{"id":72854,"date":"2020-05-29T08:17:50","date_gmt":"2020-05-29T15:17:50","guid":{"rendered":"https:\/\/www.racingjunk.com\/news\/?p=72854"},"modified":"2020-05-29T08:17:50","modified_gmt":"2020-05-29T15:17:50","slug":"head-games-inside-the-brodix-bb-3-xtra-lineup-part-3","status":"publish","type":"post","link":"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/","title":{"rendered":"Head Games: Inside The Brodix BB-3 XTRA Lineup Part 3"},"content":{"rendered":"<p><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72487\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-2\/1-min-68\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167.jpg\" data-orig-size=\"639,398\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Headers Lead\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167-300x187.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-1024x683.jpg\" class=\"aligncenter wp-image-72487 size-full\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167.jpg\" alt=\"Brodix Headers Lead\" width=\"639\" height=\"398\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167.jpg 639w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167-300x187.jpg 300w\" sizes=\"auto, (max-width: 639px) 100vw, 639px\" \/><\/a><\/p>\n<p>If you\u2019ve been following this series, you\u2019ll know we\u2019ve been taking a detailed look at <a href=\"https:\/\/brodix.com\" target=\"_blank\" rel=\"noopener noreferrer\">Brodix BB3 XTRA cylinder heads<\/a>.<\/p>\n<p>Need to catch up?<\/p>\n<p><a href=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">Head Games: Inside The Brodix BB-3 XTRA Lineup Part 1<\/a><\/p>\n<p><a href=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Head Games: Inside The Brodix BB-3 XTRA Lineup Part 2<\/a><\/p>\n<p>We looked at intake and exhaust port layout and flow, valve dimensions, rocker arm, stud girdle, and guide plate compatibility, the need for a raised rocker rail and more. But before we go any further, we should take a short look at Brodix\u2019 casting operations. As we mentioned previously, there\u2019s much more technology here than first meets the eye.<\/p>\n<p>When Brodix started it was a jobbing foundry that manufactured all types of quality aluminum castings. According to Brodix: \u201cVery high strength alloys were the specialty of Francis Dix, the \u201cDix\u201d in Brodix. His family had a long history in the foundry industry. Along came J.V. Brotherton the \u201cBro\u201d in Brodix and married Paula, the daughter of Francis and Dorothy Dix. J.V.\u2019s hobby was racing automobiles.<br \/>\n\u201cJ.V. had a fascination with cylinder heads that ultimately led to the production of an aluminum Hemi head in 1971. Mopar reintroduced their aluminum Hemi head in 1972 and gave them to their racers. Needless to say, this was not a good thing for aftermarket Hemi sales. Regrouping, a small block Chevy head was made in 1973 and the rest has been history. The ability to make close tolerance, high strength castings has been the benchmark of Brodix.\u201d<\/p>\n<p>Roughly 55 years ago, the operation consisted of an old Induma mill, a Russian roughing mill, and an old radial drill. Today, the place bristles with dozens of CNC machining center and a number of other pieces of CNC equipment. The operation has a state-of-the art, in-house house dyno, a wet flow bench and of course, they still have their own foundry (as most know, not all cylinder head manufacturers perform their own casting).<\/p>\n<p>With that in mind, Brodix has a couple of videos (sans commentary) you\u2019ll probably find rather interesting. The first shows how they cast a big block Chevy cylinder head in their foundry:<\/p>\n<p><iframe loading=\"lazy\" title=\"BRODIX\u00ae Foundry Process\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/7IhTho9MLH4?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><\/p>\n<p>The next link shows how a big block Brodix head goes from casting to completion. You might also find it noteworthy (I did):<\/p>\n<p><iframe loading=\"lazy\" title=\"BRODIX\u00ae Cylinder Head Total Manufacturing Process\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/sot4unJ4lFQ?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><\/p>\n<p>Fair enough. We discussed flow in the last issue, but what about the porting \u201cmechanics\u201d found in the BB3 XTRA 345 heads? In both the intake and exhaust ports, the heads are partially CNC-machined. Essentially, the intake port is gasket matched while the bowls are blended. Matching the intake port to the gasket provides a good transition between the cylinder head and the intake manifold. A step or overlap here creates turbulence and obviously creates a flow restriction. Brodix points out that the most critical location for port matching is actually the top of the intake port. The reason being, this is where the port velocity is high and where you\u2019ll see the highest intake flow volume.<\/p>\n<p>That\u2019s not the end of it either: In most heads, the bowls are bored by way of a mill. Because of this, there\u2019s almost always a sharp transition to the port. That in turn creates turbulence and restricts port flow. Blending the bowls obviously takes care of the transition.<\/p>\n<p>It\u2019s pretty common for head porters to narrow and streamline the valve guide bosses within the bowl. Given the casting technology Brodix has, the bosses already have a very nice streamline shape.<\/p>\n<p>On our subject cylinder heads, the valve face measures 2.30-inches on the intake side and 1.88-inches on the exhaust. Both intake and exhaust valves are stainless steel in this set of heads. Brodix (obviously) uses a bronze guide setup in heads and for this application, they use a positive stop, 0.529-inch Neoprene-Teflon valve stem seal on the intake side. Typically, no seal is used on the exhaust side, simply because it runs sufficiently hot to burn off any oil. In all engines, valve guides typically wear faster on the exhaust side too. This is also due to the added heat from the exhaust. Brodix advises that the majority of valve guide wear issues are caused by initial prep coupled with engine warm-up. Essentially, bronze guides cannot run dry for any length of time.<\/p>\n<p>The valve seats installed on the BB3XTRA 345 heads are ductile iron. The intake seat measures 2.460-inches on the OD X 0.375-inches deep. Meanwhile, the exhaust seat measures 1.960-inches on the OD and it too is 0.375-inches deep. When it comes to the valve job for this application, Brodix incorporates a radius seat configuration. Basically, Brodix begins with a 45-degree cut, a 38-degree cut along with a tangent and then blends it. What this means is the break lines on the seats are carefully blended away to craft the smoothest possible transition.<\/p>\n<p>We\u2019ll end it right for this issue. Next time around, we\u2019ll complete our look at the assembled \u201cBig Brodie\u201d \u2013 aka the BB3XTRA 345 cylinder head. In the meantime, check out the accompanying photos:<\/p>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72855\" aria-describedby=\"caption-attachment-72855\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72855\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/13-min-10\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Headers 13\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;When you take a close look at the intake side of the BB-3 XTRA 345 you can see it\u2019s been port matched to an intake gasket. The text offers full details, but briefly, removing a step in material here eliminates turbulence and improves flow.