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83 911 Production Cab #10
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Correct Wheel Studs Lenght for 1.25" Spacer
Hi guys
Well, upon cleaning the wheels, I noticed that the nuts on the studs on the front spacers are not fully "engage" as the stud seem to be definitely too short. On the back spacers (2"), the studs protrudes by about a quarter inch. Since the CAT list the original stud as 45mm (83SC), once you add the 32mm for the spacer, the stud should be at least 77mm. Since our host carry 72mm & 100mm it would be probably be safer to go with the 100mm ones. Short of removing one of my fitted one, can anybody confirm my "educated guess" of 100mm. Thanks J.J. Front Spacer 1.25"  Rear Spacer 2" 
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Who Will Live... Will See  83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger |
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10-28-2009, 04:42 PM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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This answer will cause some controversy so stay with me on this. Common convention leads us to think we need some exposed stud length thru an open nut. Since the Porsche stud is 14 mm diameter, we feel the "nut" should have a body "height" of at least 14 mm to capture one-full diameter equivalent amount of thread engagement. This is the standard convention. Actually... a bit more is desirable if we like to see 1-2 threads exposed beyond this.
Here's the rub. If this were true....how come the newest Porsches...with the "bolt" instead of nut and stud.....have an enagagement "depth" in the brake faceplate ( the plate thickness the bolt screws into ) of only 7 mm ??? ... and still be considered OK for a 14 mm diameter bolt ??? If that is OK...then I submit that in this case having the "ideal" full diameter thread engagememt is not all that critical as long as there is at least 7 mm engagement. What say others??
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Wil Ferch 85 Carrera ( gone, but not forgotten ) Last edited by Wil Ferch; 10-30-2009 at 08:07 PM.. |
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10-30-2009, 07:56 PM
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Make My Day
Join Date: May 2003
Location: Northern NY
Posts: 1,305
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+1 , they look fine to me.
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74 911S Targa ROW Building Designer/Business Owner |
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10-30-2009, 08:17 PM
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Registered
Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Here's a previous thread I was engaged in that spoke to the same issue. The "bolts" used in 996 era cars only have 7 mm of faceplate thickness that thay screw into.... no more.
996 wheel bolt...5 threads engage ?? If you don't have patience...go to page 3 post #45, where I start to say "Mystery solved".
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Wil Ferch 85 Carrera ( gone, but not forgotten ) Last edited by Wil Ferch; 10-30-2009 at 08:21 PM.. |
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10-30-2009, 08:18 PM
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83 911 Production Cab #10
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I started to wonder
Wil and wowzer911
Thanks, I started to wonder if I was going to have to kick start the thread... Look like I got about 10mm engagement so it will stay like this until at least when I upgrade to brakes to Turbo Look one. Cheers J.J.
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Who Will Live... Will See 83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger |
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10-31-2009, 05:29 AM
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Das Babe
Das Babe Metalberiech
