924Board.org

[wdb]

Capt EZ , yes it did , Thanks .

[Aegean]

Nitrous is not explosive. It super-cools the engine and increases the amount of gas and oxygen that is injected into the engine. That is why in most cases when you add nitrous to an engine you have to replace the fuel injectors with larger grade injectors, not to mention the fuel pump.

Any questions?FAQhttp://www.nitrousexpress.com/welcome.htm

Propane only acts like "nitro" when injected into a diesel engine not gasoline engines. O2 and propane are both very explosive; yes Capt EZ their explosive qualities increase underpressure because the chemicals are condensed more obviously. Compared to gas, 02 (pure or not) and propane are highly explosive and a back burn to the bottle would be the end of you, your car, and anything around you for a good distance.

If you want a sweet experiment I would say try to set up a NOS system and a supercharger and inject the nitrous into the intake directly before the supercharger, which would in theory, super-cool the super charger as well as the engine. You would possibly have to inject nitrous into the engine as well because the nitrous would be less condensed after passing through the super charger, and warmer.
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79 Porsche 924 2.0L 5-Speed Flowmaster 40

[Richard]

In one of my flying magazines I saw a picture of a racing airplane that used a dedicated five horsepower engine to run a supercharger. I think this is great idea if you've got the room. First, you've got gas on board anyway so no complicated electronics. Second, spool up time is eliminated. Third, with the right bypass you can shut it off and turn it on at will. The problem with the vacuum cleaner/leaf blower ideas is that it takes alot more than 1/4 hp to compress air to any significant value. Even the electronic supercharger mentioned previously is only rated for short duration boosts. Now finding the smallest 3-5 hp gas engine and stuffing it into a 924's engine compartment, that's a challenge. Of course the race airplane can probably afford to ruin a small cheap motor every heat by running it at 5000 rpm!

[1982Porsche924]

hmmmm, what if I run an old gas mower engine with some sort of supercharger hooked up in the back of the car. Then cut a hole in the floorboard and PVC it to the throttle body. I can most likely find a lawn mower engine for 20 dollars, making the actual supercharger would be the hard part.
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1979 Porsche 924 "S"
Engine: Euro pistons, Light Flywheel, Weber TB, Bursch Header, Cam Wheel
Suspension: Front coil-overs, adj sways, Solid bush. Thicker tors. bars, 5-bolt, BBS rims
Body: Fiberglass widebody kit, 931 Nose

[Capt EZ]

WDB,
I'm glad i answered your questions.
Pure o2 isn't any more flamable than other compressed gasses it just burns better once ignited. I may have failed chemistry, but any compressed gas is flamable tosome extent...Think "rapid expansion of a gas.... Period. If not how do nitrogen filled tires explode when the brakes overheat. Nitrogen is supposedly inert.
If all NOS does is super cool the Fuel air charge than why not just run a water methenol system like the planes that race at Reno. Ya know $1m+ per engine...Rolls royce Merlins, 12 cylinder, turbo supercharged, geared bohemoths turning out in excess of 4500 bhp to an 85% efficient prop running at in excess of 450 mph. the last time I checked NOS was limited because of the BANG it makes when it contacts the ground....
given the simplicity of a NOS system and the relative benifits of a non-toxic, non-explosive additive , I would think that the combined civilized world would have siezed upon it as a performance enhancer for military applications long ago.
Just for shits and giggles, don't use any oil based produt in the presence of O2 it has a tenency to erupt into flames from contact of shaving cream, hair spray and many differing type of cosmetics products as well as engine oil, ect.
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Dream as if you'll live forever.
live as if you'll die today. - James Dean

Fly Fast
Live Slow
Margaritaville Airways
1987 924S

[78porsche924]

The NO2 cools the engine like said, the No2 breaks down under the heat and releases the o2. That is what give you the power.

[Aegean]

Yep!

Actually the Nazi's put NO2 on their V12 Meschersmits during WWII
to make them faster... Injecting NO2 into our current fighters wouldn't do anything because it's a jet/turbine engine.

I think the water meth. system would be harder to install than a NOS.

NOS has become popular lately with ricers because it's cheap, works, and is a quick fix for those who can't afford forced induction at the moment. It's been used on drag strips forever.
The only issue with NO2 systems is keeping the bottle temp. stable... which is easily solved with the technology they're selling with the systems today.

What's the mower engine for? LOL
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79 Porsche 924 2.0L 5-Speed Flowmaster 40

[1982Porsche924]

Hook up the 3-4hp lawnmower engine to some sort of compressor type deal, and you got a supercharger. I don't know, maybe I'll just get a 931 and not mess with home made forced induction.
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1979 Porsche 924 "S"
Engine: Euro pistons, Light Flywheel, Weber TB, Bursch Header, Cam Wheel
Suspension: Front coil-overs, adj sways, Solid bush. Thicker tors. bars, 5-bolt, BBS rims
Body: Fiberglass widebody kit, 931 Nose

[Aegean]

Get a real supercharger, I'm sure you could pull one off something at a junk yard and easily stick it on there? Might have to go through the internals and get a cam but it'd spank a 931 probably. Continuous power Heh heh
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79 Porsche 924 2.0L 5-Speed Flowmaster 40

[78porsche924]

Where is the fun in doing it the right way. Makes the car seem so much faster when you ghetto rig. That and it is cheaper and more fun to do. That and you can say you beat someone in a race with a lawnmower engine under the hood.

[Aegean]

The right way works...the wrong way blows you and the german engine up. And doing stuff the "ghetto" way just makes you ghetto.

I'm not racist but you'd be negroizing your car... no rice.

Supercharger from a junk yard, strap it on there... duct tape it on there if you want something different. Superglue is cool!
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79 Porsche 924 2.0L 5-Speed Flowmaster 40

[78porsche924]

If you read his first post, he said a beat up honda. And so what if it is ghetto, my 924 was the most ghetto POS when i got it. I still loved it though. Plus you would not have fun destroying a honda?

[Aegean]

LOL wow... nuke the honda not the porsche
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79 Porsche 924 2.0L 5-Speed Flowmaster 40

[78porsche924]

I would straight kick his ass if it was a porsche, but i would give him a medal if it was a honda.

[fielderd]

ok guys, here it is. nitrous oxide (n2o) is an oxidising agent, as is o2. they readily support combustion however are not combustable themselves. this means that the flame path inside the cylinder is a lot quicker and combustion is more complete then burning in air.

because NOS is pressurized it is in liquid form, thus when injecting the pressure reduces to intake manifold pressure and it vapourises absorbing heat from surroundings. It does not, however supercool an engine.

superchargers take a lot of power. for an ideal system (flowing) the power consumption in watts = -v x dp. which is the integral of pressure change vs. volume. and remember this is assuming 100 % compressor efficiency.

These things are not easy to understand so i will not attempt to explain them, a supercharger that draws 3 hp will give minimal boost for a car engine.