 Blondie has chafing between the legs..... |
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| Joe Bob |
 Jan 1 2004, 11:12 PM
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#1
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Retired admin, banned a few times  Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None  |
I have a rubbing on the inside wheel wells due to a chassis stiffening kit. I need to space out the wheel to lower the rear and try and get some more negative camber....what is the minimum number of turns that a lug nut have to be safe and/or legal for DE or AX?
I can always add longer studs but I would like to avoid the labor if I don't have to....or should I just use open top nuts and see if the studs pass the top of the nut when fully tightened? |
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| Gint |
Jan 1 2004, 11:21 PM
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Mike Ginter Group: Admin Posts: 16,071 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains  |
There is actually a spec (SAE?) for fasteners regarding the amount of thread engagement of a nut on a bolt. I don't remember what it is. I think I heard soemthing about this from Geoff at one time or another.
After thinking about it, it might have been Sammy. This post has been edited by Gint: Jan 1 2004, 11:22 PM |
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| J P Stein |
Jan 1 2004, 11:22 PM
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
I use the 7mm spacers and put on steel lug nuts....IMO, the stock stud ain't doing the trick. I get about 6 turns, 9 would be better or one thread past the nut, better still.
I'm getting longer studs. |
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| SirAndy |
Jan 1 2004, 11:41 PM
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#4
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Resident German Group: Admin Posts: 41,640 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
somehow, the number 7 comes to mind ....
where's brad when you need him? Andy |
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| Gint |
Jan 1 2004, 11:45 PM
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#5
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Mike Ginter Group: Admin Posts: 16,071 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
It's starting to come back to me. I vaguely recall a measurement. Something like the bolt should actually engage all of threads on the nut, plus an additional 1/3 of the thickness of the total threads on the nut.
But what do I know. |
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| Carrera916 |
Jan 1 2004, 11:46 PM
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#6
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Member Group: Members Posts: 292 Joined: 9-February 03 From: Pleasanton, CA Member No.: 273 |
I would have to agree with JP as from my experience watching & working on race cars, we always put a longer stud on with the idea of at least a thread or two sticking out of the nut. You would want the full clamping force on the wheel expecially if you're gonna drive her hard around the corner....
j |
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| Brad Roberts |
Jan 2 2004, 12:48 AM
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#7
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
This is from PCA:
"Wheel bolt/lug nut engagement must be at least one times the bolt/stud diameter." This is nine turns on a Porsche set-up. NHRA is different.. (IMG:style_emoticons/default/laugh.gif) (burnout Z) B |
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| ArtechnikA |
Jan 2 2004, 06:30 AM
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#8
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(mikez @ Jan 1 2004, 09:12 PM) ....what is the minimum number of turns that a lug nut have to be safe and/or legal for DE or AX? ...should I just use open top nuts and see if the studs pass the top of the nut when fully tightened? the Zone 8 spec used to be "end of the stud and tight". my roadwheels barely meet this spec with stock studs and no spacers (fat cast pseudoFuchs). i suppose i could have 0,1" milled off the lug nuts to make them legal, but somehow i don't think that's what they meant... i can send you a spare steel lug nut if you want, but i have to believe you have a source closer than me ... i believe the generic thread engagement spec is 1.5 x the diameter of the stud. just bite the bullet and install 100mm studs with NASCAR ends ... |
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