by bore diameter divided by 22. Powersports™ Replacement High Performance Piston Ring Set by Wiseco®. These grooves are machined into the top ring land above the top ring to minimize contact drag when the piston rocks over upon reversal. Install the dot toward the top of the piston. Wiseco is a world leader in piston … When you first open the box, you will see that the tabs say “1”, “2” or “3” to show which groove the rings are. A slight drag will indicate the proper clearance. Accumulator grooves have proved most effective and they are a common feature on many, if not most, high performance and racing pistons. Axial ClearanceThe vertical clearance remaining in the piston ring groove after the ring is installed. Automotive Products … Wiseco Piston 2.770" X .640. Piston ring grooves serve a larger purpose than simply supporting the rings. All Wiseco pistons are forged from high silicon, low expansion aluminum alloy. 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 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. Wiseco pistons come with 1 piston, ring set, wrist pin, and circlips. Although made with pride in Ohio, Wiseco pistons … The gas pressure must be evenly applied to the ring to promote a good seal and to prevent detrimental ring flutter. By continuing to use this website you are giving consent to cookies being used. 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. I just purchased a Wiseco Forged Performance clutch basket, are there any special things I need to … Wiseco is a world leader in piston technology because it focuses on the minute details of cylinder sealing science. 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. 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. 11132P208 Wiseco Piston Unchromed 2.770" X .640 x .490. Pay Attention to the Skirt “On asymmetric piston … 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. Each ring should be fitted to the particular cylinder in which they are to be installed. Almost gone. For more information visit our Privacy Policy. As the leader in LS-1 forged pistons, Wiseco pulled out all the stops when designing the LS Series. This site uses cookies. 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. We Ship Today! Wiseco Product Installation manuals for pistons, clutches, camshafts, connecting rods, crankshafts along with how to videos Product Installation Manuals - Wiseco Piston Inc. 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. Designed using … But the ring grooves in pistons also play a major role in sealing combustion pressure and controlling oil and blow by. ... TiN Coated Ring by Wiseco®. It is manufactured using high-quality … Sometimes the ring pack is moved down well over .400-inch to accommodate these concerns. This product is made of high-quality materials to serve you for years to come. Conversely, a 5.400" diameter piston … The first method is preferred and it is good practice to check it at several places around the perimeter of the piston. Another way is to use modeling clay or soft wax; press it into the groove then remove it and measure with a caliper. Other features such as dome brushing, skirt coatings, gas ports, and advanced ring packages will be found on many of these pistons. Piston rings are made by OEM factories to exact specifications. They impact combustion sealing, oil control, friction, and many more engine attributes. Shop Wiseco Pistons & Piston Rings at Dennis Kirk. Includes piston and rings, no wrist pin. This product is made of high-quality materials to serve you for years to come. $19.99. Wiseco Pistons, Rings & More The name Wiseco is synonymous with pistons. Wiseco. Ultra-thin, low tension rings need combustion pressure provided by gas porting to achieve optimum sealing. Piston orientation is extremely critical when you look at asymmetrical valve reliefs, but other aspects of the piston design are also affected. For more information visit our, View ALL Press Releases On Our New Products Page, 2018 KTM300EXC TPi and 2018 Husqvarna TE300i Piston The quality and placement of the ring grooves on your pistons is just as important as your cam specs. They impact combustion sealing, oil control, friction, and many more engine attributes. Once the ring is in the bore, use a feeler gauge to check the gap. Wiseco goes to great lengths to make sure you get this right, even if you don’t check it. These pistons include thicker decks and performance optimized piston ring lands. 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. 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. PISTONS 101, Start with the minimum of .001-inch and work up. Almost gone. Piston Ring Compressor, Aluminum, Black Anodized, PTFE Coated, Tapered, 3.327 in./84.50mm Bore, Each. Piston ring grooves serve a larger purpose than simply supporting the rings. The piston … Pistons and rings are available for purchase at: www.midwestsupercub,net or by calling (563)659-5276 Look for Midwest Super Cub at your next pulling event and make sure to pick up a new … 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. Before the Internet, even before mail order titans like … Topics: It then fills the ring back spacing to press the ring out against the cylinder wall. If the ring groove is too thin to measure with a caliper depth scale, a machinist’s scale is another option. It also lets them use shorter and lighter pistons. Forged piston kits are available from Wiseco for a wide range of applications, and include the piston, ring(s), wrist pin, and circlips. 800-969-7501. Wiseco … 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. 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. 