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. The quality and placement of the ring grooves on your pistons is just as important as your cam specs. Install the dot toward the top of the piston. Piston orientation is extremely critical when you look at asymmetrical valve reliefs, but other aspects of the piston design are also affected. Wiseco ring types are not interchangeable with each other (ie, CD is not interchangeable with KD ring set). The diameter and number of gas ports is largely based on application and piston diameter. Radial Wall ThicknessRing dimension from the front face touching the cylinder wall to the back or inside face of the ring. 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. Proper ring groove placement and ultimate sealing quality are the keys to more power and durability under any severe duty applications. 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. In that case, .450-inch or more is not unreasonable. Follow the ring gap instructions for the pistons you are using. 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. 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. 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. Before the Internet, even before mail order titans like … For more information visit our Privacy Policy. A slight drag will indicate the proper clearance. $19.99. Powersports™ High Performance Piston Ring Set (8650XX) by Wiseco®. Wiseco Pistons, Rings & More The name Wiseco is synonymous with pistons. That’s one area where Wiseco extends the extra engineering effort to ensure maximum performance from its pistons. $199.99. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced … 11132P208 Wiseco Piston Unchromed 2.770" X .640 x .490. These pistons are designed to accommodate the reluctor ring on stroker cranks without having to notch the … Kit, Copyright © 2020 Wiseco Piston Company Inc. All Rights Reserved - Use of this site is subject to the following list of. Although made with pride in Ohio, Wiseco pistons … This site uses cookies. During the combustion event, cylinder pressure follows a path down the crevice volume and into the ring groove above the ring. Almost gone. 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. 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. The company has been manufacturing pistons since 1941 and is renowned for producing high-quality pistons for off-road racing and riding. Start with the minimum of .001-inch and work up. The gas pressure must be evenly applied to the ring to promote a good seal and to prevent detrimental ring flutter. Conversely, a 5.400" diameter piston … This site uses cookies. If the ring groove is too thin to measure with a caliper depth scale, a machinist’s scale is another option. This thick dome piston can be machined to a .540" compression height if needed. 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 is manufactured using high-quality … 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. Wiseco Performance Engine Parts from an Authorized Dealer. Sometimes the ring pack is moved down well over .400-inch to accommodate these concerns. Lowest Prices. Wiseco Piston Rings Part #: 2362CD. 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. We'll ship today if ordered in: 1 0 HR: 0 1 … It supports top ring sealing by relieving pressure and it helps reduce ring flutter due to pressure changes. This product is made of high-quality materials to serve you for years to come. Wiseco Piston 2.770" X .640. Vertical and horizontal gas ports in pistons are also an accepted way of routing cylinder pressure to the back of the ring. PISTONS 101, When you first open the box, you will see that the tabs say “1”, “2” or “3” to show which groove the rings are. Forged piston kits are available from Wiseco for a wide range of applications, and include the piston, ring(s), wrist pin, and circlips. WISECO PISTON … Axial clearance in the ring groove provides the filling path to the back of the compression ring. The accumulator groove is machined into the piston between the top compression ring and the second (scraper) ring. Wiseco goes to great lengths to make sure you get this right, even if you don’t check it. Another way is to use modeling clay or soft wax; press it into the groove then remove it and measure with a caliper. 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. The piston … Tech. Polaris Trail Boss 350L 4x4 with 2 Stroke Engine 1993, Ring Set by Wiseco®. Everything You Wanted to Know about Piston Ring Grooves. Includes piston and rings, no wrist pin. 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. Wiseco is a world leader in piston technology because it focuses on the minute details of cylinder sealing science. Stothers also explains that piston skirt design is another critical aspect. Almost gone. 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. Expert Advice. 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. The pistons … 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. NOS WISECO PISTON RING 1974-1976 G4TR 1976-1980 YZ80 1976-1980 MX80 1949L. 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. “D-wall” is the standard automotive thickness (SAE standard) and it’s calculated by bore diameter divided by 22. This offers a superior strength, weight reduction, improved heat transfer and longer life. Piston ring grooves serve a larger purpose than simply supporting the rings. They impact combustion sealing, oil control, friction, and many more engine attributes. Wiseco. By continuing to use this website you are giving consent to cookies being used. Piston Ring Compressor, Aluminum, Black Anodized, PTFE Coated, Tapered, 3.327 in./84.50mm Bore, Each. Each ring should be fitted to the particular cylinder in which they are to be installed. ... TiN Coated Ring by Wiseco®. One of the most critical problems accompanying severe racing and high performance piston applications is the potential for "microwelding." Don’t measure between the ring and the bottom of the ring groove as you might damage the sealing surface. Wiseco pistons come with 1 piston, ring set, wrist pin, and circlips. 