Got a new set of QA1 2 1/2" id springs for the front for my car. A arm tube chassis set up. I have read a lot of QA1's info but I haven't found how to actually set them up. Some guy's say just snug up the spanner nut and some say screw them up a inch from when the spanner nut makes contact. Anyone know what the proper setup should be?

Put on enough spring to hold the car up, and set your ride height. My preferred spring is a 300 (varies from car to car) as it allows me to compress the spring some (stored energy). After 4 years, and a couple of ride height changes as they started to sag, I was due for new. I had some 350 in the shed, so being a cheap Mopar guy, I threw them on. It didn’t take many turns to get my ride height at my “preferred” spot, but the front is stiff as L!

I will also note my “preferred ride height” work around the shock being extended a couple inches so they will be allowed to “work”. Using the “zip tie” method I know they’re not bottoming out so I’m assuming I’m in the ball park.

The shock has a certain installed length at ride height that needs to be maintained. A lighter spring will need to be compressed more than a heavier rate spring to accomplish that. A light spring compressed will store some energy to help get some separation and pitch rotate. Higher horsepower deals won't need the help and will benefit from a heavier spring. The exact rate needed depends on the geometry, shock angle and attachment location, weight on the front end, etc.