360 Titanium lug torque - Ferrari Life
 
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post #1 of 6 Old 02-10-2013, 09:04 PM Thread Starter
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Titanium lug torque

Hello all, I went and bought the titanium lugs to match my CS wheels on my 360. Yes they are very light, but I am certain I will not detect any driving difference.
I mostly like the look, so I paid a small fortune for that.

Anyway I have been reading everything I can find, and I can not find a specific titanium spec.

What I am finding is to torque in stages up to 74 ft lbs (100 nm),

Is this applicable to all type of lugs? I looked thru my owners manual, and there is no mention as I suspected being my car is not a CS.

I also feel I should re-torque after a few heat/cool cycles.

Does anyone have any input on this?

Thank you

Rich
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post #2 of 6 Old 02-10-2013, 10:45 PM
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Rich- Everything I have seen says to use the same torque as the steel wheel bolts. Some of the pros use 100 lb ft instead of 100 Nm, so maybe one of them can chime in on what to use. I have titanium bolts on my 575M, and they are torqued at 100 Nm.

Taz
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post #3 of 6 Old 02-11-2013, 03:11 PM
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My Scud manual has the torque at 100 Nm = 74 ft.lbs.
I think 100 ft lbs is too much and close to damage level.
Re-torqueing is always a good idea.

Dan
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post #4 of 6 Old 02-11-2013, 06:37 PM Thread Starter
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Thanks Taz and thanks Dan, I will then leave them as is which is now 100 nm. I will retorque them after a few heat cycles. Unfortunatly here the weather is relentless and I have not pulled my car out since October.
If you both run 100 nm without issue, I am safe.

Thank you very much for your input. Now, If you can send me some warm dry weather!!!!!

Rich
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post #5 of 6 Old 02-12-2013, 01:04 AM
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I believe the factory spec is to torque to 40nm and then to 98nm. I wouldn't use any grease on the threads - the grease allows the bolts to tighten in further than they would without any lubrication. As the youngs modulas of titanium is much lower than steel there is a real risk of stretching the bolts.
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post #6 of 6 Old 02-12-2013, 11:27 AM
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Yes, it should be done dry and in stages. Though that's always the case.

Dan
Current: Scuderia
Past: 330GTC, 512TR
Quantum Mechanic, Quarks repaired, Black Holes refilled.
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