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New Edge Cobras
The IRS Tech Article
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<blockquote data-quote="Stitch" data-source="post: 3028422" data-attributes="member: 4872"><p>That was a two part sentence. And yes, ask any mechanic who does rear end changes. Pinion flange runout will change once you tear apart a differential. That little yellow mark that the factory makes will no longer be the peak runout point.</p><p></p><p>What is your pinion angle set to? When I say 90* I am referencing the Pinion flange being 90* vertical. Most IRS cars I assume will be like this from the factory but could vary. Remember the goal is to have zero difference in angle for the pinion flange and the crank. If my Crankshaft is 88*, I want my pinion flange to also be 88*, difference is zero.</p><p></p><p>Without having rubber or MM's front differential mounts, you will not be able to change the pinion angle. KB's kit since its aluminum allow for no flex or angle change at the differential ears. Therefore all you can acheive is a 90* pinion angle measured at the flange.</p><p></p><p>Again, I do not know what the pinion angle is on a factory IRS car.</p></blockquote><p></p>
[QUOTE="Stitch, post: 3028422, member: 4872"] That was a two part sentence. And yes, ask any mechanic who does rear end changes. Pinion flange runout will change once you tear apart a differential. That little yellow mark that the factory makes will no longer be the peak runout point. What is your pinion angle set to? When I say 90* I am referencing the Pinion flange being 90* vertical. Most IRS cars I assume will be like this from the factory but could vary. Remember the goal is to have zero difference in angle for the pinion flange and the crank. If my Crankshaft is 88*, I want my pinion flange to also be 88*, difference is zero. Without having rubber or MM's front differential mounts, you will not be able to change the pinion angle. KB's kit since its aluminum allow for no flex or angle change at the differential ears. Therefore all you can acheive is a 90* pinion angle measured at the flange. Again, I do not know what the pinion angle is on a factory IRS car. [/QUOTE]
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