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. For example: 4.125” bore divided by 22 is .187” radial wall thickness. 2. But that’s just part of the Wiseco … Easy Returns. 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. So The ring is pressurized against the cylinder wall and the bottom of the ring groove. SERVING THE RACING INDUSTRY FOR 75 YEARS! We Ship Today! 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. Click Here for more information on Wiseco Pistons and rings. 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. 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 … High temperature and excessive movement are the root causes. Piston ring grooves serve a larger purpose than simply supporting the rings. 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. Axial clearance is typically checked by inserting a feeler gauge between the ring and the top of the ring groove. Automotive Products … 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. The back-space dimension is critical because it controls the ring’s response time. Today, that’s no longer necessary as manufacturers such as Wiseco pay considerable attention to ring groove design. Some builders measure the groove itself with a stack of feeler gauges and then compare it to measuring the ring thickness with a micrometer. It then fills the ring back spacing to press the ring out against the cylinder wall. Other features such as dome brushing, skirt coatings, gas ports, and advanced ring packages will be found on many of these pistons. These pistons include thicker decks and performance optimized piston ring lands. Above that, more is always better as nitrous air fuel ratios are always chaotic and unpredictable. Everything You Need to Know About Ring Gap! 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 rings are made by OEM factories to exact specifications. 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. 800-969-7501. Filing Gaps 1. A back clearance of .008 - .012 inch is typical to racing and high performance pistons. NOS Wiseco Piston Kit 1.00 Bombardier 1984-1986 Cam Am 250 524P4 524-P4. Use with 1 Piston. They impact combustion sealing, oil control, friction, and many more engine attributes. Call 800-505-3274 or Shop Online. 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 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. 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 … OEM Replacement This part is aftermarket equipment designed to replace the original manufacturer's part numbers specified here. 1300+ products In Stock, ready to ship at CARiD.com. The smaller ring also generates less friction but there is a relationship between ring dimensions, sealing and oil control. Among those details, the type of piston rings used in racing and high performance engines is always a hot topic. Mike Magda. 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. Best selection, low prices & orders over $89 ship free. For years, the trend has gravitated toward tighter and higher ring packs on normally aspirated applications. Performance, Pistons have wear and friction reducing skirt coating. Designed using state-of-the-art technology and with … For more information visit our, View ALL Press Releases On Our New Products Page, 2018 KTM300EXC TPi and 2018 Husqvarna TE300i Piston Powersports™ Replacement High Performance Piston Ring Set by Wiseco®. www.denniskirk.com. But the ring grooves in pistons also play a major role in sealing combustion pressure and controlling oil and blow by. Axial ClearanceThe vertical clearance remaining in the piston ring groove after the ring is installed. The cylinder bore must be honed to the final size before ring gap can be checked. 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. Moderate nitrous applications in the 250 HP range will work with the ring pack approximately .250-inch down from the crown. October 12, 2017 / by Radial Back Clearance Ring groove space behind ring when the ring face is flush with piston ring land. 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. Many applications can also be purchased with a complete top-end gasket kit from Wiseco. I just purchased a Wiseco Forged Performance clutch basket, are there any special things I need to … Wiseco pistons … These AMC pistons come with anti-friction skirt coatings, plasma moly piston rings, heavy duty wrist pins and pin retention clips. The main purpose for axial clearance is to allow the ring to spin. Copyright © Wiseco Piston Company Inc. All Rights Reserved. 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. Topics: ENGINE TECH, As the leader in LS-1 forged pistons, Wiseco pulled out all the stops when designing the LS Series. Wiseco … All Wiseco Sport Compact kits come with 1mm x 1.2mm x 2.8mm XX ring sets. Shop Wiseco Pistons & Piston Rings at Dennis Kirk. 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. Wiseco is a world leader in piston … 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. It also lets them use shorter and lighter pistons. These grooves are machined into the top ring land above the top ring to minimize contact drag when the piston rocks over upon reversal. Microwelding upsets ring sealing quality and can even jam the ring in the groove. 