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The Terminator
Driveline
Help me build the strongest IRS pumpkin possible
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<blockquote data-quote="SlowSVT" data-source="post: 13275582" data-attributes="member: 20202"><p>Keep in mind for street or road race work the iron case IRS won't run as cool as an aluminum one and don't think they don't get hot (iron "hands down" for drag racing).</p><p></p><p></p><p>Consider replacing the diff cover bolts with studs (5/16-18 thread). Grainger sells them. <u>This mod not really needed with iron diff case.</u></p><p></p><p><a href="http://www.grainger.com/Grainger/wwg/search.shtml?op=search&N=11085&in_dim_search=1#http://www.grainger.com/Grainger/double-end-threaded-studs/bolts/fasteners/ecatalog/N-8jxZ1z0o10j?Ndr=basedimid10071&sst=subset" target="_blank">Double End Threaded Studs - Bolts - Grainger Industrial Supply</a></p><p></p><p>[ATTACH=full]485454[/ATTACH]</p><p></p><p>Using a bottom tap will capture 4 more threads just make sure you use aluminum tapping oil. The stud needs to be shorted on one side. I can get the measurements later this week if interested. Bolts beat-up on aluminum threads, studs don't! I've got 12 pt nuts on the studs.</p><p></p><p> </p><p>Put your Mark Williams caps on a mill and skim a .875 long flat across the back side of the cap as shown.</p><p></p><p>[ATTACH=full]485455[/ATTACH]</p><p></p><p>Only do this on a cover with thrust pad screws like in the FRP diff cover (not doing this will focus the thrust load on the crest of the arch possibly distorting the bore. A flat surface will distribute the load over a wider area better) <u>If they are not used don't do this mod and leave them with the full arch. </u></p><p></p><p>Trash the cap screws that come with the Williams caps and replace with longer ones to capture more threads as you can see. I ran a 1/2-13 bottom tap and got even more.</p><p></p><p>[ATTACH=full]485456[/ATTACH]</p><p></p><p>I wanted to stud the caps but the counter bore in the Mark Williams caps require removing a lot of material to clear the nuts which kinda defeats the purpose :nonono: That and no one makes the correct length/spec stud :bored:</p><p></p><p>That should help take your diff to the next level :rockon:</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 13275582, member: 20202"] Keep in mind for street or road race work the iron case IRS won't run as cool as an aluminum one and don't think they don't get hot (iron "hands down" for drag racing). Consider replacing the diff cover bolts with studs (5/16-18 thread). Grainger sells them. [U]This mod not really needed with iron diff case.[/U] [url=http://www.grainger.com/Grainger/wwg/search.shtml?op=search&N=11085&in_dim_search=1#http://www.grainger.com/Grainger/double-end-threaded-studs/bolts/fasteners/ecatalog/N-8jxZ1z0o10j?Ndr=basedimid10071&sst=subset]Double End Threaded Studs - Bolts - Grainger Industrial Supply[/url] [ATTACH=full]485454[/ATTACH] Using a bottom tap will capture 4 more threads just make sure you use aluminum tapping oil. The stud needs to be shorted on one side. I can get the measurements later this week if interested. Bolts beat-up on aluminum threads, studs don't! I've got 12 pt nuts on the studs. Put your Mark Williams caps on a mill and skim a .875 long flat across the back side of the cap as shown. [ATTACH=full]485455[/ATTACH] Only do this on a cover with thrust pad screws like in the FRP diff cover (not doing this will focus the thrust load on the crest of the arch possibly distorting the bore. A flat surface will distribute the load over a wider area better) [U]If they are not used don't do this mod and leave them with the full arch. [/U] Trash the cap screws that come with the Williams caps and replace with longer ones to capture more threads as you can see. I ran a 1/2-13 bottom tap and got even more. [ATTACH=full]485456[/ATTACH] I wanted to stud the caps but the counter bore in the Mark Williams caps require removing a lot of material to clear the nuts which kinda defeats the purpose :nonono: That and no one makes the correct length/spec stud :bored: That should help take your diff to the next level :rockon: [/QUOTE]
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Help me build the strongest IRS pumpkin possible
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