Pistsa/F8 Style Wheel Bolts

I bought a set of the Ferrari Ti bolts from eurospares, best price I could find. ($1600) I liked them the best so I just paid the price!

 

Very nice 2 piece bolts, and I also bought the Allen head socket:
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A number of us use these on our Porsches. https://www.acerracing.com/collections/titanium-lug-bolts/products/porsche-911-titanium-lug-bolts?variant=14347910152227

They are two-piece on Porsches, one-piece for Ferraris, but come in hex head and can also be ordered in black finish. https://www.acerracing.com/collections/ferrari/products/ferrari-titanium-lug-bolts

 

Ferrari Ti Bolt set:
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I think Ferrari may have several part numbers, IIRC Ferrari titanium bolts used to be single piece (so that some preferred to go for alternative suppliers offering 2-piece bolts) and the Ferrari 2-piece bolts might have been released only recently.

 

Two-piece vs. one-piece lug bolts.




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Such a specialty video. Would not think they are interchangeable on the same wheel because the lug torque setting has to take into account the friction of the lug hole surface to the bolt head with the one-piece. The two piece would have less bite and drag on the lug hole and more stretch in the bolt thread so lower torque setting for the same tightness. Doesn't seem much but when using a torque wrench where there is no 'feel' could get you into trouble. I would stick with stock bolts.

 

True. It would depend on the difference in the coefficient of friction though, as the second piece of the bolt also has friction. If the coefficient of friction is roughly the same as between the aluminum wheel and the titanium second piece, the torque requirement should be roughly the same. Also, the coefficient of titanium is roughly the same as that of the hardened steel stock bolts, which are one piece. So I would think they're really close, and if you over-tighten the bolts a bit, it's probably OK.

Also, the two-piece design is probably mostly about protecting the wheel lug seat given that both steel lugs and titanium ones have close to the same coefficient of friction.

 

Speciale manual says 100nm/74 ft.lbs, same as 458, so I would think same for 488/Pista.


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Generally agree. However, the steel one piece drags through the wheel lug hole inner diameter as it turns spiraling into and widening the painted aluminium surface diameter of the lug hole. The two piece has no spiraling action and is also Ti to Ti spinning flat together. I think the two piece will be smoother and thus need less torque setting for the same level of tightening. You should feel a difference if not using a long torque wrench. This is of course being careful that the bolt/threads/surfaces are dry at all times.

I once made the mistake with aluminum DD wheels using a torque wrench set to factory spec but some machine oil was on the one piece steel bolt and head. This greatly reduced the friction at the wheel hole surface and the bolt really was over-tightened even at the OEM setting. After that time, the lug never felt right due to the wheel hole being enlarged just a bit. Always felt it would not snug up. When I rotated tires could always find the one that seemed loose even using a different bolt.

 

Yes, definitely do not lube the lugs.


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