{"id":5652,"date":"2014-05-15T15:34:30","date_gmt":"2014-05-15T22:34:30","guid":{"rendered":"http:\/\/www.racingjunk.com\/news\/?p=5652"},"modified":"2016-11-30T12:03:21","modified_gmt":"2016-11-30T20:03:21","slug":"three-pedals-on-the-floor-different-strokes-for-different-folks-part-ii","status":"publish","type":"post","link":"https:\/\/www.racingjunk.com\/news\/three-pedals-on-the-floor-different-strokes-for-different-folks-part-ii\/","title":{"rendered":"Three Pedals on the Floor: Different Strokes for Different Folks, Part II"},"content":{"rendered":"

\"Clutch<\/a><\/p>\n

In the first part of this series (SEE HERE<\/a>), we began our investigation into two very different types of high performance clutches. \u00a0\u00a0The first (which we\u2019re looking at here) is a single disc affair.\u00a0 But it has some twists.\u00a0 Instead of using a common diaphragm or Borg & Beck pressure plate, the McLeod setup we focused in on is a combination Long\/Borg & Beck arrangement.\u00a0 It\u2019s not new technology (McLeod pioneered this setup decades ago), but it still works very well, thank you.\u00a0 What you end up with in this curious mix of parts is the heavy-duty hat found in a Borg & Beck pressure plate, but with Ford style Long levers in place.\u00a0 More on this arrangement in the accompanying photos.<\/p>\n

Backing up the package is a steel flywheel. It\u2019s SFI approved. That means the piece passed a stringent rotational test (without disintegration or ever stress cracks).\u00a0 The last thing you need is floor and limb removal courtesy of a departing flywheel.\u00a0 And don\u2019t laugh \u2013 it\u2019s an ugly picture and it can happen all too quickly.\u00a0 That\u2019s why high quality clutch components with SFI tags are extremely important.<\/p>\n

The flywheel we showed you was a pretty light steel job at 25 pounds.\u00a0 You can get flywheels in plenty of different weights (typically 25, 30 and 40 pounds).\u00a0 The reason for having different weight options is due to the engine characteristics coupled with the vehicle weight.\u00a0 Honestly, a little 283 is going to need a bit more flywheel weight to move a heavy car than say a 427 in a something light like a Corvette.<\/p>\n

So far so good.\u00a0 What follows is a more in-depth look at the pressure plate levers along with a look at how clutch disc technology has progressed.\u00a0 Bottom line here is, this \u201cain\u2019t the Sixties\u201d anymore. It is possible to mix old school proven parts with next technology.<\/p>\n

\"Clutch<\/a>
The Ford Long style levers found on this McLeod pressure plate offer some big advantages over a standard Borg & Beck lever. The biggest is the fact they have quick ratios, and prove perfect for quick shifting. Equally important, the setup is extremely accurate and it just flat works on the street (and of course, the strip).<\/figcaption><\/figure>\n

 <\/p>\n

\"Here\u2019s<\/a>
Here\u2019s where modern technology meets old school: The \u201crag\u201d or disc looks pretty conventional in the first photo \u2013 on the pressure plate side, it features an organic bonded, riveted face and sprung hub. Flip it over to the flywheel side and you\u2019ll find the disc has a ceramic (segmented) puck bonded to the face.<\/figcaption><\/figure>\n

 <\/p>\n

\"What<\/a>
What the multiple friction materials accomplish is to increase clamping power but at the same time, make the disc very \u201clivable\u201d on the street. It\u2019s like having your cake and eating it too.<\/figcaption><\/figure>\n

 <\/p>\n

\"McLeod<\/a>
McLeod encapsulates three of the springs in the hub. They use a urethane material, which provides a dampening effect. This tends to reduce chatter in a sprung hub clutch disc. Basically, consider the urethane as a shock absorber for the sprung hub.<\/figcaption><\/figure>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

In Part III, we\u2019ll dig deep into dual-purpose multi-disc clutches.<\/p>\n","protected":false},"excerpt":{"rendered":"

In the first part of this series (SEE HERE), we began our investigation into two very different types of high performance clutches. \u00a0\u00a0The first (which […]<\/a><\/p>\n<\/div>","protected":false},"author":20,"featured_media":5657,"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":[3465,11,9,5012],"tags":[858,825,827,669,826,859,828,321],"class_list":["post-5652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-drag-racing","category-how-tos","category-tech-tips","category-transmission-clutch","tag-clutch","tag-clutch-package","tag-flywheel","tag-mcleod-racing","tag-pressure-plate","tag-pressure-plate-levers","tag-single-disc-clutch","tag-wayne-scraba"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.racingjunk.com\/news\/wp-content\/uploads\/2014\/05\/Clutch-9Feature.jpg","jetpack_shortlink":"https:\/\/wp.me\/p42YSK-1ta","jetpack_sharing_enabled":true,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/5652","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=5652"}],"version-history":[{"count":3,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/5652\/revisions"}],"predecessor-version":[{"id":33230,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/posts\/5652\/revisions\/33230"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media\/5657"}],"wp:attachment":[{"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/media?parent=5652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/categories?post=5652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.racingjunk.com\/news\/wp-json\/wp\/v2\/tags?post=5652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}