Track wheel nut torque?

[GulfSeven]

The owners manual for my 310R says the road wheel nut torque should be 55 lb.ft.

a) that's quite low

b) the implication there is that there's a different torque for track (except the manual doesn't say anything further on the subject)

So are people just using the standard 55 lb.ft torque on track?

[Hampshire West AR]

55 lbft or 75nm for road or track is what I have alway used.  Check regularly throughout track day.  

Nick

[aerobod - near CYYC]

I normally run 80Nm, then before going out on a session check the torque is 75Nm if the wheels and hubs are still hot.

[Jonathan Kay]

The current pictorial style Assembly Guide for the 310 has:

Torque the wheel nuts to 65lbft (about 85Nm).

And the 2016 text-heavy version has:

Tighten wheel nuts to 74 Nm.

Jonathan

 

[GulfSeven]

Thanks all.

I think the user manual that came with my 2020 310R is the 2014 edition (which interestingly doesn't actually include the 310R).

So it seems that most people do use 55 lb.ft, but the latest assembly guide suggests 65 lb.ft?

[Jonathan Kay]

Tim: if you'd like the later Assembly Guides and Handbooks please send me a Private Message with your email address. 

Jonathan

[Wrightpayne]

23 years at 75nm - road and occasional track with no problem. Checked regularly.

On my '98 dedion car (Ford) I was more concerned with the minimal thread engagement on the OEM studs. These were changed for the longer (now standard) studs with enough thread to be flush with the top of open nuts (mk1 Elise in black)

[garybee]

"The owners manual for my 310R says the road wheel nut torque should be 55 lb.ft.

 

b) the implication there is that there's a different torque for track (except the manual doesn't say anything further on the subject)"

I think you're misunderstanding that sentence.  They are referring to the torque of the 'road wheel' nuts, not the 'road' wheel nut torque.

[GulfSeven]

Aha - well that would make sense.

Thanks to Jonathan for the latest Owners Manual too - it seems mine is the latest one  

[Gloucestershire AR]

Lower if you run an Ital axle (Triumph PCD) car with the thinner (11/16 rather than 3/4 from memory) studs?

[Jonathan Kay]

Yes. 

61 Nm with the Ital axle in the 1996 Assembly Guide.

Jonathan

[GulfSeven]

55 lb.ft worked very well on track today, with nothing coming loose 

[aerobod - near CYYC]

If you have the stainless wheel nuts with the step and aluminium chamfered washer that fits the step, I find they can loosen a bit on the rear hubs when they are too hot to touch, but just need a periodic check between sessions to confirm they are keeping their torque.

[GulfSeven]

Yes I was checking in between each session and all seemed good. Nothing needed tightening 

[Roger Ford]

Always used 55 ft lbs for racing. Don't check them that often and I've never found a loose one (except, ahem, when I haven't torqued them).

[p.mole1]

don't over torque the fronts or you risk cracking the front hubs