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<blockquote data-quote="swampratt" data-source="post: 3221104" data-attributes="member: 15054"><p>Some flow numbers on those Edelbrock heads.</p><p>As advertised flow numbers off their sight state flow numbers as being the same for the part number #5089 and # 5073.</p><p>I find that a bit odd one has 64cc chambers #5089 and the other #5073 has 70cc chambers.</p><p></p><p></p><p>So as advertised by Edelbrock. 1020 flow bench. I had these flowed 4-1-2019 today on the SF600. The first set of numbers are from Edelbrock.</p><p>The other 2 sets are the SF600 bench.</p><p>Intake ......Exhaust. SF600 Stock In' .......Ex' ........ Blended ported IN'.........EX</p><p>.100" 63....... 51............................58.15........55.27.......................58.30.......44.00.</p><p>.200" 125.....99...........................121.5...........100.48..................123.00.....93.41.</p><p>.300" 182...131...........................178.2............135.02.................179.68.....136.9.</p><p>.400" 225....153............................222.15.........161.67.................226.9.......171.18.</p><p>.500" 248.....163...........................250.66..........171.18................256.01.....187.03.</p><p>.600" 249......168..........................255.42..........175.93.......550"...261.36....196.54.</p><p>.700"....NONE stated..................... 254.23...650" 179.10 ..............264.33.....198.12</p><p>.800"......NONE...............................................................................................199.71</p><p></p><p>No more flow gain at .600" on the exhaust on ported but gained at 700".</p><p>No more flow on stock exhaust port past .650".</p><p></p><p>Now I did raise the exhaust port and I did NOT touch the valve job and I did not touch the chambers at all.</p><p>I opened the exhaust throat and hard seat a little. it is only .015" larger than stock.</p><p>To make it .88% of valve diameter and Intake was already .89%.</p><p></p><p>Now these heads have a very odd shape at the pushrod pinch on 2 of the runners on each head.</p><p>Kind of triangular.. a quick turn into the rest of the runner and bowl.</p><p>the other 2 runners are more traditional and not so triangular shaped.. but still a bit of a peak.</p><p></p><p>It is not really bad but just not what you expect.</p><p></p><p>Some numbers to chew on at least.</p><p>These are brand new never ran date on box is 10/03/2018 .</p><p></p><p>NO PIPE on the exhaust port during the flow tests.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3221104, member: 15054"] Some flow numbers on those Edelbrock heads. As advertised flow numbers off their sight state flow numbers as being the same for the part number #5089 and # 5073. I find that a bit odd one has 64cc chambers #5089 and the other #5073 has 70cc chambers. So as advertised by Edelbrock. 1020 flow bench. I had these flowed 4-1-2019 today on the SF600. The first set of numbers are from Edelbrock. The other 2 sets are the SF600 bench. Intake ......Exhaust. SF600 Stock In' .......Ex' ........ Blended ported IN'.........EX .100" 63....... 51............................58.15........55.27.......................58.30.......44.00. .200" 125.....99...........................121.5...........100.48..................123.00.....93.41. .300" 182...131...........................178.2............135.02.................179.68.....136.9. .400" 225....153............................222.15.........161.67.................226.9.......171.18. .500" 248.....163...........................250.66..........171.18................256.01.....187.03. .600" 249......168..........................255.42..........175.93.......550"...261.36....196.54. .700"....NONE stated..................... 254.23...650" 179.10 ..............264.33.....198.12 .800"......NONE...............................................................................................199.71 No more flow gain at .600" on the exhaust on ported but gained at 700". No more flow on stock exhaust port past .650". Now I did raise the exhaust port and I did NOT touch the valve job and I did not touch the chambers at all. I opened the exhaust throat and hard seat a little. it is only .015" larger than stock. To make it .88% of valve diameter and Intake was already .89%. Now these heads have a very odd shape at the pushrod pinch on 2 of the runners on each head. Kind of triangular.. a quick turn into the rest of the runner and bowl. the other 2 runners are more traditional and not so triangular shaped.. but still a bit of a peak. It is not really bad but just not what you expect. Some numbers to chew on at least. These are brand new never ran date on box is 10/03/2018 . NO PIPE on the exhaust port during the flow tests. [/QUOTE]
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