{"id":1827,"date":"2018-07-14T01:01:21","date_gmt":"2018-07-14T05:01:21","guid":{"rendered":"http:\/\/maxtorqueperformance.com\/?p=1827"},"modified":"2018-07-14T01:05:56","modified_gmt":"2018-07-14T05:05:56","slug":"supporting-your-cylinders-open-semi-closed-or-closed-deck","status":"publish","type":"post","link":"https:\/\/maxtorqueperformance.com\/staging\/index.php\/2018\/07\/14\/supporting-your-cylinders-open-semi-closed-or-closed-deck\/","title":{"rendered":"Supporting Your Cylinders \u2013 Open, Semi-Closed, Or Closed Deck?"},"content":{"rendered":"<div>\n<header class=\"entry-header clearfix\" style=\"background-color: transparent; box-sizing: border-box; clear: none; color: #333333; display: block; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; height: 181px; letter-spacing: normal; margin-bottom: 30px; orphans: 2; padding-left: 30px; padding-right: 30px; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; visibility: visible; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\">\n<h1 class=\"entry-title\" style=\"box-sizing: border-box; color: #000000; font-family: Roboto Slab,Arial,sans-serif; font-size: 48px; font-weight: 500; line-height: 48px; text-transform: none; margin: 20px 0px 15px 0px;\">&nbsp;<\/h1>\n<div class=\"entry-meta\" style=\"box-sizing: border-box; font-size: 14px;\">\n<div class=\"avatar\" style=\"box-sizing: border-box; float: left; height: 50px; margin-right: 20px; width: 50px;\"><a class=\"author crop crop-image_290_290\" style=\"background-color: transparent; border-bottom-left-radius: 50%; border-bottom-right-radius: 50%; border-top-left-radius: 50%; border-top-right-radius: 50%; box-sizing: border-box; color: #337ab7; display: block; height: 50px; overflow: hidden; position: relative; text-decoration: none; padding: 0px 0px 50px 0px;\" href=\"https:\/\/www.enginelabs.com\/author\/kylekitchen\/\"> <img decoding=\"async\" width=\"80\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; height: 50px; object-fit: cover; vertical-align: middle; width: 50px; border: 0px none #337ab7;\" alt=\"\" src=\"https:\/\/www.enginelabs.com\/wp-content\/userphoto\/kylekitchen.thumbnail.jpg\"> <\/a><\/div>\n<p><span class=\"byline\" style=\"box-sizing: border-box; color: #a5a5a5; display: inline-block; margin-top: 15px;\"> By <span class=\"author vcard\" style=\"box-sizing: border-box;\"> <a class=\"url fn n\" style=\"background-color: transparent; box-sizing: border-box; color: #5c5c5c; font-weight: bold; text-decoration: none; text-transform: uppercase;\" href=\"https:\/\/www.enginelabs.com\/author\/kylekitchen\/\">Kyle Kitchen<\/a> <\/span> <\/span> <span class=\"posted-on\" style=\"box-sizing: border-box; color: #a5a5a5; padding-left: 0px; padding-right: 0px; text-transform: uppercase;\">July 14, 2016<\/span><\/p>\n<p>&nbsp;<\/p>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"Closed Deck Block Explained\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/r9r-OE69Ofg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/header>\n<div class=\"entry-content\" style=\"background-color: transparent; box-sizing: border-box; color: #474747; font-family: Arial,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; margin-left: 0px; margin-right: 0px; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p style=\"box-sizing: border-box; color: #474747; float: none; font-size: 16px; font-weight: 400; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 30px 175px 15px 175px;\"><a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; display: block; text-decoration: none;\" href=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-11_17-52-52.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"427\" class=\"aligncenter size-large wp-image-210746\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: inline; height: 427px; max-width: 640px; vertical-align: middle; width: 640px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-11_17-52-52-640x427.jpg\" data-lazy-loaded=\"true\"><\/a><\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">You\u2019ve more than likely heard the terms open deck, semi-closed deck (semi-open), and closed deck before. But, do you know how to identify which design your block uses or why an open-deck that&nbsp;works well for a&nbsp;naturally aspirated build won\u2019t likely last very long if it\u2019s boosted or has nitrous?&nbsp;Which design your engine&nbsp;has will play a major role in the&nbsp;maximum peak cylinder pressure your block can handle,&nbsp;which&nbsp;can be simply translated to maximum power.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">Peak cylinder pressure is much greater&nbsp;at the top the of the cylinder, where the combustion event happens. This is in addition to any&nbsp;secondary pressure&nbsp;sources the cylinder might be exposed to, such as&nbsp;forced induction, nitrous, and detonation. Naturally, this is the location that most failures happen, the more pressure you introduce into the cylinder, the more likely the cylinder wall is to bubble, crack, or fail entirely.