{"id":73536,"date":"2020-06-19T10:18:41","date_gmt":"2020-06-19T17:18:41","guid":{"rendered":"https:\/\/www.racingjunk.com\/news\/?p=73536"},"modified":"2020-06-19T10:18:41","modified_gmt":"2020-06-19T17:18:41","slug":"head-games-inside-the-brodix-bb-3-xtra-lineup-part-4","status":"publish","type":"post","link":"https:\/\/www.racingjunk.com\/news\/head-games-inside-the-brodix-bb-3-xtra-lineup-part-4\/","title":{"rendered":"Head Games: Inside The Brodix BB-3 XTRA Lineup Part 4"},"content":{"rendered":"

\"\"<\/p>\n

Over the past three issues<\/a>, we\u2019ve dug into Brodix BB-3 XTRA heads in general and more specifically the 345 cc examples.\u00a0 If you recall, this is a high quality casting with all of the work performed in-house at Brodix (https:\/\/brodix.com<\/a>).\u00a0 Brodix rolls the head over 2-degrees, raises the exhaust port and does a considerable amount of prep to the casting, just short of fully CNC-machining it.\u00a0 Much of the technology is leading edge.\u00a0 Brodix is quick to point out that continuous research and development is a way of life at the company, and it shows in these cylinder heads.<\/p>\n

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When you purchase a set of Brodix \u201cPackage Heads\u201d, they\u2019re completely assembled with top quality race components and they\u2019re pretty much ready to go.<\/figcaption><\/figure>\n

With this issue, we\u2019ll show you, and provide info on the components Brodix uses to finish the cylinder heads. Some are proprietary.\u00a0 Some are not. Plus, Brodix uses different parts for different applications. For example, there\u2019s a different valve spring for a low lift hydraulic roller versus a big lift solid. That means a different retainer is used, a different spring locator is used and so on.\u00a0 Also keep in mind you can buy various versions of the heads bare.\u00a0 Since Brodix uses components from various manufacturers, some items may also be different if you order a set of heads.\u00a0 Let\u2019s start at the top with the valve gear on this version of the BB3 XTRA 345 package head (Brodix Easy Order Part Number 2031015):<\/p>\n

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Upstairs, these examples incorporate PAC 1.625-inch double valve springs. There\u2019s full info in the text, but these springs are setup with 810 pounds on the nose and approximately 250 pounds on the seat.<\/figcaption><\/figure>\n

As previously mentioned, in these heads the stainless steel valves have 11\/32-inch diameter stems.\u00a0 The valve springs are 1.625-inch diameter jobs from PAC, part number 1224. This is a dual spring setup with an OD of 1.175-inch on the outer.\u00a0 The inner spring has an ID of 0.851-inch.\u00a0 There is no damper. The spring has an installed height of 2.00-inch along with an open height of 1.150-inch.\u00a0 Obviously, that means it can work up to a lift of 0.850-inch.\u00a0 It has reaches coil bind at 1.100-inch and has an open load of 810 pounds.\u00a0 At installed height Brodix notes the spring has a load of 250 pounds.<\/p>\n

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It\u2019s tough to see here, but Brodix includes Manley Pro Series spring locators with the Package Head series. They\u2019re ID-style locators which, obviously locate the spring by way of an inside diameter shoulder.<\/figcaption><\/figure>\n

The springs are installed in the heads by way of a set of Manley Pro Series ID-style spring locators (part number 42437). These spring locators are designed to work with a 1.625-inch OD spring and they\u2019re manufactured from 8620 heat treated material. They have an outside diameter of 1.570-inches and the inside diameter measures 0.567-inch.\u00a0 The locator shoulder has an outside diameter of 0.850-inch and it measures 0.163-inches tall.\u00a0 Finally, the spring locators have a thickness of 0.062-inch.<\/p>\n

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On the topside, this set of cylinder heads makes use of Manley Titanium retainers. They\u2019re machined for 10-degree valve locks.<\/figcaption><\/figure>\n

In this case, the spring retainers are also from Manley (part number 23640). They\u2019re manufactured from 6AL-4V titanium. This grade of Ti is sometimes referred to as TC4 or Ti64.\u00a0 It\u2019s an alloy that possesses a high strength to weight ratio and it finds a lot of usage in the aerospace industry.\u00a0 The retainer is machined for 10-degree locks and is designed for 0.100-inch taller installed height. The OD is obviously 1.625-inch. Each retainer weighs 20-grams.<\/p>\n

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The actual locks are Comp Cam \u201cSuper Locks\u201d. In this case, the locks are 11\/32-inch jobs.<\/figcaption><\/figure>\n

As mentioned above, the locks are 10-degree steel jobs.\u00a0 In this case, the locks are sourced from Competition Cams (part number 611).\u00a0 They\u2019re designed with a lash cap recess and (obviously) fit an 11\/32″ valve stem size. As most folks know, Comp\u2019s \u201cSuper Locks\u201d have a wider angle (10\u00b0) that better distributes the valve spring loads over the retainer when compared to conventional 7\u00b0 locks.<\/p>\n

The pushrod guide plates are also sourced from Comp Cam (part number 4806).\u00a0 They\u2019re a conventional raised type but unlike OEM guide plates, these have a rounded profiles.\u00a0 In this case, the guide plates are designed for use with 3\/8-inch pushrods.\u00a0 They also accept OEM-sized 7\/16-inch rocker studs.<\/p>\n

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Pushrod guide plates are also sourced from Comp Cams. This setup is designed for use with 3\/8-inch diameter pushrods. See the text for more info.<\/figcaption><\/figure>\n

Speaking of rocker studs, Brodix has a proprietary setup they use for this (and other) big block cylinder heads. It has a base stud length of 0.750-inch while the top is 0.250-inch longer than stock. Typically, Brodix has these made by ARP, however they may use similar studs from other manufacturers from time to time.<\/p>\n

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The rocker arm studs are proprietary examples from Brodix. The base stud length is 0.750-inch while the top end is 0.250-inch longer than stock.<\/figcaption><\/figure>\n

As you can see, \u201cpackage\u201d heads from Brodix are very well equipped and clearly well thought out and well assembled.\u00a0 In terms of power production, these heads can produce big numbers, but they won\u2019t break the bank (especially when compared to fully CNC-machined jobs or hand ported examples). At the time of this writing, suggested retail for a complete package head is just over $1700 (per cylinder head).\u00a0 And if you shop, you can probably find them for even less.\u00a0 Head Games?\u00a0 The folks from Brodix are well known in the industry as straight shooters, and there\u2019s none of that with this setup.\u00a0 For a closer look, check out the accompanying photos:<\/p>\n","protected":false},"excerpt":{"rendered":"

Over the past three issues, we\u2019ve dug into Brodix BB-3 XTRA heads in general and more specifically the 345 cc examples.\u00a0<\/p>\n<\/div>","protected":false},"author":20,"featured_media":73537,"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":[5008,17,11,3470,9],"tags":[4011,5717,41,461,321],"class_list":["post-73536","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-engine","category-guest-column","category-how-tos","category-news","category-tech-tips","tag-brodix","tag-cylinder-heads","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\/06\/1-min-scaled-e1592586892968.jpg","jetpack_shortlink":"https:\/\/wp.me\/p42YSK-j84","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/73536","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=73536"}],"version-history":[{"count":1,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/73536\/revisions"}],"predecessor-version":[{"id":73545,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/73536\/revisions\/73545"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media\/73537"}],"wp:attachment":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media?parent=73536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/categories?post=73536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/tags?post=73536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}