{"id":22,"date":"2010-04-03T19:07:46","date_gmt":"2010-04-04T01:07:46","guid":{"rendered":"http:\/\/variedindustry.com\/blog\/?p=22"},"modified":"2010-04-03T19:07:57","modified_gmt":"2010-04-04T01:07:57","slug":"bearing-clearances-and-dry-sumps","status":"publish","type":"post","link":"https:\/\/variedindustry.com\/blog\/2010\/04\/bearing-clearances-and-dry-sumps\/","title":{"rendered":"Bearing Clearances and Dry Sumps"},"content":{"rendered":"<div id=\"_mcePaste\">\n<div id=\"_mcePaste\">We have built a race engine. It&#8217;s a 2jz-gte supra 3 liters engine and we have applied a dry sump kit.<\/div>\n<div id=\"_mcePaste\">We are actually using a peterson gerotor 3 stages pump rated at 18\/20gpm (at how many rpms?)<\/div>\n<div id=\"_mcePaste\">We have a 5 gal tank in the trunk and a -16an line going to the pump and -12an line pumping oil inside the engine.<\/div>\n<div id=\"_mcePaste\">2 scavenging lines keeps the tank always at at least 2\/3 of the level.<\/div>\n<div id=\"_mcePaste\">Here is the problem:<\/div>\n<div id=\"_mcePaste\">hot oil, idle 1600rpms, 28psi of oil pressure.<\/div>\n<div id=\"_mcePaste\">everything is ok so far.<\/div>\n<div id=\"_mcePaste\">Increasing the engine rpms we see an incease in flow and pressure. We are actually using evne a flow meter gauge.<\/div>\n<div id=\"_mcePaste\">Everything is ok up to about 6k rpms engine speed where we have about 117psi of pressure and 16gpm of oil flow.<\/div>\n<div id=\"_mcePaste\">At this point we have problems:<\/div>\n<div id=\"_mcePaste\">keeping the engine STEADY at 6k rpms we start to see a drop of oil pressure BUT NOT a drop in flow and this could be caused MAYBE by the increasing of oil temperature and loss of oil viscosity.<\/div>\n<div id=\"_mcePaste\">If we increase the engine rpms we have an even more accentuated loss of oil pressure but still absolutely no loss of oil flow.<\/div>\n<div id=\"_mcePaste\"><a href=\"http:\/\/www.eng-tips.com\/viewthread.cfm?qid=168520&amp;page=3\" target=\"_blank\">http:\/\/www.eng-tips.com\/viewthread.cfm?qid=168520&amp;page=3<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Looking into thoughts on bearing clearances and dry sump systems I found this interesting thread at this site:<br \/>\nhttp:\/\/www.eng-tips.com\/viewthread.cfm?qid=168520&#038;page=3<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-22","post","type-post","status-publish","format-standard","hentry","category-t-sql"],"_links":{"self":[{"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/posts\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/comments?post=22"}],"version-history":[{"count":3,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/posts\/22\/revisions"}],"predecessor-version":[{"id":25,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/posts\/22\/revisions\/25"}],"wp:attachment":[{"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/media?parent=22"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/categories?post=22"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/variedindustry.com\/blog\/wp-json\/wp\/v2\/tags?post=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}