450 lbs. torque with 1/2 in t. wrench - iRV2 Forums- torque wrench that goes to 450 ft lbs ,26/11/2005· heres how to get 450 lbs. of torque with a 1/2 in. torque wrench. you need a 3/4 " breaker bar and socket to fit lug nuts. then take a 3' piece of pipe that will slide over the 3/4" breaker bar. weld a 1/2" heavy impact socket on the end of the piece of pipe, be sureWheel lug nut torque Specs? - iRV2 Forums31/1/2013· I use a 1/2" drive long handle torque wrench that goes to maybe 250 ft lbs, on a Snap-On 4x torque multiplier that has 3.33 net multiplication. For 475ft-lbs I set torque wrench to 142# (spec on my 22.5 rims was stated 450-500, so I shoot for the middle).