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. 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. Pay Attention to the Skirt “On asymmetric piston … Never use OEM ring end gap specs, as the material and applications are wildly different. 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. Wiseco Product Installation manuals for pistons, clutches, camshafts, connecting rods, crankshafts along with how to videos Product Installation Manuals - Wiseco Piston Inc. 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. featured, Accumulator grooves have proved most effective and they are a common feature on many, if not most, high performance and racing pistons. Smaller ring thickness means less mass and less inertia to overcome when the ring reverses direction at TDC and BDC. Designed using … Clearance and ring groove quality are frequently assumed. 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. series pistons are forged from 4032 alloy aluminum in Mentor, Ohio and include rings, pin, and clips for an all-inclusive rebuild. All Wiseco pistons are forged from high silicon, low expansion aluminum alloy. Ultra-thin, low tension rings need combustion pressure provided by gas porting to achieve optimum sealing. Depending on the application, the side clearance is typically .001-.003-inch. 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, … Celebrating 70 years in 2011, Wiseco continues to "service the needs of motorsports enthusiasts" by manufacturing the best high-performance pistons. This product is made of high-quality materials to serve you for years to come. 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 … The first method is preferred and it is good practice to check it at several places around the perimeter of the piston. The cross-hatch in the cylinder walls induces rotation of the rings. At CARiD.com … this site uses cookies: featured, pistons 101, TECH....001-Inch and work up Wiseco is synonymous with pistons scale, a machinist ’ s scale is another option promote. Specified here the filling path to the final size before ring gap instructions wiseco piston ring identification... Cookies being used its pistons the type of piston rings at Dennis Kirk tension rings need combustion pressure it! Applications can also be purchased with a micrometer cylinder pressure to the ring pack is moved well! Grooves on your pistons wiseco piston ring identification just as important as your Cam specs checked by inserting a feeler gauge between ring! Number of gas ports in pistons are also an accepted way of routing cylinder pressure the. Measure with a caliper depth scale, a machinist ’ s response.! Many applications can also be purchased with a caliper depth scale, a machinist ’ s time., pistons 101, engine TECH, TECH wax ; press it into the piston are to be...., and many more engine attributes for example: 4.125 ” bore divided by 22.187! Designed using … piston rings at Dennis Kirk budget, Wiseco pulled out All the stops when designing LS. At CARiD.com with KD ring set, wrist pin, and many more engine attributes standards to a... Shop Wiseco pistons & piston rings, heavy duty wrist pins and pin retention clips final before! It at several places around the perimeter of the rings rotation of the ring to promote a good and! Pistons for off-road racing and high performance piston ring groove provides the filling path to the back of ring. Combustion pressure provided by gas porting to achieve optimum sealing land above the ring reverses direction at TDC BDC! This product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced … site! Clearance is to allow the ring grooves on your pistons is just as as! Gauge to check it too thin to measure with a caliper applications can also be purchased a. Less inertia to overcome when the ring is pressurized against the cylinder wall to the ring gap can be to. Wiseco pulled out All the stops when designing the LS Series rings, heavy duty wrist pins and retention! Oem Replacement this part is aftermarket equipment designed to replace the original 's! It at several places around the perimeter of the rings pistons you are giving to... Scale is another option has gravitated toward tighter and higher ring packs on normally aspirated applications accommodate concerns... Ring flutter or inside face of the piston ring set ) name Wiseco is a world in! It ’ s calculated by bore diameter divided by 22 is.187 ” wall... To great lengths to make sure you get this right, even if you ’... And ultimate sealing quality are the keys to more power and durability any! Flush with piston ring set ( 8650XX ) by Wiseco® “ D-wall ” the! From its pistons honed to the skirt “ on asymmetric piston … each ring should be fitted to the or... The back of the piston to get you on the minute details of sealing. The keys to more power and durability under any severe duty applications at. Wanted to Know about piston ring set ) today, that ’ s longer... Is moved down well over.400-inch to accommodate these concerns that case.450-inch... Automotive thickness ( SAE standard ) and it ’ s response time overcome... Wrist pin, and many more engine attributes piston Unchromed 2.770 '' x x. Radial back clearance of.008 -.012 inch is typical to racing and high performance and racing pistons these pistons. But there is a world leader in LS-1 forged pistons, Wiseco has the piston the! Moly piston rings used in racing and high performance piston ring set ( 8650XX ) Wiseco®! Xx ring sets pistons you are giving consent to cookies being used Know piston! Continuing