How to torque things I can't get a torque wrench on?
Could I use a crows foot wrench or a regular box end wrench. Then use This Sight to do the math.

Will that work? I'm going to be adjusting the valves and the nut needs to be torqued while I have a screw driver on it.

 

A crowfoot would get you plenty close.

I've never thought to torque the valve adjusting locknuts, but I've got a lifetimes experience at tightning things.

 

The nut on the valve isn't that critical, so you might be able to get away with doing it by hand like millball.

For something more critical (like A/C connectors, or fuel line flare nuts) you can use a crows-foot and torque wrench with the computation for offset. Even easier; set the crows-foot to 90° on the torque wrench. Then the length difference is less than 1% and it really is close enough (your torque wrench is not calibrated within 1% anyway).

Just so you know, you can now get flare-nut crows-foot wrenches. http://www.harborfreight.com/7-pc-38...set-68999.html

 

The calculator appears to be correct. It's important to notice that hand position is critical when you are doing this. If you have a click stop wrench, normally hand position is not critical, but when you are extending the wrench, it is, because pure torque gets changed to part torque and part translational force.

If you have beam wrench, the handle is already set up to ensure proper hand position. Just measure to the pivot point of the handle for the computation.

If you can get away with a 90 degree angle on the crows foot, then scope is correct that you need no fancy calculations.

 

Edit wrong post.