I have a 10 lb. bottle with about 11 pounds of nitrous in it. Unfortunately it's not equipped with a blowdown fitting so I need to remove the nitrous before I can install the appropriate fitting.

I'd like to sell this nitrous to someone who has an empty bottle at $3.50 per pound. We'll just need to chill your bottle with some dry ice first, which means you probably will need to drop it off here at my house for a few days.

Denny, I know you have a 15 lb. bottle... Do you need a refill?? Do you have a spare -4 nitrous hose that we can use to transfer the nitrous?

 

just run it. Blowdown tubes are way over rated.

 

Open the bottle

 

Andy,
I don't feel like wasting the gas, nor will I be running the nitrous on the street. I can't use it at the track until I have a blowdown tube and I don't feel like trying to sneak it past tech.

I'm going to attempt to move the nitrous from one tank from another, fix the problem, then re-fill it. At this point I will have to wait until next year, anyway. There's too much going on at home so the car's done until winter, when there's a little more mod time. I'll pick away then hit the track with force in May!
Cheers,
--Dan

 

Dan, a simple rubber hose slipped past the blow off fitting with a clamp on it is legal. use it that way for the 3 passes you will get out of the bottle. they dont blow off till 3000psi and that means the bottle is hot as hell.

you will not be able to transfer all of the nitrous using transfer lines. just let someone else use that bottle up if you are afraid of it.

 

When the time is right, buy yourself another 15lb bottle and transfer the juice in the manner you described. I get 4 solid passes on a 15lb bottle @ 200hp so you'll want a second one in the future.

You're really overthinking this one, Dan!! We can trade full bottles in march if you still have this problem then.

 

its hard to get that last bit of the nitrous out of the mother bottle , you will loose a few pounds.Especially with just transfer lines and no pump.

Dan plans on running a 25 shot so a 10 pounder will last him all summer. heh

 

I didn't know you knew me so well! ...'Cept it's going to be a 75-shot. Then if everything (data log, fuel pressure, & spark plugs) look good, I'll ramp up to a 150 shot.

...and I might just do the big, fat heater hose solution as an interim measure since it's becoming clear that unloading nitrous efficiently isn't all that easy. I'm ordering two -AN8 90-degree swivel fittings and 3-foot of braided steel hose, along with a bulkhead fitting so that I have the flexible line blowdown tube ready. Then I might just hose-clamp on the heater hose until the bottle is used up

...and you are probably right Denny, I might be overthinking it. That's just me I guess, Mr. Pedantic

 

Thanks for coming over the other day JakeRobb, and hanging out while I worked on the nitrous system. The blowdown tube is complete, and the nitrous lines are complete. Now it's all wiring that's left. However, me being the overthinker that I am, I've got this super-cool idea for automating the bottle heater circuit as well as the remote bottle opener! It'll all slave off the ignition, a NOS arming switch, and the fuel pump circuit so that the heater only runs when the engine is running (among other conditions), and the bottle opener opens and closes along with the ignition. The circuit is half-way designed already, I just need to figure out the semiconductors necessary for safely switching polarity on the remote bottle opener. The microprocessor is a simple & cheap Basic Stamp 1 solution from Parallax. Even the purge is automated in the design so that I can adjust the pulse width.

 

Draw up a schematic and send it to me Dan, I've been messing around with an idea I've had for awhile and it sounds like you're on the same page as me.

 

I'm going to go to PIC on this one, Joe. The design will control the bottle heater and the remote opener, plus also have some limited control over the purge solenoid. PM me if you'd like and we'll talk about it! I've been researching it tonight, actually. It's going to be cool.