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Old 01-18-2012, 05:00 PM   #1376
aesthetect
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damn, the imprezas proportions look so different in this pic, looks way bad ass, mean

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Old 01-18-2012, 05:11 PM   #1377
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Originally Posted by 07wrx84 View Post
I don't agree with this statement!
What facts do you have to bring to the table?

Quote:
Originally Posted by vision.dynamix View Post
There has been posts around stating that a 5mm spacer is "okay" for use on stock Subaru studs.

Now, lets Preface this by saying that at minimum, on a M12x1.25 stud, we need 10mm of thread engagement, or 8 complete turns.

I went out in teh garage today with a 5mm WheelTek spacer, and here's what I found.

All 3 sets of Rotas (17x7.5 TarmacII, 18x9.5 Grid, 17x9 DPT) here, without a spacer, give me 9.5 turns to 30ftlbs, and about another 1/6 turn to 70ftlb.
The set of Bugeye Wheels here, without a spacer, gives me the same 9.5 turns to 30ftlbs.
The set of 18x8 OZ Ultralegerras here, gives me 9.25 turns to 30ftlbs.
The set of 17x8 Enkei RPF1s here, gives me 9.25 turns to 30ftlbs.

9.5 turns gives me 11.875mm of thread engagement. Only 1.875mm more than the minimum of 10.
9.25 turns gives me 11.56mm of thread engagement. Only 1.56mm more than the minimum of 10.

With a 5mm spacer, I only got about 5-5.5 turns to 30ftlbs. Thats 6.25-6.875mm of thread engagement. Thats 3.125-3.75mm too little thread engagement.

With stock studs, there is only 1.5-2mm of stud lenght to dedicate to a spacer. Any more is sacrificing safety.

Anyone is welcome to check my work. Fully tighten a nut. Then start testing in another stud. Turn the nut by hand, and stop as soon as it catches the threads. Put the socket on, mark the top, and start turning. Use a ratchet if you want. When the mark gets back to the top, that is 1 full revolution. Count how many revolutions it makes.
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Old 01-18-2012, 05:12 PM   #1378
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Originally Posted by aesthetect View Post
damn, the imprezas proportions look so different in this pic, looks way bad ass, mean
Thanks, the car is getting lots of exterior mods this winter...hopefully done by spring.
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Old 01-18-2012, 05:28 PM   #1379
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Quote:
Originally Posted by vision.dynamix

What facts do you have to bring to the table?
Because 1mm= .03973" so X 3 = .11919" your only talkin half a width or so of a bic pen. Not a whole lot.
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Old 01-18-2012, 06:04 PM   #1380
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Originally Posted by 07wrx84 View Post
Because 1mm= .03973" so X 3 = .11919" your only talkin half a width or so of a bic pen. Not a whole lot.
I know what 3mm looks like.

You realize were talking about 1.25mm thread pitch here, right? Thats over 2 full revolutions of thread engagement.
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Old 01-18-2012, 06:22 PM   #1381
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HA. I can't believe people are actually arguing this point.
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Old 01-18-2012, 06:46 PM   #1382
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Just let the wheels fall off. It will be more entertaining then this back and forth blah blah.
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Old 01-18-2012, 06:51 PM   #1383
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Just let the wheels fall off. It will be more entertaining then this back and forth blah blah.
They're far away from me, so let it happen.
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Old 01-18-2012, 07:05 PM   #1384
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Quote:
Originally Posted by vision.dynamix

I know what 3mm looks like.

You realize were talking about 1.25mm thread pitch here, right? Thats over 2 full revolutions of thread engagement.
Ok Sherlock

Yes i am a machinist and do it for a living...
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Old 01-18-2012, 07:27 PM   #1385
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Youre a machinist and you dont understand minimum thread engagement requirements?

Whatever. Run your spacers.
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Old 01-18-2012, 07:43 PM   #1386
aesthetect
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^ and dost thou have any substantiation for thine assumption of a requisite "10mm of thread engagement, or 8 complete turns", oh keeper of thread engagement knowledge?
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Old 01-18-2012, 07:53 PM   #1387
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Quote:
Originally Posted by vision.dynamix
Youre a machinist and you dont understand minimum thread engagement requirements?

Whatever. Run your spacers.
U mad bro?
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Old 01-18-2012, 07:54 PM   #1388
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I thought it was common knowledge that generally speaking (not specific to wheel lugs) the minimum egagement of approximately the thread diameter. But I'm no machinist lol
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Old 01-18-2012, 07:56 PM   #1389
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Quote:
Originally Posted by frederik View Post
I thought it was common knowledge that generally speaking (not specific to wheel lugs) the minimum egagement of approximately the thread diameter. But I'm no machinist lol
This is a good rule of thumb. 3mm can make a world of difference, despite what our resident machinist claims.
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Old 01-18-2012, 08:00 PM   #1390
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Quote:
Originally Posted by RossLH