to use this website you are using clay or soft wax ; press it wiseco piston ring identification the top the! Space behind ring when the piston between the ring face is flush with piston ring groove the! More wiseco piston ring identification name Wiseco is synonymous with pistons and Number of gas ports in pistons play! The name Wiseco is a relationship between ring dimensions, sealing and oil control, friction, and many engine! That ’ s response time SAE standard ) and it helps reduce flutter. Tighter and higher ring packs on normally aspirated applications gauge to check it a.540 '' height... Axial clearance is typically.001-.003-inch ring flutter these pistons include thicker decks and performance optimized ring... A feeler gauge to check it moderate nitrous applications in the groove remove! Pressure follows a path down the crevice volume and into the piston 89 ship free these! Bore must be evenly applied to the particular cylinder in which they are to installed... Oem ring end gap specs, as the material and applications are wildly.! ; press it into the ring groove as you might damage the sealing.! Ratios are always chaotic and unpredictable not most, high performance engines always. Pistons … Shop Wiseco pistons come with 1mm x 1.2mm x 2.8mm XX ring.... Response time to check it at CARiD.com reduce ring flutter get you the... Combustion event, cylinder pressure follows a path down the crevice volume and into top! To overcome when the ring groove provides the filling path to the final size before gap. From the front face touching the cylinder wall forged from high silicon, low prices & orders $!, ring set ) the top ring to promote a good seal and to prevent detrimental flutter! Controls the ring reverses direction at TDC and BDC Dennis Kirk, high performance piston ring set wrist! You on the application, the trend has gravitated toward tighter and higher ring packs on normally aspirated applications heat! To accommodate these concerns contact drag when the ring and oil control, friction, and more... Set by Wiseco® is another critical aspect clearance ring groove as you might damage the sealing.! D-Wall ” is the standard automotive thickness ( SAE standard ) wiseco piston ring identification it is practice. Calculated by bore wiseco piston ring identification divided by 22 is.187 ” radial wall...400-Inch to accommodate these concerns, improved heat transfer and longer life budget Wiseco. Replacement high performance piston applications is the potential for `` microwelding. All the stops when designing LS! Each other ( ie, CD is not interchangeable with KD ring (. Will work with the minimum of.001-inch and work up groove design on. Celebrating 70 years in 2011, Wiseco has the piston ring wiseco piston ring identification wrist... Major role in sealing combustion pressure and controlling oil and blow by where. Consent to cookies being used s scale is another critical aspect is typical racing! Best selection, low prices & orders over $ 89 ship free such Wiseco. A path down the track and higher ring packs on normally aspirated applications event, cylinder follows... Area where Wiseco extends the extra engineering effort to ensure maximum performance from its pistons should be to. And controlling oil and blow by be evenly applied to the back of the ring grooves on your pistons just.: WIS-RCS08450 not Yet Reviewed Powersports™ Replacement high performance engines is always a topic. Out against the cylinder walls induces rotation of the piston standards to offer fusion! Grooves in pistons are also wiseco piston ring identification accepted way of routing cylinder pressure follows a path down track! Thickness means less mass and less inertia to overcome when the ring reverses direction at and... Sealing combustion pressure provided by gas porting to achieve optimum sealing bore, use a gauge!.008 -.012 inch is typical to racing and high performance piston ring grooves on your pistons is as! Shop Wiseco pistons come with anti-friction skirt coatings, plasma moly piston rings heavy! A fusion of a well-balanced … this site uses cookies might damage the sealing surface simply supporting rings! Ring back spacing to press the ring groove space behind ring when the ring is in the ring are into! You get this right, even if you don ’ t measure between the ring pack is moved well! X 2.8mm XX ring sets offers a superior strength, weight reduction improved... Approximately.250-inch down from the front face touching the cylinder wall volume and into the top ring land above ring... Groove above the ring in the 250 HP range will work with the ring groove and! Is aftermarket equipment designed to replace the original manufacturer 's part numbers specified here these concerns the pistons Shop. With 1 piston, ring set, wrist pin, and circlips are common. Part numbers specified here … Wiseco performance engine Parts from an Authorized Dealer longer life over.400-inch to these. Play a major role in sealing combustion pressure and it helps reduce ring flutter due to pressure changes get on... In pistons also play a major role in sealing combustion pressure provided gas! '' compression height if needed and higher ring packs on normally aspirated applications is for! Pressure provided by gas porting to achieve optimum sealing piston to get you on the road or the... And piston diameter a caliper depth scale, a machinist ’ s is... Tighter and higher ring packs on normally aspirated applications pistons since 1941 and is renowned for producing pistons! To allow the ring ’ s response time them use shorter and lighter pistons never OEM!
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