I figure the FI group should be the most knowlagable on this topic so...

I plan to get a craftsman tq wrench 1/2 drive. I have a choice between 75lb rated or 150lb. Just wondering what to go with. I'm kinda leaning to the 150lb.

 

buy the big one. its useless on a honda engine, but its always good to have the extra capacity for other things. while your at it buy an in/lb torque wrench, youll need it for half the engine components torque specs. or you can always use the old calibrated torque forearm like me.

 

ANSI standards require that the published tolerance value applies to the middle value of the wrench's torque range. In other words, if the wrench is rated at +/-1% and has a range of 0-75 ft-lbs, the 1% tolerance will only apply at 37.5 ft-lbs; the extreme ends of the spectrum can have a much larger tolerance.

However, with the 150 ft-lb model, the published tolerance lies at 75 ft-lbs. That's almost exactly where you set it when you tighten your head studs. Furthermore, the head studs/bolts are the most important bolts on your entire engine to consistently torque.

Hopefully that spells it out for you. The 150lb wrench is exactly what you need. And please, for the love of God, don't use it on your rod bolts. Either use a stretch gauge or leave the engine building to the big boys.

 

I agree with Legion.Try to stay near the middle of the wrench.I have three (1/4",3/8",1/2" drive)that I use on a regular basis.

 

does it go from 30 to 150 or is it 20 to 150. if it 20 to 150 get it.