Pure oxygen pump that pumps from a oxygen tank to thr supercharger

[Photon440]

Not at all. With oxygen you don't need compression for it to combust. Just introducing oxygen to a combustible substance with cause ignition.

MOST flammable material won't self ignite with pure oxygen. It still takes a heat source to fire it off, such as the spark striker used with an oxy/acetylene torch. There are a few substances that can spontaneously ignite because they build up heat as they oxidize, but gasoline isn't one of them - it will need a minimum of 495 f. to burn no matter what level of oxygen it's mixed with.

And the materials that will famously catch fire spontaneously, things that oxidize and build up heat faster than it can be radiated away so that they eventually catch fire (oily rags, especially with linseed oil, or damp bales of hay), still take from a few minutes to several hours to catch, not the fractions of a second that would be needed inside an engine.

If you want to experiment and have an oxygen tank, fill a 2 liter soda bottle with 02 and drop various material into it. They'll just sit there, not burning until you add enough heat.

 

[RJRENTON]

MOST flammable material won't self ignite with pure oxygen. It still takes a heat source to fire it off, such as the spark striker used with an oxy/acetylene torch. There are a few substances that can spontaneously ignite because they build up heat as they oxidize, but gasoline isn't one of them - it will need a minimum of 495 f. to burn no matter what level of oxygen it's mixed with.

And the materials that will famously catch fire spontaneously, things that oxidize and build up heat faster than it can be radiated away so that they eventually catch fire (oily rags, especially with linseed oil, or damp bales of hay), still take from a few minutes to several hours to catch, not the fractions of a second that would be needed inside an engine.

If you want to experiment and have an oxygen tank, fill a 2 liter soda bottle with 02 and drop various material into it. They'll just sit there, not burning until you add enough heat.

The exception to is "rule" might be oil.....everything I've read is oxygen under pressure and oil must be kept seperate or run the risk of an explosion, either spontaneous or intended may result.
BOB RENTON

 

[Dodge Bros]

Not “Pure” oxygen. But there are kits called compressed air supercharging. Scuba tanks in the trunk and a pretty interesting diffuser feeding the air into the engine. http://casupercharging.com/

Here is a YouTube video on it. Just need a tank fill station in the race trailer. Lol
Made this SBC go.

 

[RJRENTON]

Not “Pure” oxygen. But there are kits called compressed air supercharging. Scuba tanks in the trunk and a pretty interesting diffuser feeding the air into the engine. http://casupercharging.com/

Here is a YouTube video on it. Just need a tank fill station in the race trailer. Lol
Made this SBC go.

Compressed air is entirely different than compressed OXYGEN, as compressed O2 is usually stored in a high pressure deep drawn seamless one piece steel tank at approximately 2000 PSI. The only significant difference is the size of the storage tank....bigger tank equals more available volume not higher pressure.
BOB RENTON

 

[Mopars & Missiles]

So......... my take on this is that the differences are thus:

conventional Supercharger - compresses air to provide more air to engine, this creates some unwanted heat (less dense A/FR, = loss) in the process, plus creates some parasitic (loss) drag on the crankshaft from turning the Supercharger.

conventional Turbocharger - compresses air to provide more air to the engine but driven by exhaust gases instead of the crankshaft. Once again, creates unwanted heat in the air flow (less dense A/FR, = loss) in the process much like the supercharger above, plus turbos have some throttle LAG time and some exhaust backpressure that creates some loss as well.

This Compressed Air Supercharging (CAS) simply does away with the "onboard" compressing of the air by using pre-filled compressed air bottles. This eliminates ALL of the above mentioned conventional "losses" because those "losses" NOW occur outside of the car/engine when the bottles are being filled at the "scuba" compressor system. And, an added benefit is the "cooling effect" on the air supply coming from the "HI Pressure" source (bottle) at 3300 PSI which is converted to "LO Pressure" 100 to 120 PSI at the regulator for engine consumption which creates a much denser A/FR than would be normally possible.

In Summary, this technology is somewhat like "electric vehicles" being touted as "cleaner and more efficient" than gasoline vehicles as long as you don't include the energy cost and environmental pollution created/caused by the manufacture and disposal of the lithium batteries required for EV's and the cost of the electricity to "recharge" said EV's.

Just my opinion, your mileage may vary.

 

[Photon440]

Using compressed air cylinders as supercharging seems like a rather limited return to me. Air bottles can be quite heavy - your standard size 22 bottle is about 65 pounds empty and won't fit in every trunk. It also holds, at 2000 psi, the equivalent of about 180 cubic feet of air at standard pressure. So, if you're using 600 cfm under full throttle (likely a lot more under pressure) then you might make it for a quarter mile run, but not regular driving or a road race course. And then you need to fill the tank up again.

