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Extended studs/Spacers

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Old 02-19-14, 07:10 PM
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timmy0tool
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Originally Posted by RA40
For lug engagement you basically want it to be the thickness or more of the stud. So getting 10 turns is a conservative amount. Thread pitch X turns.

PD's suggestion is check length relative to your spacer application. The H&R with built-in studs is a top choice. There are makers of custom spacers as well if you want a thickness between what HR offers.
agreed though i did less. i ran 5mm spacers on my rear aftermarket wheels and got only 5 full turns on the lugs. this worked worked out for me (and i run full negative camber on the stock cam bolts).
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Old 02-19-14, 08:29 PM
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I have always told customers you need at LEAST 7 complete turns which is enough for casual street use. If they plan on anything more than A->B->A type of driving they want more. For track and AutoX I always suggested at least the diameter of the stud, and preferable full engagement on the nut with extra stud left over!

That said, I have AutoX'ed on 7 threads and needed to replace my lug nuts after... In part was due to my "light weight racing lugs" aluminum construction!
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Old 02-19-14, 08:52 PM
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Originally Posted by PureDrifter
factory UHL (under head length) is 1.5748in (i checked for a '99).
Too the TEN THOUSANDTH!?!
You sir, care more about insignificant figure than I do!
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Old 02-20-14, 12:26 AM
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Originally Posted by PureDrifter
factory UHL (under head length) is 1.5748in (i checked for a '99)
ARP UHL (is300) is 2.6"

I would take a stab and say a 20-24mm spacer would be fine on it, but depends on the wheel pad thickness.
I thought those were pretty long studs. Thanks for confirming the stock length.
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Old 02-20-14, 11:35 AM
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Originally Posted by Shmee
Too the TEN THOUSANDTH!?!
You sir, care more about insignificant figure than I do!
given that you're an engineer I somehow doubt that
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Old 02-20-14, 02:34 PM
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Lol, maybe.

But there's also part of me questions the accuracy or necessity to go to the ten thousandth on a non-critical dimension.
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