I'm not sure when it happened. Somewhere between the 20th of May and now. I had set up the NEW tank in the car for racing in Memphis at the NFME event, but never got around to hitting the track. I was too busy on the autocross course. Anyway I thought I'd wait until I was closer to home before tying it out on the strip. Well today I was race prepping the car, and when I opened up the spare tire well, the blow down tube was in a different position. (I didn't have it connected to the tank quite yet.)So I disconnected the tank and lo & behold, my filled, never before opened tank was awfully light. No sign of nitrous anywhere. I unthreaded the blowdown fitting and sure enough, the pressure disc had ruptured. Darn. Fifty dollars with of nitrous, gone! Not even one cent of fun out of that tank.

It must've happened either

a) While on the way home, while driving 760 miles back from Memphis.
b) While the car was parked at work, outside in the sun.

I'm thinking B) because I imagine I would have heard it blow, had I been in the car. There was one day, low 80's where I took the car to work and left it parked with the windows rolled mostly up. They were cracked an inch. However it was warm in the car when I got out of work. It soaked in the sun for about four hours.

Sheesh, never leave a bottle in a parked car when it's sunny outside, even if the bottle is hidden behind a panel.

The silver lining is that I now have the opportunity to install my -AN10 blowdown fitting so that the blowdown tube can now attach to the darned tank. However I also know for fact that you can blow 11 pounds of nitrous into the passenger compartment with no apparent harm.

 

I had one blow, i don't know when it did but I'm assuming it had the same scenario as B. I had a blow down on there so no worries for me

 

Been there as well. It sucks. Last year Tony had two full bottles in his car and the heat got to them in the garage. Ofcourse that was 20lbs of nitrous gone..

 

Once I get the botle re-filled, it's going to sit in an air conditioned garage except on race day. Hopefully that day will be soon. There's a full set of race tires here just waiting to be abused!

 

On the plus side, this means no issues getting through tech at the drag strip, since you'll have your blowdown tube installed.