{"id":81516,"date":"2021-10-01T08:32:33","date_gmt":"2021-10-01T15:32:33","guid":{"rendered":"https:\/\/www.racingjunk.com\/news\/?p=81516"},"modified":"2022-01-25T12:59:08","modified_gmt":"2022-01-25T20:59:08","slug":"the-foundation-of-your-engine-from-borowski-race-engines-part-ii","status":"publish","type":"post","link":"https:\/\/www.racingjunk.com\/news\/the-foundation-of-your-engine-from-borowski-race-engines-part-ii\/","title":{"rendered":"The Foundation Of Your Engine From Borowski Race Engines Part II"},"content":{"rendered":"<p class=\"jetpack-slideshow-noscript robots-nocontent\">This slideshow requires JavaScript.<\/p><div id=\"gallery-81516-1-slideshow\" class=\"jetpack-slideshow-window jetpack-slideshow jetpack-slideshow-black\" data-trans=\"fade\" data-autostart=\"1\" data-gallery=\"[{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/1-min-scaled-1.jpg&quot;,&quot;id&quot;:&quot;83587&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part 2&quot;,&quot;alt&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part 2&quot;,&quot;caption&quot;:&quot;In Part One of this \\u201cBuilding Blocks\\u201d series, we told you about the trouble (at least in this space in time), the writer had locating something as common as a big block Chevy cylinder block.  That\\u2019s where Borowski Race Engines entered into the equation.  We also briefly mentioned the CNC engine machining capabilities the Borowski folks have.   They\\u2019re rather extensive, but we\\u2019ll get into that later. \\n\\nBefore venturing any further, let\\u2019s stop and back up a bit. If, for example, I had decided to buy the block unfinished and machine it locally, here\\u2019s some of the things I\\u2019d need to get done \\u2013 much of it with specialized fixturing:\\n\\nThe block would first have to be visually inspected for flaws and then deburred by hand.  This obviously takes care of removing casting flash and sharp edges on the block.  Since it\\u2019s a new block, there\\u2019s little need to dry Magnaflux inspect it for cracks, nor is there a pressing need to sonic test the block.  \\n\\nAt this point, the back of the block would be trued (or at the least, checked to ensure it\\u2019s true). This step can often have the location of the bellhousing dowels verified and trued if necessary.  \\n\\nNext up, the main bearing bores would be checked for alignment and size.  This is critical since many of the machining operations index directly (or indirectly) off the centerline of the crankshaft. If necessary, the block would have to either be line bored or line honed, depending upon the preference and\\\/or the machine shop capabilities.  \\n\\nFrom here, the decks can be machined. Typically, they would be square decked. Square decking ensures each deck has a true 45-degree angle machined on each side of the centerline (for a total of 90-degrees). This also ensures the block decks are square to the centerline of the main bearing bore.  Here, if you measure from the centerline of the main bearing bore to the deck it must be the same at the front and rear of each cylinder bank. Basically, you\\u2019re checking and correcting it from side to side and front to back.  \\n\\nBut that\\u2019s not all when it comes to the decks. They must be machined to establish the deck height. This is obviously a calculated dimension that takes into account the crankshaft throw (1\\\/2 the stroke), the center to center distance measurement of the connecting rod, the compression height of the piston, piston to deck clearance and quench into account.  Once machined, the finish surface finish of the deck must be taken into account.  The type of head gasket you select has an effect upon deck surface finish.\\n\\nOnce the deck is complete, the block can be bored.  In some cases, the machine shop will use a block mounted boring bar.  In others, the boring bar supports the engine by way of the main saddles.  Once bored, a crank would have to be installed and clearance for the counterweights at the bottom of the cylinder bores would need checking. If there wasn\\u2019t room, the block would require grinding. \\n\\nIn my case, the bore was rough bored, but required honing. With honing, it would need torque plates. It could either honed semi-automatically or by hand. \\n\\nNext up, for my application, the lifter bores would need attention. The reason is I\\u2019m using a .905-inch diameter Jesel lifter. The stock BBC lifter bore is designed for .842-inch diameter lifters. Again, this job would require a specialized, rather complex piece of tooling.\\n\\nThreads in the block would still have to be chased. In some spots, a chamfer would be required on thread bores. \\n\\nWith all of those machining tasks accomplished, I\\u2019d have to clean the block, get the cam bearings installed, install the freeze plugs, install the gallery plugs and paint the block (more on this later).\\n\\nAs you can see, it\\u2019s an extensive list.  But what does Borowski Racing\\u2019s Rottler block machining center do?  The truth is, it can do pretty much every machining operation listed, aside from chasing threads, cleaning the block, installing freeze plugs and so on.  