I am running stock studs with RPF1s and Kics lugs (open ended, very deep). No spacers.


At tech last weekend they said I needed longer studs because they need to stick out past the end of the threads on the lugs. Now I agree that it would be BETTER if they did (more threads being used), but I don't see how this is unsafe. The only reason they don't stick out is because there are more threads to use than OEM. The actual number of threads used could very well be more than OEM. I thought all the mattered was how many turns down you were (which Im at least 7 or 8 full turns on). If they were closed nuts for all the tech would know I am only half a turn down.


I have purchased ARP extended studs anyway, since I agree its better, I just want to know from an engineering perspective why he gave me a hard time about them. Would I somehow be better off with less threads, just so the stud goes past? Again, no spacers or anything to make the stud any shorter, the only real difference is the lugs are longer.

 

That guy was a fool, but your are all set now. Very similer setup to what i run now.

 

Here is a simple drag racing inspection item:

Exposed threads must be at least twice the diameter of the stud. In other words if the diameter of the stud is 5 mm you need 10 mm of exposed thread for a nut.

 

Always happy to help. If you have other questions please do not hesitate to waste my time.