Fresh Air Systems used on a Funny Car

Can someone tell me what they put inside a simpson fresh air system as used on a funny car, and I have read on this site of people saying they have a filling station to fill them , how is this done.

 

It is just filtered fresh air. The trick is to get around 2 to 3 thousand psi in the bottle that is why you need a filling station, we have 2 larger scuba tanks in the trailer that we can transfer to the smaller bottle with. Doug

 

Hey Willy200,

Yes, scuba tube is the way to BUT I gotto tell you what we did before we got the scubatube...
Check this out...
http://www.fxairguns.com/accessories.asp
Check out the pressure this pump can reach: 250 bars = app. 3500 psi right?

This is a Swedish pump but I`m shure you can find something similar in the U.S. or anywhere..
So the night before the race: Have a couple of beers in the pit and take turns filling the bottle!!! Make friends with other teams, inviting them too!!!
I can GUARANTEE the whole team will have a laugh and all the other teams will think you`re a bunch of complete idiots!!

Works for Lenco as well

Erik

 

this is where you can get all the fittings you need to make your own tranfer tank system
we use a scuba tank, hose and adapters and leave the tank in the car and just refill it there

http://www.breathingair.com/level.aspx?ID=Q6UJ9A00007X&Crumb=LQ6UJ9A00007E

 

all you need is:
-4500# firefighting scba cylinder
-CGA 346 fitting for the on car cylinder (believe these are rated 3000# or less)
-CGA 347 fitting to fit the scba cylinder (3000#+)
-filling whip (as described below)

btw... these fittings should all be available from you local welding/bottle gas supply

typically these adapters have pipe fittings on their opposite end. go to your local hydraulic shop and have them make up a whip with 10,000# rated line and female pipe fittings on each end. 3-4ft long seems to work well. also a good idea to put a t-fitting in the line with a small 3-4,000# gauge on it to regulate/watch the pressures as you fill.

procedure:
connect the bottles together using the whip. open your on-car bottle. slowly open the larger scba cylinder and fill SLOWLY! should take about 5 minutes to fill an empty bottle. when you reach the proper 'full' pressure (either 2216# or 3000# depending on the bottle) close the scba bottle then close the on-car bottle... done deal