One thing you should know is the 4-axis CNC setup is also very capable of providing accuracy in the range of 0.0002\\u0026#8243; and one thousandth of a degree! It is also other capabilities, including precisely probing the cylinder block. Check this link courtesy of Borowski Racing \\u2013 it shows how the measuring system works:\\n\\nInstagram time-lapse video of a probe cycle\\n\\nThat\\u2019s a wrap for this issue. Next time around, we\\u2019ll dig deeper into the block machining process. Ken McCaul will provide considerable insight into CNC honing along with checking cylinder wall finish. You should find it rather interesting. While you\\u2019re waiting for Part 3, check out the accompanying photos:\\n\\n\\n\\nSource \\u2013 Building Blocks:\\n\\nBorowski Race Engines, Inc.\\n1545 Mound Rd,\\nRockdale IL, 60436\\nPhone: (815) 725-2727\\nWebsite:  https:\\\/\\\/borowskirace.com)\\n\\n\\nClick Here to Begin Slideshow&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/6-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81528&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 2&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;Here\\u2019s how the block arrived, right out of the box.  Borowski cleans and details the block and also paints it.  My Shilo Shepherd friend doesn\\u2019t seem to care one way or another (!).&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/7-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81529&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 3&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;This is another look from the bottom end.  Once in my hands, I removed the main caps along with all of the gallery plugs and rewashed it with hot, soapy water (Dawn dish detergent). This was simply a matter of being sure it was clean.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/8-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81530&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 4&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;Along with paint, Borowski installs brass frost plugs.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/9-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81531&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 5&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;Cylinder head dowels are also installed in the decks.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/10-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81532&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 6&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;Ditto with the bellhousing dowel pins.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/11-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81533&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 7&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;The block was deburred before I received it.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/12-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81534&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 8&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;The lifter bores were also machined to accept my .905-inch body Jesel rollers.&quot;,&quot;itemprop&quot;:&quot;image&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/www.racingjunk.com\\\/news\\\/wp-content\\\/uploads\\\/2021\\\/10\\\/13-min-scaled.jpg&quot;,&quot;id&quot;:&quot;81535&quot;,&quot;title&quot;:&quot;The Foundation Of Your Engine From Borowski Race Engines Part II Slide 9&quot;,&quot;alt&quot;:&quot;&quot;,&quot;caption&quot;:&quot;The Dart blocks are \\u201cclearanced\\u201d so that the lifters can actually be installed.&quot;,&quot;itemprop&quot;:&quot;image&quot;}]\" itemscope itemtype=\"https:\/\/schema.org\/ImageGallery\"><\/div>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>In Part One of this \u201cBuilding Blocks\u201d series, we told you about the trouble (at least in this space in time), the writer had locating something as common as a big block Chevy cylinder block.  That\u2019s where Borowski Race Engines<entered into the equation. In Part II, we dive further into prepping the block.\n<\/p>\n<\/div>","protected":false},"author":20,"featured_media":81530,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5008,11,3470,4879],"tags":[6537,281,7521,6542,5150,321],"class_list":["post-81516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-engine","category-how-tos","category-news","category-slideshow","tag-borowski-race-engines","tag-how-to","tag-part-2","tag-race-engines","tag-slideshows","tag-wayne-scraba"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2021\/10\/8-min-scaled.jpg","jetpack_shortlink":"https:\/\/wp.me\/p42YSK-lcM","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/81516","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/comments?post=81516"}],"version-history":[{"count":3,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/81516\/revisions"}],"predecessor-version":[{"id":83589,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/81516\/revisions\/83589"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media\/81530"}],"wp:attachment":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media?parent=81516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/categories?post=81516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/tags?post=81516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}