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">The video above, posted by time attack team <a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; text-decoration: none;\" href=\"http:\/\/www.jagerracing.net\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jager Racing<\/a>&nbsp;and&nbsp;featuring&nbsp;<a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; text-decoration: none;\" href=\"http:\/\/www.outfrontmotorsports.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Outfront Motorsports<\/a>,&nbsp;presents&nbsp;the advantages of&nbsp;using a closed deck block on their time attack Subaru WRX STI. The video focuses specifically on the EJ25 motor, but the advantages can be generalized.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\"><strong style=\"box-sizing: border-box; font-weight: bold;\">Open Deck<\/strong><\/p>\n<div class=\"wp-caption aligncenter\" id=\"attachment_795590\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; margin-left: 175px; margin-right: 175px; max-width: 640px; padding-left: 0px; padding-right: 0px; width: 640px; border: 0px none #474747;\">\n<p><a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; display: block; text-decoration: none;\" href=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_22-57-19.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"320\" class=\"wp-image-210745 size-large\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: inline; height: 320px; max-width: 640px; vertical-align: middle; width: 640px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_22-57-19-640x320.jpg\" data-lazy-loaded=\"true\"><\/a><\/p>\n<p class=\"wp-caption-text\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-left-color: #ff5d1f; border-left-style: solid; border-left-width: 4px; box-sizing: border-box; color: #6a6a6a; font-size: 16px; font-weight: bold; line-height: 24px; padding-left: 15px; text-align: left; margin: 20px 0px 15px 0px;\">An open deck Ford EcoBoost 3.5L V6. Notice the lack of any type of structural support around&nbsp;the top of the cylinders (although some open deck designs utilize a&nbsp;support point at the end of each outside cylinder).<\/p>\n<\/div>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">An open deck is one of the most common designs found in lower horsepower aluminum blocks. It is the easiest to manufacture&nbsp;and provides the overall best cooling efficiency, due to the coolants&nbsp;ability to make full contact with the surface area of the upper portion of the cylinder. Some will argue that this block has the benefit of weighing less&nbsp;than its two siblings because less material is used, but this weight difference is marginal for most blocks.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">The downside to an open deck is that it&nbsp;provides the least amount of structural support at&nbsp;the top of the cylinder walls, where they need it most. This reason alone makes&nbsp;an open deck&nbsp;block the least reliable&nbsp;choice for almost any type of forced induction or nitrous application, and should be left to low compression, naturally aspirated engines and low boost platforms.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\"><strong style=\"box-sizing: border-box; font-weight: bold;\">Semi-Closed Deck<\/strong><\/p>\n<div class=\"wp-caption aligncenter\" id=\"attachment_795408\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; margin-left: 175px; margin-right: 175px; max-width: 640px; padding-left: 0px; padding-right: 0px; width: 640px; border: 0px none #474747;\">\n<p><a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; display: block; text-decoration: none;\" href=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_18-18-56.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"427\" class=\"wp-image-210744 size-large\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: inline; height: 427px; max-width: 640px; vertical-align: middle; width: 640px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_18-18-56-640x427.jpg\" data-lazy-loaded=\"true\"><\/a><\/p>\n<p class=\"wp-caption-text\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-left-color: #ff5d1f; border-left-style: solid; border-left-width: 4px; box-sizing: border-box; color: #6a6a6a; font-size: 16px; font-weight: bold; line-height: 24px; padding-left: 15px; text-align: left; margin: 20px 0px 15px 0px;\">A semi-closed deck flat-four EJ25, found in the Subaru WRX STI. Notice the bridges used to help prevent any distortion around&nbsp;the top of the cylinders.