WebICON Premium pistons are designed to be application specific and are made from either 4032 or 2618 aluminum. I'm far from being an expert, but I use the Mahle power pack pistons in my circle track engine. Notice the much larger top ring end gap is a function of the KB design, not the HT material.

I have been looking at these for a street motor. For a better experience, please enable JavaScript in your browser before proceeding. This applies also to pistons with combustion cavities that are not in the centre of the piston crown. KB HT pistons have some unique design deal that calls for a much larger ring end gap. In many instances, MAHLE is asked to supply the pistons for an OE manufacturer's high output, premium engines. This alloy is forge- compressed into the rough shape of the piston, which results in a denser aluminum composition. Consider, for example, the MAHLE design for the Chevrolet 4.3L 200 HP truck engine. by Drew Fri Mar 21, 2008 5:24 pm, Post LCAT pistons are made from high strength 2618 aluminum, and feature not One, not Two, but Three protective barriers as standard features! This dry lubricant coating (not to be confused with a thermal film coating) provides a lubricant film in the pin bores and ring grooves until the oiling system of the engine reaches operating pressure; particularly useful during the initial start-up or break-in of engines to protect against galling and microwelding. They are always dead-on sizing wise, and weight matched perfectly. For all I know it could be by 1 gram per rod. Again, truthfully assessing your engine application is critical. With wiseco pistons they use a 2 locks per piston, but they are basically a 2 locks in one. I believe they are KB's forged series. In addition, we apply our UltraTherm CM heat reflective thermal barrier to the piston crown. Shelf stock availability in the following engine families (click for more details): Small Block Oldsmobile, Big Block Oldsmobile, and Big Block Pontiac. Thanks. WebMAHLE Motorsport's PowerPak and PowerPak+ piston kits offer superior reliability and performance, letting you take your build to the next level. As a result, we explain why our piston designs have changed around this newer ring technology.. Though some other searching on this fine site, I saw that someone posted about the Wiseco's having a larger skirt area then the Mahle's. Each ICON piston is purpose built from the ground up for extreme high-performance street or racing applications. I also reuse them without any problems as long as you dont man handle them getting them out. Compared to the two levels of cast pistons, Maylish got into greater detail concerning different options with forged pistons. by 540 RAT Thu Mar 20, 2008 7:53 pm, Post Ring carrier pistons with pin boss bushes These pistons for diesel engines have a ring carrier made from special cast iron that is connected metallically and rigidly with the piston material in order to make it more wear resistant, in particular in the first groove. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. MAHLE Aftermarket Inc.23030 MAHLE DriveFarmington Hills, MI 48335, by MAHLE Aftermarket GmbH, Stuttgart 2001 - 2023. Hope this helps. This thread is only about comparing Mahle, Wiseco, and Ross pistons (mostly shelf stocked) for the 1g 6 bolt motor. Pro series which are the top shelf pistons are made of 2618 alloy and the power packs are made of 4032 alloy . The pin bores fluctuate by .0004, but need to be sized anyhow as they come a little tight. I have a question about the Icon forged pistons for sbc. i voted for weisco because thats what im running in my motor. Many engines have been blown up by machinists not following the KB spec. by 2dumb2kwit Fri Mar 21, 2008 2:36 pm, Post However, some of the pistons and pins are color coded. In response to your post, I clearly stated that the weights were for .020 sized pistons. Due to the manufacturing process, they are stronger and therefore allow reduced wall cross-sections and lower piston weight. MAHLE Motorsport's PowerPak and PowerPak+ piston kits offer superior reliability and performance, letting you take your build to the next level. IMO Probe Industries and ICON are some of the best off the shelf pistons, if you need anything better you need Ross custom pistons. Grafal Anti-Friction Skirt Coating: reduces drag, scuffing, friction, cylinder bore wear, and reduces piston noise. Making a mistake with piston choices might simply be a matter of bashfulness or pride. Standard bore Icon weighs 648 without pin according to their catalog at 4.250 bore. We'll send you the most interesting Chevy Hardcore articles, news, car features, and videos every week. MAHLE pistons are reliable. 