i know i ahve asked before but i can not find the info i was given. what are the specs for the rear eheel studs on my 93 formula? ie length thread knurl diamater as i am trying to order some longerones for my car but i do not want to drill the axle flanges
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http://www.pontiacdriversclub.co.uk/ keeping it pontiac in the the uk. 93 formula a4 ZR1 rims
C A I , B M R torque arm lower arms panhard rod and sub frame conectors borla adjustble with Q T P valve and no cat WHAT NEXT ?
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Throwing a mic on an old stud I had laying around:
Knurl diameter: 0.505" (12.83mm) ("used" knurl - I think the stock spec for a new stud is 0.500", but I'm not positive)
Overall length: 2.137" (54.28mm)
-Cap of stud to end of knurl: 0.478" (12.14mm)
-end of knurl to end of threads: 1.305" (33.15mm)
-unthreaded end: 0.354" (8.99mm)
Threads are 12mm x 1.5
You can get longer studs with the correct knurl from Lingenfelter, GM Performance Parts and ARP.
http://www.lingenfelter.com/lingenfe...4&dept%5Fid=14
Problem with the Lingenfelter is that although the threads are 2.67", the unthreaded extension on the end is more than 1/2", not the small amount shown in the Lingenfelter catalog photo. They stick wayyyyyyy out of stock wheels:
Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor
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