<\/p>\n<\/div>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">A semi-closed deck is the most common design found in modern factory turbocharged aluminum blocks, and is stronger than an open deck by&nbsp;adding structural&nbsp;support to the top of the cylinders at&nbsp;four&nbsp;points. Using modern casting techniques, this design can handle&nbsp;respectable boost levels into the mid&nbsp;30 PSI range and a much higher&nbsp;peak cylinder pressure than an open deck (depending on the application).<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">Because of the added material around the cylinder walls, this style is more difficult to manufacture and requires more machine work before the cylinders can be installed. Some will argue that the added support joints of a semi-closed deck reduces&nbsp;cooling efficiency and is more prone to cylinder hot spots by&nbsp;limiting the surface area for the coolant to contact.&nbsp;At higher horsepower levels, a semi-closed deck is still prone to failure at the points in between the supporting joints, especially in endurance racing or road racing applications where sustained high temperatures are common.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">The most common solution for semi-closed and open deck blocks&nbsp;is installing aftermarket sleeves&nbsp;that can support higher cylinder temps and pressure. This process is pretty expensive, but it is highly recommended that you&nbsp;find a reputable&nbsp;machine shop that has experience with your platform. Sleeving requires a lot of precise machine work to not damage the block, so only the best in your area should be trusted.<\/p>\n<section class=\"group-caption group-caption-rendered\" style=\"background-attachment: scroll; background-clip: border-box; background-color: #ffffff; background-image: none; background-origin: padding-box; background-position-x: 0%; background-position-y: 0%; background-repeat: repeat; background-size: auto; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: block; float: none; max-width: 640px; width: 640px; padding: 0px; margin: 10px 175px 10px 175px; border: 0px none #474747;\">\n<ul class=\"list-attachments thumbnails row-1 clearfix\" style=\"box-sizing: border-box; clear: none; display: block; font-size: 16px; height: 207.12px; line-height: 24px; visibility: visible; padding: 0px; margin: 0px 0px 15px 0px;\">\n<li class=\"thumbnail col-2\" style=\"background-color: #ffffff; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; border-top-left-radius: 4px; border-top-right-radius: 4px; box-sizing: border-box; clear: both; display: block; float: left; line-height: 22.85px; margin-bottom: 0px; transition-delay: 0s; transition-duration: 0.2s; transition-property: border; transition-timing-function: cubic-bezier(0.42, 0, 0.58, 1); width: 320px; padding: 0px; border: 0px none #474747;\"><a class=\"group-caption-image-box\" style=\"background-color: transparent; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; color: #ff5d1f; display: block; margin-top: 0px; padding-right: 5px; text-decoration: none; border: 0px none #ff5d1f;\" href=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-52.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\" data-image-mobile=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-52-640x427.jpg\"><img decoding=\"async\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: block; height: 207.12px; max-width: 315px; vertical-align: bottom; width: 315px; margin: 0px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-52-768x505.jpg\" data-lazy-loaded=\"true\"><\/a><\/li>\n<li class=\"thumbnail col-2\" style=\"background-color: #ffffff; border-bottom-left-radius: 4px; border-bottom-right-radius: 4px; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; border-top-left-radius: 4px; border-top-right-radius: 4px; box-sizing: border-box; display: block; float: left; line-height: 22.85px; margin-bottom: 0px; transition-delay: 0s; transition-duration: 0.2s; transition-property: border; transition-timing-function: cubic-bezier(0.42, 0, 0.58, 1); width: 320px; padding: 0px; border: 0px none #474747;\"><a class=\"group-caption-image-box\" style=\"background-color: transparent; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; color: #ff5d1f; display: block; margin-top: 0px; padding-right: 5px; text-decoration: none; border: 0px none #ff5d1f;\" href=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-55.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\" data-image-mobile=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-55-640x427.jpg\"><img decoding=\"async\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: block; height: 207.12px; max-width: 315px; vertical-align: bottom; width: 315px; margin: 0px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.enginelabs.com\/image\/2016\/07\/2016-07-11_17-52-55-768x505.jpg\" data-lazy-loaded=\"true\"><\/a><\/li>\n<\/ul>\n<p class=\"wp-caption-text\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-left-color: #ff5d1f; border-left-style: solid; border-left-width: 4px; box-sizing: border-box; color: #6a6a6a; font-size: 16px; font-weight: bold; line-height: 24px; text-align: left; padding: 10px 10px 10px 15px; margin: 20px 0px 15px 0px;\">Left: A factory 3.5-liter EcoBoost engine prior to being machined for aftermarket sleeves. Right: A sleeved 3.5-liter EcoBoost engine.