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-1024x683.jpg\" class=\"size-large wp-image-72855\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-1024x683.jpg\" alt=\"Brodix Headers 13\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/13-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72855\" class=\"wp-caption-text\">When you take a close look at the intake side of the BB-3 XTRA 345 you can see it\u2019s been port matched to an intake gasket. The text offers full details, but briefly, removing a step in material here eliminates turbulence and improves flow.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72856\" aria-describedby=\"caption-attachment-72856\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72856\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/14-min-8\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Header 14\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;The top portion of the intake port is the most important when it comes to flow.  That\u2019s typically where the charge velocity is highest.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-1024x683.jpg\" class=\"size-large wp-image-72856\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-1024x683.jpg\" alt=\"Brodix Header 14\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/14-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72856\" class=\"wp-caption-text\">The top portion of the intake port is the most important when it comes to flow. That\u2019s typically where the charge velocity is highest.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72857\" aria-describedby=\"caption-attachment-72857\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72857\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/15-min-8\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Header 15\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;The bowls are also blended on the BB-3 XTRA 345. The way heads are initially machined, there\u2019s almost always a sharp transition to the port.  Bowl blending fixes it.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-1024x683.jpg\" class=\"size-large wp-image-72857\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-1024x683.jpg\" alt=\"Brodix Header 15\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/15-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72857\" class=\"wp-caption-text\">The bowls are also blended on the BB-3 XTRA 345. The way heads are initially machined, there\u2019s almost always a sharp transition to the port. Bowl blending fixes it.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72858\" aria-describedby=\"caption-attachment-72858\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72858\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/16-min-8\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Header 16\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Look closely at the valve guide boss.  In a fully ported cylinder head, most will have a narrowed and streamlined boss.  With their outstanding casting technology, Brodix can offer a very nice streamlined boss right out of the box.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-1024x683.jpg\" class=\"size-large wp-image-72858\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-1024x683.jpg\" alt=\"Brodix Header 16\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/16-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72858\" class=\"wp-caption-text\">Look closely at the valve guide boss. In a fully ported cylinder head, most will have a narrowed and streamlined boss. With their outstanding casting technology, Brodix can offer a very nice streamlined boss right out of the box.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72859\" aria-describedby=\"caption-attachment-72859\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72859\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/17-min-7\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Header 17\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;As you can see, Brodix incorporates a bronze guide setup in the heads and for this application, they use a positive stop, 0.529-inch Neoprene-Teflon valve stem seal on the intake side.  No seal is used on the exhaust side, simply because it runs hot enough to burn off any oil.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-1024x683.jpg\" class=\"size-large wp-image-72859\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-1024x683.jpg\" alt=\"Brodix Header 17\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/17-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72859\" class=\"wp-caption-text\">As you can see, Brodix incorporates a bronze guide setup in the heads and for this application, they use a positive stop, 0.529-inch Neoprene-Teflon valve stem seal on the intake side. No seal is used on the exhaust side, simply because it runs hot enough to burn off any oil.<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_72860\" aria-describedby=\"caption-attachment-72860\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"72860\" data-permalink=\"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-3\/18-min-6\/\" data-orig-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-scaled.jpg\" data-orig-size=\"2560,1707\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Brodix Header 18\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;While you can\u2019t see the seats in this completed head, Brodix makes use of ductile iron seats.  A radius seat valve job is performed on this particular set of heads. See the text for more info.&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-300x200.jpg\" data-large-file=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-1024x683.jpg\" class=\"size-large wp-image-72860\" src=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-1024x683.jpg\" alt=\"Brodix Header 18\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-1024x683.jpg 1024w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-300x200.jpg 300w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-768x512.jpg 768w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-1536x1024.jpg 1536w, https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/18-min-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-72860\" class=\"wp-caption-text\">While you can\u2019t see the seats in this completed head, Brodix makes use of ductile iron seats. A radius seat valve job is performed on this particular set of heads.\u00a0<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>Inside The Brodix BB-3 XTRA Lineup part 3 with Wayne Scraba. <\/p>\n<\/div>","protected":false},"author":20,"featured_media":72487,"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":[5028,5008,17,11,3470],"tags":[4011,5717,1856,218,281,41,461,321],"class_list":["post-72854","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fuel-delivery","category-engine","category-guest-column","category-how-tos","category-news","tag-brodix","tag-cylinder-heads","tag-engine","tag-guest-columns","tag-how-to","tag-news","tag-tech-tips-2","tag-wayne-scraba"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2020\/05\/1-min-1-scaled-e1589483771167.jpg","jetpack_shortlink":"https:\/\/wp.me\/p42YSK-iX4","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/72854","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=72854"}],"version-history":[{"count":1,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/72854\/revisions"}],"predecessor-version":[{"id":72862,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/72854\/revisions\/72862"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media\/72487"}],"wp:attachment":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media?parent=72854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/categories?post=72854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/tags?post=72854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}