Saturday Night Racer

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Saturday Night Racer >> RACE TECH >> Lug nut torque ???
http://www.latemodelracer.com/cgi-bin/yabb2/YaBB.pl?num=1378161147

Message started by mini07 on 09/02/13 at 3:32pm

Title: Lug nut torque ???
Post by mini07 on 09/02/13 at 3:32pm

1" nut on 5/8 coarse thread stud ??

Title: Re: Lug nut torque ???
Post by over4t on 09/02/13 at 7:36pm

Aluminum wheels-70 lbs., Steel wheels-80 lbs.

Title: Re: Lug nut torque ???
Post by mudslinger47 on 09/03/13 at 12:16am

Milwaukie impact

Title: Re: Lug nut torque ???
Post by TALON75 on 09/03/13 at 12:47am

Well that explains Bako earlier this season!lol 75ftlbs on steel or aluminum.

Title: Re: Lug nut torque ???
Post by mini07 on 09/03/13 at 7:58am

My battery gun rated 240 lbs. seems to be biting into wheels.

Title: Re: Lug nut torque ???
Post by over4t on 09/03/13 at 12:16pm

Got the numbers I gave, 70# aluminum, 80# steel, from an old tire/wheel guy that knew his stuff. Did some digging on this and it's surprising how few wheel manufacturers give torque recommendations on their racing wheels. You can find numbers for about any size passenger car or truck. Basset is one of the few that does and they say 85# on their steel wheels and Basset has one of the stronger center sections of any wheels out there.
ARP gives a strength value on a 5/8 170,000/190,000 stud of 210 lbs. but darned few, if any, wheels' centers are that strong. The 45 degree lug angle on racing wheels ups the clamping force way over the 60 degree stuff that's common on street wheels. Gunning them on to over 220 lbs. is tough on the coined holes on the wheels , the nuts and the wheel studs themselves. Of course that's what nearly all of us do at the track and then we wonder why our wheel wobbles...if it lasts that long without a hit.
The best idea is to take the time and torque them on at home when new and try not to get too enthusiastic with the gun at the track.

Title: Re: Lug nut torque ???
Post by mudslinger47 on 09/05/13 at 5:57pm

TALON75 wrote on 09/03/13 at 12:47am:

Well that explains Bako earlier this season!

Torque wrench makes zero difference if you don't even look at the wheel.... ;)

From my best recolection, sense my mid twenties to now, 65 next month, I have had 5 loose wheels. Now all that racing and and five loose wheels ain't bad, concidering evertyone of them were from not even looking at them, like I said Torque wrench would make zero difference. How many times this year have you seen a NASCAR Cup car have a loose wheel at the biginning of the race, after the initial grean, I believe there have been three. They torque theirs before they start....No sure way, Ole Millwaukie as good as any. I have one car to take care of, you have four, you re-torque after each time you pull the wheels off? We had ours off a minimum of six times last Sat night....

Title: Re: Lug nut torque ???
Post by TALON75 on 09/05/13 at 8:55pm

everytime before the car hits the track, torque, pressures, mud plugs. I try not to hammer on the lugnuts that hard, carbon fiber lugnuts don't like that so I have to use a torque wrench .

And I must say, I usually have some help at the track so it isn't something I always have to do myself, but I do make sure it was done, peace of mind is priceless .

Title: Re: Lug nut torque ???
Post by formercrewguy on 09/06/13 at 8:03pm

Tighten them till they squeak.

Title: Re: Lug nut torque ???
Post by mudslinger47 on 09/08/13 at 3:14pm

formercrewguy wrote on 09/06/13 at 8:03pm:

Tighten them till they squeak.

We talkin about your wallet? ;)