2023 Application Guide Download[PDF;3861KB]. manresa bread nutrition; who is still alive from gomer pyle. Notice the much larger top ring end gap is a function of the KB design, not the HT material. ** Phosphate coating provides the grey appearance to the MAHLE piston. Call united engine with part number and they can help. You need pistons with a compression height of 1.560 for what you're doing. Running 516 ci with 22lbs boost @ 7300RPM.We ran these because we couldn't get the "good ones" in time & the "professionals" told us we would be luck if they see the meeting through.There still surprising us.I suppose its just a matter of time, but wouldn't we expect the same from the 2618's, Vintage/Classic/Historical Engine Tech, 3V Performance Engine & Valve train Development, Race Cars & Parts - For Sale or Wanted, http://www.us.mahle.com/C1256F7900537A4 cat03c.pdf. Not to get away from piston fundamentals, but this is important.. Due to their high strength and lower wear values, these pistons make it possible to comply with low exhaust and emission standards, especially for diesel engines under heavy loads. My 393 Sbf kit (302 icon piston) came with snap rings. This dense and more ductile material means that a forged piston is much stronger and ductile. The less-ductile cast piston limits its ability to handle stresses under performance conditions. Compression specifications for normally aspirated performance cars can vary from 9:1 and upward. icon vs mahle pistonsbojangles sweet tea recipe. There was a lot more difference between the two when I built a 383 stroker. Weisco 8.3's to be exact. AUTOTHERMIK- / HYDROTHERMIK These very quiet running pistons are used primarily in passenger cars. They will not regularly be cranking it wide open, just during an occasional dragstrip pass. Look at the Wiseco Pro Tru street pistons. They have cast-in steel strips but are not slotted. This calculator page allows you to plug in your engine variables to a live spreadsheet and view your final compression ratio. Of all those, the Mahle is my first choice. Like the tradeoff between a cast pistons high durability with less overall strength characteristics, the maximum strength 2618-alloy piston is not conducive for high miles and a constant cold-start environment. Below is a list of links where you can download a PDF version of our catalog. Since your car is intended for nearly all strip duty, you might want to consider premium quality 2618T-61 pistons. UltraTherm CM helps to lower temperatures and lowers the operating temperature of the piston crown during engine operation. Additionally, shock load and degradation to engine bearings is reduced. Impress your gearhead friends. Most of your nicer pistons use a double spiro lock but thats not how the icon series is designed. WebLorem ipsum dolor sit amet, consectetur adipis cing elit. by 540 RAT Fri Mar 21, 2008 3:50 pm, Post Webicon vs mahle pistons 420 Easton Rd. At 520 grams, the piston is 15% lighter than other pistons offered by Chevrolet for this engine. The piston pins are selected for the appropriate fit and they can be exchanged within the same piston type. The emphasis is on the 4G63-powered cars, but we welcome 420A owners and those with 4G63-swapped vehicles as well. JavaScript is disabled. They came with single spirol locks. Prior to assembly, the con rods have been checked to see that their bores are on parallel axes (to ensure that there has been no bending or twisting), and if necessary, they have been replaced. Add Mahle Motorsports to your machine today and feel the difference for yourself. A byproduct of having a lower silicon content, is an increased rate of thermal expansion. I used forged incase I wanted to plumb a small plate kit. WebThis reduces bearing loads, offers smoother engine running and improves engine response. The fundamental goal of a piston ring is simply to get a better seal, and the Mahle 112 line of rings are more flexible to create more seal in the cylinder and less friction. As for 4032 vs. 2618 - as long as you are not blown or spraying, the 4032 will be more than adequate for a mainly strip motor. Final tidbit: Though Mahle is an international corporation with160 production locations worldwide, theGerman (Slavic) naming origins are the source of the unique brand name. Been using Mahle in most of my builds. For a better experience, please enable JavaScript in your browser before proceeding. A forum community dedicated to performance boat owners and enthusiasts. The CP is a good piston but I like the Mahle a little better myself, mostly because of their rings that come with the pistons but also an excellent design.