 

[dvw]

Ask Don Garlits. He tried it long ago. It never worked.. No cooling effect with pure oxygen like nitrous. Think about how much fuel you would need. It would be close to hydraulicing the cylinder.
Doug

 

[TN Mopar]

Ask Don Garlits. He tried it long ago. It never worked.. No cooling effect with pure oxygen like nitrous. Think about how much fuel you would need. It would be close to hydraulicing the cylinder.
Doug

I had to laugh as I read this because that was my first thought as I read this thread
Ask Big Daddy
There isn't much he hasn't tried

 

[zyzzyx]

O.K., we're getting a little crazy here. ANYTHING will become a "fuel" in a pure Oxygen environment.
Period. The Astronauts burned to death on the launch pad in the Sixties when the atmosphere was
Oxygen. Didn't do that again! When you use a cutting torch to cut a piece of steel, you heat the metal
with the torch until it turns orange and starts to Oxidize, and then you depress the lever on the mixer
to let a stream of pure Oxygen flow through the center hole in the tip and the steel actually burns
like a fuel and the stream you see is the remnants of the steel an Oxygen. So, In the scope of what
we are talking about here, When the fuel disappears, the next best material turns into "The Fuel" as
long as it can get up to oxidizing temp. As far as Nitrous Oxide is concerned, is two parts Nitrogen
and one part Oxygen. When you heat it to around 600 degrees, the one free molecule of Oxygen
breaks it's bond with the Nitrogen and supports the combustion process. So, Out of that whole tank
of Nitrous, you are only able to use 1/3 of the contents as Oxygen.

 

[Dodge Bros]

Lol, it is pretty wild to think that guys were even messing with oxygen for drag racing.

From what I recall even CA supercharging has some pretty big limitations on what class’s you could race for NHRA drag racing. I bet Oxygen would be a hole different level of concern.

I think the best part on the CA system is the intake temp drop going from high pressure to low pressure that it provides on that system, really dense cold air. Engines respond to the increase density of cold air and increasing the mass flow rate by those means. NOS cool’s the air a bunch too, much less than the compressed air set up though. The Hellcat intercooler uses refrigerant from the A/C system to cool it’s air charge, pretty ingenious. The efficiency and temp change thru superchargers, turbines, and cooler set ups really can designs apart.

One of the OEM companies in late 60s did a CA supercharger set up that had a pump and a smaller air tank that it’s intent was for short burst of speed like passing. I think it was more to make a lower power engine more speedy for short bursts, can’t remember for sure but it might have been on a OHC 6 cyl Pontiac.

FWIW.. The guys in the CAS video were using 2 carbon fiber scuba tanks, probably closer to 30 lbs a tank and 3300 lbs psi. I think it would be cool to have short bursts of power like that if a street engine had a small pump on the engine so you could have power on demand on some occasions. That sounds fun.

Here is a motor trend article that mentions some of the early compressed oxygen drag racing efforts and early days of NOS. Be interesting what could be done with it today with direct injection and oxygen. Mixing the gas with the O2 in the intake I bet made some pretty good fireballs back in the day. Lol
https://www.motortrend.com/news/the-first-drag-racers-to-ever-use-nitrous-oxide/amp/

 

[Photon440]

O.K., we're getting a little crazy here. ANYTHING will become a "fuel" in a pure Oxygen environment.
Period. The Astronauts burned to death on the launch pad in the Sixties when the atmosphere was
Oxygen. Didn't do that again!

No, they didn't burn up again, and revised the way the hatch opened because of that disaster. However, they continued to use pure oxygen on Apollo missions, including the ones that landed on the moon. The internal pressure with pure O2 was only 5psi.

The space shuttle reverted to normal air such as we breath right now.

 

[StrokerSpanky]

If you add just oxygen to the combustion chamber it will get so hot you'll melt pistons AND you will loose a lot of power because the expansion of the oxygen in the chamber as it burns is not much. With nitrogen also in the chamber the heated nitrogen expands WAY more than the oxygen. The expanding oxygen is what pushes the piston down. That's why people run nitrous oxide so you get both.

 

[Photon440]

Nitrogen is not known to expand more than oxygen when heated, according to Boyles Law. Most gasses are similar. There are some people who make the claim that nitrogen actually expands less when heated, but these are usually the guys in shops trying to sell you on nitrogen filled tires.

 

[RJRENTON]

Nitrogen is not known to expand more than oxygen when heated, according to Boyles Law. Most gasses are similar. There are some people who make the claim that nitrogen actually expands less when heated, but these are usually the guys in shops trying to sell you on nitrogen filled tires.

YES...ABSOLUTELY AGREE. Boyle's Law is definitive. #32's premise is based, I believe, that NO2 (aka Nitrous) is added as a liquid under pressure, which when exposed to the low manifold/plenum pressure, is vaporized providing a cooling effect (latent heat of vaporization) to the intake charge. Re the N2 filled tires, this is done to minimize the effect of Ozone (O3) degradation of the rubber component. The N2 filling of the tires is done by the airline's for the same reason plus pressure stability at altitude, should an emergency landing be required. Perhaps its an AD note (Air Worthiness Directive) ??
BOB RENTON