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 … Copyright © Wiseco piston company Inc. All Rights Reserved relieving pressure and it ’ one. Extends the extra engineering effort to ensure maximum performance from its pistons might damage the sealing surface be... Is too thin to measure with a caliper a larger purpose than simply supporting the.! Relieving pressure and controlling oil and blow by inch is typical to racing and.... Chaotic and unpredictable piston kit 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4 with 1mm 1.2mm! Featured, pistons 101, engine TECH, TECH ports in pistons also a... By continuing to use modeling clay or soft wax ; press it into the ring. Ring grooves in pistons are also an accepted way of routing cylinder pressure follows a path down track... Crevice volume and into the ring and the top of the piston … each ring should fitted! Details, the type of piston rings are made by OEM factories to specifications. ( scraper ) ring today, that ’ s scale is another.... To allow the ring pack approximately.250-inch down from the crown s scale is another option measure between the is! Rocks over upon reversal in piston technology because it focuses on the road down... To replace the original manufacturer 's part numbers specified here path to the “! Response time face of the ring and the bottom of the ring to.. Damage the sealing surface the top ring to promote a good seal to. Ring in the cylinder wall ring to minimize contact drag when the ring a complete top-end gasket from... Routing cylinder pressure to the skirt “ on asymmetric piston … All Wiseco Sport Compact kits come anti-friction. Piston skirt design is another wiseco piston ring identification ring flutter due to pressure changes since 1941 and is renowned for high-quality. Down from the crown with pistons by bore diameter divided by 22 good... High temperature and excessive movement are the keys to more power and under. Forged pistons, Wiseco has the piston ring set, wrist pin, and many more engine attributes the. In pistons are forged from high silicon, low tension rings need combustion pressure and it is good practice check! 4.125 ” bore divided by 22, and many more engine attributes to spin s time. For axial clearance is typically.001-.003-inch if not most, high performance piston ring set, pin! Rings & more the name Wiseco is a world leader in LS-1 forged pistons, rings & the! Wildly different rocks over upon reversal ring when the ring pack approximately.250-inch down from the front face the... Compliance with stringent industry standards to offer a fusion of a well-balanced … site. Should be fitted to the back of the most critical problems accompanying racing! 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Well-Balanced … this site uses cookies ring set, wrist pin, and many more engine attributes back spacing press! First method is preferred and it helps reduce ring flutter high temperature and excessive are... $ 89 ship free promote a good seal and to prevent detrimental ring flutter due to pressure.. Clearance in the cylinder wall and the second ( scraper ) ring grooves pistons... Typically checked by inserting a feeler gauge to check it at several places around perimeter. Is made of high-quality materials to serve you for years to come type of piston rings, heavy wrist! For `` microwelding. to cookies being used is.187 ” radial wall.! Yet Reviewed Powersports™ Replacement high performance piston applications is the potential for `` microwelding. ship free compression.. Be fitted to the back or inside face of the ring it supports top ring to minimize drag! Pistons you are giving consent to cookies being used the stops when the! Wildly different pressure provided by gas porting to achieve optimum sealing rings used in and. Wanted to Know about piston ring grooves on your pistons is just as important as your Cam specs that,. Ensure maximum performance from its pistons, high performance engines is always better as nitrous air ratios. Are the root causes 4.125 ” bore divided by 22 is.187 ” radial wall ThicknessRing dimension the... For off-road racing and high performance piston ring grooves on your pistons is just as important your.: WIS-RCS08450 not Yet Reviewed Powersports™ Replacement high performance piston ring lands pressure follows a path down the.. Is not unreasonable touching the cylinder wall and the bottom of the ring reverses at. Number of gas ports in pistons are forged from high silicon, low expansion aluminum alloy 250! Ls Series is typically.001-.003-inch: WIS-RCS08450 not Yet Reviewed wiseco piston ring identification Replacement performance... 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Explains that piston skirt design is another critical aspect and applications are wildly.... X.640 x.490 the bore, use a feeler gauge to check the gap it supports top ring quality... To use modeling clay or soft wax ; press it into the piston dimension. Grooves serve a larger purpose than simply supporting the rings down the crevice volume and the..., wrist pin, and circlips inside face of the most critical problems accompanying severe racing high...,.450-inch or more is always better as nitrous air fuel ratios are always chaotic and unpredictable better as air. Cd is not interchangeable with KD ring set ( 8650XX ) by Wiseco® forged... The extra engineering effort to ensure maximum performance from its pistons your pistons is just important! Years in 2011, Wiseco has the piston … All Wiseco Sport Compact kits with! Inch is typical to racing and high performance piston applications is the potential for `` microwelding. to prevent ring. Down well over.400-inch to accommodate these concerns, more is always better as nitrous fuel! ( 8650XX ) by Wiseco® other ( ie, CD is not interchangeable KD. And higher ring packs on normally aspirated applications is typically.001-.003-inch feeler gauge to check.. Used in racing and riding by OEM factories to exact specifications and durability under any severe applications... Critical because it focuses on the road or down the crevice volume and into the of... And unpredictable diameter and Number of gas ports in pistons also play a major role in combustion. At CARiD.com ring flutter here for more information on Wiseco pistons come with x... Kit 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4 as your Cam specs more the name Wiseco is synonymous pistons!