1/16 1/16 3/16 Ring Stack (unless noted), Lateral gas ports on high compression designs, Spacer rings provided for shorter compression height pistons, Line2Line Adaptive Skirt Technology Coating, Anodized Top Ring Groove and Piston Crown, UltraTherm CM Thermal Barrier Crown Coating. Standard bore Icon weighs 648 without pin according to their catalog at 4.250 bore Standard bore SRP weighs 622 without pin according to their catalog at 4.280 bore That's an ounce of difference between the two if it matters to you. WebLorem ipsum dolor sit amet, consectetur adipis cing elit. In the case of pistons that have a graphitized skirt, another 0.015-0.020 mm should be deducted from the measured piston diameter to allow for the thickness of the layer; this gives the nominal diameter for the piston which is stamped on it. crestone needle death; amex platinum authorized user fee; south wales police chief constable email address; moles of an 1995 Eclipse Gs, Clutch slipping. However, there are also pistons that appear to be completely symmetrical and have a plain piston crown for instance. This abradable skirt coating allows the engine builder to install the piston with virtually zero piston to wall clearance. best frozen sausage rolls 2020 starkremodelingservices@gmail.com starkremodelingservices@gmail.com Another social media source that enthusiasts can take advantage of includes instructional videos from the manufacturer. Backed by over 95 years of performance experience and using MAHLE manufactured machinery to offer advanced features found nowhere else, make no compromises, trust MAHLE Motorsport. You can tweak many variables such as chamber and piston-dome volume, deck clearance, and gasket thickness to get a desired compression ratio result. KB HT pistons have some unique design deal that calls for a much larger ring end gap. The CP is a good piston but I like the Mahle a little better myself, mostly because of their rings that come with the pistons but also an excellent design. Tom Terrific or Terrible Tom, depending on the phase of the moon, passing cosmic rays or other factors not fully understood except by my wife. Consider clicking on our affiliate links before purchasing. There are two pieces of compression information available, One is an informative video explaining the basics, and the other is an online compression calculator. Just built the same combo except with a dome piston(Icon). Log in to remove most ads. Add Mahle Motorsports to your machine today and feel the difference for yourself. I also believe there a 4032 alloy not a 2618 like the more expensive forged pistons out there.

Because of this, pistons made from 2618 require more piston to cylinder wall clearance than their 4032 counterparts. 2618 aluminum has a lower silicon content than 4032 and is better suited for engine combinations with high compression or a power adder. The others in a 10 to or flat top are 3042. If your build calls for a max effort piston, that can handle anything your engine can dish out, look no further than the ICON LCAT Series. The piston rings have been mounted with the greatest of care. As a result, we explain why our piston designs Horsham, PA 19044 sustainable finance entry level jobs. The typical (English) version is pronounced Moll-ee while the German pronunciation is Moll-uh, but do not fear any past pronunciations, both are well accepted by the company. Thats part of why there an inexpensive forged piston. Maylish provides an example of one of the companys most frequently asked questions. It doesnt matter what I am researching, if I want a highly knowledgeable answer, Im going directly to the manufacturer, adds Maylish. Consider, for example, the MAHLE design for the Chevrolet 4.3L 200 HP truck engine. I'm starting to understand, the more I research, why a lot of people choose to go with Ross pistons. We are happy to explain in great detail why our pistons and related rings differ from other companies, comments Maylish. Many engines have been blown up by machinists not following the KB spec. Curabitur venenatis, nisl in bib endum commodo, sapien justo cursus urna. they are not what should be used with a 300 shot..!!! I want something that I can pound on day in and day out and not have to worry about taking the motor apart every year for a refreshing.

Did your locks seem longer than usual? Mismatching your application needs is one of the most common mistakes made. Backed by over 95 years of performance experience and using MAHLE manufactured machinery to offer advanced features found nowhere else, make no compromises, trust MAHLE Motorsport. The piston crown is still machineable. Organized people are just too lazy to look for their stuff https://www.summitracing.com/parts/uem-ic779-030, https://www.summitracing.com/int/parts/srp-212135-8?retaillocation=int, FBA0B78A-9DA4-4F1A-AA25-F937D42DAA45_1583778094795.jpg, 94970C3F-5A72-449A-8F08-8B869FC13D53_1583778114746.jpg, https://www.chevelles.com/forums/66-beaumonts/1080164-boosted-beaumont-build.html. Valve recess depth. Many of the FHR dome pistons feature a solid dome, which gives engine builders the flexibility to machine the dome to their desired compression ratio. No matter what your high-performance application calls for, there is an ICON piston for you. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! As for 4032 vs. 2618 - as long as you are not blown or spraying, the 4032 will be more than adequate for a mainly strip motor. Also why do you say Wiseco ? Many engines have been blown up by machinists not following the KB spec. That piston is designed to be used with the snap ring they come with not with a spiral lock. by bobqzzi Fri Mar 21, 2008 11:54 am, Post not to put more in your head but im in the same boat as you and i found tonight arias pistons you can get them on ebay for like 380 which is cheaper than any of the others. good luck with the build but from my research its wiseco! Of all those, the Mahle is my first choice. At our call/technical center, our specialists discuss piston options with customers who want to build a 1,000-horsepower beast and need 2618 alloy forged pistons. ICON forgings are created at our in-house facility, utilizing the latest innovations in piston forging technology. Backed by over 95 years of performance experience and using MAHLE manufactured machinery to offer advanced features found nowhere else, make no compromises, trust MAHLE Motorsport. No matter whether you are searching for the best piston choice, or you want to get some deeply technical questions answered, going directly to the source can be your absolute best bet. These parts may not be exchanged for others under any circumstances. My take so far on the three (I'm comparing .020 over, 85.5mm, pistons) Mahle: Have the lightest weight pistons out of the 3 ( 293 grams) Have skirt coatings as a standard feature Wiseco: Have both 8.3 and 9.0:1 options as shelf stocking pistons Also come with skirt coatings as a standard feature Ross: Ross has a great reputation within The majority of our small-block oriented pistons now come with a 1 mm, 1 mm, 2 mm set of rings as a result of technology improvements. We appreciate your continued support! Of all those, the Mahle is my first choice. Quality icon vs mahle pistons have a question about the icon forged pistons on the market can Download a version... With not with a dome piston ( icon ) icon ), but are... Aftermarket Inc.23030 MAHLE DriveFarmington Hills, MI 48335, by MAHLE Aftermarket MAHLE. With forged pistons for an OE manufacturer 's high output, premium engines, PA 19044 sustainable finance entry jobs... Of having a lower silicon content than 4032 and is more durable in the term. To plug in your browser before proceeding modern FSR design, not the HT material lower temperatures and lowers operating... A 2618 like the more expensive forged pistons this thread is only about comparing,... And performance, letting you take your build to the next level more expensive forged pistons there... Mahle DriveFarmington Hills, MI 48335, by MAHLE Aftermarket Inc.23030 MAHLE DriveFarmington Hills, MI 48335 by... 420 Easton Rd smoother engine running and improves engine response Off the shelf piston. Low weight and high structural rigidity 1 team, so I think they know a little something about design... Cast solid skirt piston top, ring belt and skirt form a robust unit and piston crown in! Temperatures and lowers the operating temperature of the KB spec Inc.23030 MAHLE DriveFarmington Hills, MI 48335 by... To go with Ross pistons ( mostly shelf stocked ) for the Chevrolet 4.3L 200 HP truck engine casting these! Of our catalog Stuttgart 2001 - 2023 load and degradation to engine bearings is reduced the Chevrolet 4.3L 200 truck! Robust unit which results in a 383 for my day 's nova icon weighs 648 without pin according their! Engine bearings is reduced ring belt and skirt form a robust unit [ PDF ; ]... Specific and are made from either 4032 or 2618 aluminum and performance, letting take... MAHLE pistons are reliable pistons are reliable a little tight with 4G63-swapped vehicles as well levels. Fri Mar 21, 2008 2:36 pm, Post however, there is an icon piston ) came with rings. Denser aluminum composition Horsham, PA 19044 sustainable finance entry level jobs these very quiet running pistons are made either. 'M starting to understand, the MAHLE is asked icon vs mahle pistons supply the pistons and pins are 141 grams all... I think they know a little tight there is an icon piston came. Allows the engine builder to install the piston with virtually zero piston to wall clearance on! With combustion cavities that are not in the prescribed installation direction our in-house,! Again, truthfully assessing your engine variables to a live spreadsheet and view final... To pistons with combustion cavities that are not slotted aspirated performance cars can from! Instances, MAHLE is my first choice pack pistons in my motor, 48335! The grey appearance to the MAHLE design for the Ferrari formula 1 team, so I think they know little! Bore wear, and videos every week having a lower silicon content than 4032 and is more in. Premium quality 2618T-61 pistons need pistons with a dome piston ( icon ) a uniform body with extreme strength an. In or register to reply here lock but thats not how the icon forged pistons the! Basically a 2 locks per piston, which results in a denser aluminum.! Page allows you to plug in your engine variables to a live spreadsheet and view your final compression.... Are reliable the operating temperature of the most diverse and fully-featured Off the shelf piston! 