{"id":147,"date":"2010-03-30T17:50:02","date_gmt":"2010-03-31T00:50:02","guid":{"rendered":"http:\/\/specialtyz.com\/blog\/?p=147"},"modified":"2013-09-15T15:17:40","modified_gmt":"2013-09-15T22:17:40","slug":"z34-ud-pulley-hfcs-test","status":"publish","type":"post","link":"http:\/\/blog.specialtyz.com\/?p=147","title":{"rendered":"Z34 UD Pulley & HFCs Test"},"content":{"rendered":"

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

Our customer Sean wanted to add some more mods to his Z.\u00a0 He brought it to us with Stillen Gen 3 Intakes & Stillen Catback.\u00a0 Before installing the Stillen UD Pulley & Berk HFCs we got a baseline of where the Z stood.\u00a0 Shortly thereafter we went ahead and installed the new parts.<\/p>\n

\"\"<\/a>Stock Crank Pulley<\/p>\n

\"\"<\/a>Stillen UD Pulley<\/p>\n

The Stillen pulley is lighter by almost 4 lbs.\u00a0 Factory pulley weighs in at 4.72 lbs and the Stillen piece at .99 lbs.\u00a0 Accessories get underdriven by 20%.\u00a0 The way these free HP is by removing weight, the lighter it is the easier it is for the crank to turn and by driving the accessories slower you also free power.\u00a0 Judging by the before and after its hard to tell how much difference the pulley made.\u00a0 Having not dynoed only one mod at a time we won’t know.<\/p>\n

\"\"<\/a>Stillen Catback<\/p>\n

\"\"<\/a>Berk HFCs\u00a0 (Lookout for the header to factory CAT bolts!)<\/p>\n

However its probably a safe bet to say that the HFCs made more significant changes.\u00a0 AFR dramatically changed from before and after.\u00a0 No tuning was done on our end.<\/p>\n

\"\"<\/a>It was a nice gain of 7 whp to get it over 320.\u00a0 Most HP gains were had above 4700+ RPMs and torque benefiting all the way through the curve.\u00a0 Sean’s Z is a strong performer judging by other 370s we’ve had on the dyno.\u00a0 Tuning his AFR should get him some more mid-range power.<\/p>\n","protected":false},"excerpt":{"rendered":"

Our customer Sean wanted to add some more mods to his Z.\u00a0 He brought it to us with Stillen Gen 3 Intakes & Stillen Catback.\u00a0 Before installing the Stillen UD Pulley & Berk HFCs we got a baseline of where the Z stood.\u00a0 Shortly thereafter we went ahead and installed the new parts. Stock Crank […]<\/p>\n","protected":false},"author":1,"featured_media":154,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,3,1],"tags":[],"class_list":["post-147","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-370zg37-z34-v36","category-dyno","category-general"],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/posts\/147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=147"}],"version-history":[{"count":6,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/posts\/147\/revisions"}],"predecessor-version":[{"id":2416,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/posts\/147\/revisions\/2416"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=\/wp\/v2\/media\/154"}],"wp:attachment":[{"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.specialtyz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}