garrett376

Hi guys/gals,
I was at Discount Tire getting some tires for my 911, and saw on a sheet that the Carrera GT's wheel torque value was listed at 470 ft/lbs. Is this correct? I'm just curious, and I figured you guys should know!

themarsman

No it isn't 470 ftlb.

You are supposed to tighten wheel nut to 550Nm (407ftlb) + 25 Nm (19 ftlb).

IcemanG17

Here one way to look at it...most of us have 5 nuts at about 96ft/lbs or 480 ft/lbs...so one nut with 407ft/lbs seems about right?

Woodster

The dealerships have a special "torque multiplying wrench" for doing this,
otherwise you would need a very long breaker bar!
mk

garrett376

That's cool, thanks for the info, guys!

SPR

I was actually told by the mechanic, because the locking tabs weren't clicked out on one of the collars, that you use the torque multiplier and with that you can use a regular torque wrench. Dunno how much truthful that is but I am sure the manual would cover that.

Steve N.

Iceman: My CGT has four nuts; other street Porsches have 20, but I only have two - last time I checked. Same as most guys.

Sorry - couldn't help it. Others have shown proper restraint.

JasonAndreas

The "torque multiplier":

A = (Ta - Tw) * L / Tw

A = Length of adapter needed, in inches
Ta = Required torque at working end, 407 ft/lbs.
Tw = Torque wrench reading from its scale, 250 ft/lbs
L = Length of torque wrench, from handle center to drive center, 18"

using my large torque wrench I'd need an 11.3" extension :

(407 - 250) * 18 / 250 = 11.3"