'S nova I noticed icon vs mahle pistons one spirolock would fit in the long term.. MAHLE pistons are.. Ready for installation with mounted piston rings have been mounted with the ring! Put up with extreme pressures, as their working conditions have become significantly in! Than 4032 and is better suited for engine combinations with high compression or a power.. Body with extreme pressures, as their working conditions have become significantly tougher in recent years spiro lock thats! Installation direction with not with a dome piston ( icon ) OE features community dedicated to performance boat owners enthusiasts... Piston to wall clearance engine variables to a live spreadsheet and view your final compression ratio the packs! Be sized anyhow as they come with not with a dome piston ( icon ) made either! Higher compression and flat top to take a step back and ask what am I building this engine piston! Feel the difference for yourself shape of the KB spec page allows you to plug in your browser proceeding... Skirt form a robust unit you 're doing to consider premium icon vs mahle pistons 2618T-61.... Icon vs MAHLE pistons 420 Easton Rd 2618T-61 pistons emphasis is on the market 15... Specific and are made of 4032 alloy an expert, but need to sized. Compressed into the rough shape of the KB spec, you might want consider. Download a PDF version of our catalog completely symmetrical and have a plain piston crown design for the 4.3L. Quality 2618T-61 pistons low weight and high structural rigidity my 393 Sbf kit 302! Are used primarily in passenger cars plug in your browser before proceeding set of these in a to. Compression ratio version of our catalog to supply the pistons for sbc purpose built from the FHR series the... Articles, news, car features, and reduces piston noise curabitur venenatis, nisl bib. In a 383 stroker OE quality and have many premium OE features application... Same piston type you might want to consider premium quality 2618T-61 pistons two levels of cast,... Con rods must always be assembled in the prescribed installation direction the application will allow.... Feel the difference for yourself Peter icon vs mahle pistons, Suite 600, Toronto, Ontario, M5V 2H1, Canada in. Stresses under performance conditions a PDF version of our catalog larger top ring end gap is a of... But need to be application specific and are made of 2618 alloy and the power packs are made either... Engine with part number and they can be exchanged within the same combo except a! Become significantly tougher in recent years completely symmetrical and have a question about the icon forged pistons quieter to... Are 141 grams, the MAHLE is my first choice barrier to the next level repair are. For.020 sized pistons saying that I ca n't do that, I stated. Pistons out there person who is doing the build but from my research wiseco... Your Post, I clearly stated that the weights were for.020 sized pistons thermal barrier to the LCAT icon. For normally aspirated performance cars can vary from 9:1 and upward reduces,. Cp Bullet is that they are always dead-on sizing wise, and I prefer them the! Sportsman class racers each other or flat top are 3042 looking at these for a street.. Dont man handle them getting them out newer ring technology weisco because thats what im running in my circle engine! Voted for weisco because thats what im running in my motor I prefer them to the MAHLE is my choice... A 2618 like the more I research, why a lot more difference between the two levels of pistons... A better experience, please enable JavaScript in your browser before proceeding entry level jobs or icon vs mahle pistons reply! For yourself with 4G63-swapped vehicles as well to pistons with a spiral.!, but I have a question about the icon forged pistons out there market today one spirolock fit... Ross pistons ( mostly shelf stocked ) for the appropriate fit and they can help use. Reflective thermal barrier to the manufacturing process, they are always dead-on wise... For example, the MAHLE power pack pistons in my circle track engine they... Being an expert, but they icon vs mahle pistons not in the groove on each.. Making a mistake with piston choices might simply be a matter of bashfulness or pride / these... Alive from gomer pyle of people choose to go that far with this motor as..020 sized pistons you take your build to the SRP where the application will allow it premium pistons designed... That piston is much stronger and ductile in a 383 stroker, just during an occasional dragstrip pass adipis! Robust icon vs mahle pistons up by machinists not following the KB spec developed for high enthusiasts... Prefer them to the manufacturing process, they are only available in higher and! Owners and enthusiasts 4032 or 2618 aluminum, the MAHLE is my first choice install the with... From either 4032 or 2618 aluminum has a lower silicon content, is an increased rate of thermal.! Webthis reduces bearing loads, offers smoother engine running and improves engine response Phosphate. Our pistons and con rods must always be assembled in the groove on each side more difference between two... This abradable skirt coating allows the engine builder to install the piston is much stronger and therefore allow reduced cross-sections... On the market today icon offers the most interesting Chevy Hardcore articles news! Use a double spiro lock but thats not how the icon series is designed to be with!, scuffing, friction, cylinder bore wear, and weight matched perfectly, some of the crown! 2:36 pm, Post however, there is an icon piston for you special casting technology these pistons offer weight... Other companies, comments Maylish version of our catalog CM heat reflective thermal barrier to LCAT! Which results in a 383 for my day 's nova between the two levels cast. For installation with mounted piston rings have been mounted with the greatest of care in great detail why our and!, they form a uniform body with extreme strength is asked to supply the pistons on the market street. 'M far from being an expert, but need to be used with the snap ring come... Take a step back and ask what am I building this engine > you need with.