<\/p>\n<\/section>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\"><strong style=\"box-sizing: border-box; font-weight: bold;\">Closed Deck<\/strong><\/p>\n<div class=\"wp-caption aligncenter\" id=\"attachment_795407\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; margin-left: 175px; margin-right: 175px; max-width: 640px; padding-left: 0px; padding-right: 0px; width: 640px; border: 0px none #474747;\">\n<p><a style=\"background-color: transparent; box-sizing: border-box; color: #ff5d1f; display: block; text-decoration: none;\" href=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_18-18-53.jpg\" rel=\"shadowbox[sbpost-176819];player=img;\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"427\" class=\"wp-image-210743 size-large\" style=\"border-image-outset: 0; border-image-repeat: stretch; border-image-slice: 100%; border-image-source: none; border-image-width: 1; box-sizing: border-box; display: inline; height: 427px; max-width: 640px; vertical-align: middle; width: 640px; border: 0px none #ff5d1f;\" alt=\"\" src=\"https:\/\/www.speednik.com\/files\/2016\/07\/2016-07-08_18-18-53-640x427.jpg\" data-lazy-loaded=\"true\"><\/a><\/p>\n<p class=\"wp-caption-text\" style=\"background-attachment: scroll; background-clip: border-box; background-color: transparent; background-image: none; background-origin: padding-box; background-position-x: 0px; background-position-y: 0px; background-repeat: repeat; background-size: auto; border-left-color: #ff5d1f; border-left-style: solid; border-left-width: 4px; box-sizing: border-box; color: #6a6a6a; font-size: 16px; font-weight: bold; line-height: 24px; padding-left: 15px; text-align: left; margin: 20px 0px 15px 0px;\">A modified closed deck flat-four EJ25, found in the Subaru WRX STI. Notice the lack of any open space around the water jackets (only coolant ports), providing full support around&nbsp;the top of the cylinder walls.<\/p>\n<\/div>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">A closed deck design is generally left to iron blocks and aluminum racing engines. It is&nbsp;the perfect design for fully built, high compression, high revving race engines that require the highest level of structural support available. Common on high level drag race motors, this design is also able to&nbsp;withstand&nbsp;prolonged periods of high heat and cylinder pressure commonly seen in endurance racing and road racing.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">A&nbsp;closed deck block&nbsp;is much more expensive and requires an entirely different casting procedure if done from the manufacturer, but can also be modified using pieces that are press fit into position&nbsp;around the water jackets. The latter process requires a custom head gasket, along with precise calculations and machine work to verify that the pieces fit properly and that the water ports are drilled properly to provide adequate flow to efficiently cool the heads.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">Many will also note that a closed deck block provides the least amount of cooling capability out of the three. Although this is true to an extent, many of todays closed deck blocks have been put through extensive testing&nbsp;and are designed to guarantee&nbsp;efficient cooling.<\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\"><strong style=\"box-sizing: border-box; font-weight: bold;\">Conclusion<\/strong><\/p>\n<p style=\"box-sizing: border-box; line-height: 24px; max-width: 990px; width: 640px; padding: 0px; margin: 0px 175px 15px 175px;\">Depending on the goals for your build, you may need to sleeve your block or upgrade to a closed deck design. Most modern semi-closed deck blocks can handle very respectable power levels before needing to be sleeved or upgraded, and open deck blocks can handle just about anything you throw at it in naturally aspirated form. But, if you are building a race engine and want the ultimate reliability out of your block, your best option is a closed deck design or aftermarket sleeves (depending on the application a<span style=\"display: inline !important; float: none; background-color: transparent; color: #474747; font-family: Arial,sans-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\">nd your budget).<\/span><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; By Kyle Kitchen July 14, 2016 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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