Assassin bars

Norm? Oh, youre in big trouble now. lol

The trick is to run near zero,when the power is running through it. If youre running slanty springs and no snubber this might require a ton of nose down.If youre running SS springs and a snubber 4 or 5 might do it. If youre running a stick car, coming off the line at 5000, and really hooking, you might need 7*. If you have 300hp, or 700 hp; new numbers. Auto or stick? new again. Street or track? new angle. Multi-link, ladder bar, snubber, slapper bars,change in ride height due to spring change,or,heaven forbid, air shocks? All could be different.
So where is normal?
And if your running a typical spring set-up, its not something you can just change at the drop of a hat.
Sorry. I just couldnt help myself.

You must be snowed in. The norm in my response was be taken for what each car has as in your discription. Not a set angle just because of these bars.