what is the best bottle orientation? i have seen the valve anywhere from pointing at 5 o'clock to 7 o'clock. what is best?

 

It is recommended that the bottle valve be facing forwards. This will put the pickup tube that is in the bottom of the bottle in the rear. You should also face the feed line down as the pickup tube is curved and sits in an oriented fashion with the feed line.

Make sense?

In the pic below, the big braided line is my blow off safety valve line.

Click here for a view of the orientation.

 

so the bottle is best with the feed line (valve) in the 6 o'clock. thanks

 

Yes, as long as the valve is pointing toward the front of the car.

 

got it in there now in the tire well. looks good.
thanks all.