I'd like to tap into the forum's wisdom about wheel nut torque for March 87C center lock wheels. The car is actually an old IMSA GTU car that uses March uprights and hubs (and wheel nuts). Wheels are BBS magnesium centers. I've recently completed re-assembling the car after it sat for many years after a wreck. After talking to a few people and doing some research, I decided to torque the wheel nuts to 350 ft-lbs, no lubrication. At Watkins Glen yesterday a rear wheel nut came loose. Fortunately it didn't fall completely off, and I managed to pull safely off track. I am not sure what I did wrong and do not want to experience this again! I'd like to get input on the torque value and the process I used to tighten them.
1. Snug wheel nuts while car is jacked up
2. Lower car, torque first to 150-200 ft-lbs [I'm guessing this step is unnecessary. Skip?]
3. Torque to 350 ft-lbs
3. Re-torque to 350 ft-lbs after first session
Thoughts? Thanks.
Scott