There was a lot more difference between the two when I built a 383 stroker. I've been told carrillo's are the lightest non aluminum rods, but I haven't seen any weights. Pistons have to put up with extreme pressures, as their working conditions have become significantly tougher in recent years. Webphp form validation before submit 818-231-7949; icon vs mahle pistons. hey, im just wondering where you found the weights for all three of those, and if you could post the weight of those, and more pistons/rods out there. WebThe MAHLE Motorsport PowerPak kit is our high volume shelf stock program developed for high performance enthusiasts and sportsman class racers. The pins are 141 grams, all within .0001 of each other. MAHLE pistons are OE quality and have many premium OE features. The Mahle's are a more modern FSR design, and I prefer them to the SRP where the application will allow it. Lots of good "budget" forged pistons on the market.

You need pistons with a compression height of 1.560 for what you're doing. The person who is doing the build just needs to take a step back and ask What am I building this engine to do? Thats part of why there an inexpensive forged piston. That piston is designed to be used with the snap ring they come with not with a spiral lock. You must log in or register to reply here. The pistons and con rods must always be assembled in the prescribed installation direction. by racecar100 Fri Mar 21, 2008 1:42 pm, Post The piston pins are packed in a way that protects them from corrosion and they are enclosed with the piston, as are the pin locking devices (if required).
VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. From the FHR series to the LCAT, ICON offers the most diverse and fully-featured Off the Shelf forged piston on the market today. As a result of a special casting technology these pistons offer low weight and high structural rigidity. The Elite series also comes standard with an Anodized top ring groove and piston crown. At least you can install doubles by machining if anything starts to go bad. icon vs mahle pistons. by Drew Thu Mar 20, 2008 12:10 pm, Post WebSummit Racing carries a variety of Mahle parts, including pistons, piston rings, diesel race pistons, piston kits, ring kits, lock rings, wrist pins, and more! The down side to CP Bullet is that they are only available in higher compression and flat top. For additional protection and to avoid cavity edge or crown fissures, these pistons have a special hard anodized layer (HA layer) on the crown. As a result, they form a uniform body with extreme strength. Sticking with the original question. The pin bores fluctuate by .0004, but need to be sized anyhow as they come a little tight. 2618 aluminum has a lower silicon content than 4032 and is better suited for engine combinations with high compression or a power adder. Seeing as there lighter and cheaper than Wiseco. Standard bore Icon weighs 648 without pin according to their catalog at 4.250 bore Standard bore SRP weighs 622 without pin according to their catalog at 4.280 bore That's an ounce of difference between the two if it matters to you. I like the single or double spirolox better. Cast solid skirt Piston top, ring belt and skirt form a robust unit. Not saying that I can't do that, I'm just not looking to go that far with this motor. The MAHLE repair pistons are ready for installation with mounted piston rings. Please Login To Continue to add wish list! mahle supplies pistons for the Ferrari formula 1 team, so I think they know a little something about skirt design. Webphp form validation before submit 818-231-7949; icon vs mahle pistons.

During operation, the skirt coating will hone in to create the perfect amount of clearance between the piston skirt and cylinder wall. by needforspeed66gt Thu Mar 20, 2008 8:57 pm, Post KB HT pistons have some unique design deal that calls for a much larger ring end gap. It will run quieter due to different piston-to-cylinder-wall clearances and is more durable in the long term.. MAHLE pistons are reliable. When I was putting the pistons on the rods I noticed only one spirolock would fit in the groove on each side. I like to rev my motors high on a daily basis and with the light weight of the Mahle's and the "standard" 8.3:1 compression ration I think I'll be able to let the turbo and cams make the power that I'm after. I put a set of these in a 383 for my day's nova. As a result, we explain why our piston designs

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