This is a good rule of thumb. 3mm can make a world of difference, despite what our resident machinist claims.
Well were talking stock wheel studs for the record. Its not that big of deal as you guys are making it out to be. But go ahead and do what you want. And ill do what i want. Plain and simple...
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Old 01-18-2012, 08:02 PM   #1391
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The general rule of thumb for fasteners is minimum 1 diameter of thread engagement. TireRack specs 8 turns/10mm for M12x1.25.
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Old 01-18-2012, 08:07 PM   #1392
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Quote:
Originally Posted by vision.dynamix
The general rule of thumb for fasteners is minimum 1 diameter of thread engagement. TireRack specs 8 turns/10mm for M12x1.25.
M12x1.25

12= major diameter = .4724"
1.25= pitch in mm
Pitch is one crest of thread to another crest of thread.
1.25 X .03937"= .0492125"
.0492125/1"= 20.3204 threads an inch.
So 3mm spacer is .11811" so that means your only using 2.4 threads of the stud. Its not that big o deal

Last edited by 07wrx84; 01-25-2012 at 06:44 PM.
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Old 01-18-2012, 08:14 PM   #1393
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Wait what? Its accepted around here that 3mm is "okay". It IS pushing it, for most wheels, because it leaves you with about 1mm too little thread engagement.
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Old 01-18-2012, 08:15 PM   #1394
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Originally Posted by 07wrx84 View Post
I agree 100% on this. Im just sayin 3mm isn't enough extra material to take away from stock studs.
You agree that 10mm is the minimum thread engagement, yet you're fine with 8.25-8.75mm of thread engagement? Well at least you're not contradicting yourself.
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Old 01-18-2012, 08:23 PM   #1395
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Quote:
Originally Posted by RossLH

You agree that 10mm is the minimum thread engagement, yet you're fine with 8.25-8.75mm of thread engagement? Well at least you're not contradicting yourself.
Im fine with whatever you think is fine. Some of you guys act like a bunch of gossiping women on here.
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Old 01-18-2012, 08:35 PM   #1396
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When safety is an issue, the correct info has to be posted. People who dont know better read these forums and take things as fact.

It's like when the 06/07 taillights came out. Some idiot said you can bake them to split them..someone tried it, melted their tail lamps and had a fire in their oven.
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Old 01-18-2012, 08:36 PM   #1397
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I guess its my own fault for holding owners of Subarus (especially those with built Subarus and some supposed knowledge of machine design) at a higher standard than Civic ricers.

As I said earlier, you're far enough away from me, do what you want.
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Old 01-18-2012, 09:02 PM   #1398
07wrx84
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Quote:
Originally Posted by RossLH
I guess its my own fault for holding owners of Subarus (especially those with built Subarus and some supposed knowledge of machine design) at a higher standard than Civic ricers.

As I said earlier, you're far enough away from me, do what you want.
Don't lose sleeping knowing someone has 3mm spacers on there car with stock studs. You might have a stroke. Lol
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Old 01-18-2012, 09:44 PM   #1399
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Originally Posted by vision.dynamix View Post
Wait what? Its accepted around here that 3mm is "okay". It IS pushing it, for most wheels, because it leaves you with about 1mm too little thread engagement.
Most are going to just roll to In & Out Burger anyways. So if its going slow down main street and can flip a u turn. Its gotta be good.


As for me. I do not run any wheel spacers. I have seen them crack, I have seen people loose wheels, I have seen people have vibration problems.

I use correct offsets and adjustable laterals and trailing arms to make fine adjustments. Which I have zero problems, and do not have any concerns with safety once tested and set up. I'm even on a widebody.

See someone loose a wheel at speed and well.. its not so cheap then. I can't understand why people cut corners. It almost always bites you in the end.

Maybe being a motorcycle guy I understand how important it is to keep your wheels. You can always roll to a stop if something goes wrong. With out wheels... its a whole other end. Its also dangerous to the traffic around you.
Loose a wheel on the freeway at 75mph and it bounce over the wall to oncoming traffic and you can kill someone.
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Old 01-18-2012, 09:54 PM   #1400
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Originally Posted by RossLH View Post
I guess its my own fault for holding owners of Subarus (especially those with built Subarus and some supposed knowledge of machine design) at a higher standard than Civic ricers.

As I said earlier, you're far enough away from me, do what you want.
As the cost of Subaru's drop. The lower crowds buy them up. The evolution of a subaru owner begins.

Quote:
Originally Posted by 07wrx84 View Post
Don't lose sleeping knowing someone has 3mm spacers on there car with stock studs. You might have a stroke. Lol
Stock studs on a true 400+whp car is stupid to begin with. Let alone wrong offsets.
---------------------------------------------------------------------------------
Anyone figure out stock wheel studs, with spacers. Then add leverage of wrong wheel offsets and come up with a breaking point in psi? Excel spread sheet on WHP, So you could look at your offset, your whp and come up with oem wheel stud strength. Or something like that...

So if that sounds stupid. I'm on doc's pain meds.... lol
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