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Discussion in '456/550/575' started by F612, Jun 9, 2020.
I put HE spacers on the rear rims only and they are perfect.
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Why the different approach street vs race cars?
Novitec NF2s were actually designed for 360s (same wheels are marked on the box for 360 or 575), so the offsets are larger than for OEM wheels and they sit further in. You need spacers on the rears to keep the 12.5" wheels and wide tires from contacting the inside of the wheel well on Maranellos.
550/575M Five Spoke/Modular 18”, 5 X 108 mm
Front 8.5J X 18 ET 43.65 mm, Rear 10.5J X 18 ET 32 mm
575M/575 Superamerica Five Spoke Modular 19”, 5 X 108 mm
Front 8.5J X 19 ET 43.6 mm, Rear 10.5J X 19 ET 32 mm
Novitec NF2 (Not OEM) Five Spoke, 19”, 5 X 108 mm
Front 9J X 19 ET 28 mm, Rear 12.5J X 19 ET 51 mm
type2 never comp loose from hub if properly torqued so you can properly torque wheel to spacer and be fine on street. Racing puts so much stress that we check torque after every session on track. That is an easy job with a type1 because it is just sandwiched on longer bolts or studs. If you race on Type2 you have to remove wheel, check spacer to hub torque replace wheel and torque. Too much work!
oh always use hubcentric spacer
safety vs weight
FBB- Those longer bolts should need a different torque value. Any rules of thumb?
I know of no torque chart that has the length of bolt as a factor although common sense dictates that the amount of stretch in a bolt due to a certain torque value is going to be a factor of it's overall length. The practice of "Torque to length" would seem to prove this.
It would seem that the longer the bolt the less torque would need to be applied to achieve a pre-determined length.
Or am I dreaming?
In any case I seriously doubt that in this instance, a wheel lug bolt, the length of the bolt would have any measurable effect on the security of the fastener given the same torque value.
I check my type 2 HE spacers after each track day. Never had any bolt come even slightly loose--and I've run it hard.
I've been racing off and on since 1960, used to check wheel lug torque before every session. I never once found one that needed tightening. One time I asked a professional mechanic who looked after several cars at the races if he had ever found a loose lug nut/bolt, No he hadn't he said so I gave up on that. Torque once when changing wheels/tires and that was it for the weekend.