What is the easiest way to tell how much nitrous is left in the bottle. I know pressure doesn't mean much because you could just have air left in it. Is there an easier way besides pulling the bottle out and weighing it??

 

nope

 

Pruging it will let you know if it is empty or not. If you can see it pruge then it still has some left in it. If you just hear it and don't see the fog then it' empty.

 

Well, there is actually one thing you could do, but I have to warn you... it's not very precise and it won't work at all if you're tone deaf.

Find something to use as a hammer, perhaps a 6" long socket extension or a piece of bar stock of similar size. It doesn't really matter what you use as long as you use the same item each time.

Lightly tap the bottle in the middle to create a ringing sound. The tone of the ring will be different for full, empty and half full. If you get used to what each sounds like you'll be able to make a pretty good guess as to the general fullness of the bottle.

Please note that if you have a blanket, heater or any other thing wrapping the bottle that would tend to dampen and dull the sound, you must first remove it.

 

to early for me to be reading

 

And this is related to my post how...?

 

I read your post wrong myself

 

No problem.

 

I use a small scale for weighing the bottle. On a 10lb bottle, depending on the size of the shot, say a 150 shot, after 5 or 6 runs you are going to be noticing a difference in performance. I went with 15lb bottles in case I have to hot lap the car for the next round.