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Old 02-25-2008, 09:42 AM   #1
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turbos, superchargers, and ????

i kinda have an idea of how a turbo or supercharger work. and i understand their purpose. to force air into the engine and make the car go faster when the mixture of fuel and air is re-adjusted. why cant someone take a air tank fill it up with a hundred or so psi and regulate the air coming out to 10 and create a fake turbo but do basically the same thing?
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Old 02-25-2008, 09:45 AM   #2
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HMMMM, NOS??????? sounds like it huh..lol
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Old 02-25-2008, 09:45 AM   #3
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thats like nitrous. Im pretty sure if youre going to go to the trouble of having a bottle and jets etc, that youd fill the bottle with NO2 instead of just air.
That and you'd probably have to use scuba air because regular air compressors put slight traces of oil in the air.
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Old 02-25-2008, 09:49 AM   #4
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that would be 1 HUGE tank!
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Old 02-25-2008, 09:52 AM   #5
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nos cools the air too helps fuel mix with air
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Old 02-25-2008, 09:56 AM   #6
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You would need a variable valve that would adjust with throttle too, no reason to over lean your FA mix.. Too lean = bad!
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Old 02-25-2008, 10:09 AM   #7
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Nitrous is used since it is an inert gas; and contains three parts oxygen to every molecule of nitrogen. The sub temperature is a byproduct of compressing the gas and raising the pressure; a good byproduct since a lower temperature of oxygen creates a denser charge.

NOx(x stands for substitutionary)

An air-pressured tank would contain moisture if allowed to sit; plus you would only get a finite volume released into the engine once the valve is opened; maybe a second or two for what could be put on a bike and pressurized safely.

Most performance mods on vehicles are to increase air intake into the engine; since fuel and easily be compensated for by fuel quality, pressure, and lastely independant injector mapping(for vehicles that use a pulse system.)

As for turbo vs supercharger; both have their pros/cons...

a variable turbocharger(fins, not wastegate) would ultimately be the best power gain to cons although price is objective.

Power in chemistry is a relation to heat; 2/3 the heat of the engine is removed out of the exhaust... that's alot of potential waste. That's where a turbocharger installed doubles as a power gainer where a supercharger creates a load on the engine and effects the power output eventually, limiting engine rpm... The turbocharger is also adjustable w a wastegate where a shutter valve could limit maximum output on a supercharger...

Its a matter of preference between a simplified supercharger set up vs a bit of efficiency in a turbo set up, but unfortunately w more problems and headaches... Likewise for happy gas or even a BB kit....
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Old 02-25-2008, 10:45 AM   #8
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^^thats what i was going to say.
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Old 02-25-2008, 10:50 AM   #9
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Old 02-25-2008, 10:50 AM   #10
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Quote:
Originally Posted by bandito View Post
i kinda have an idea of how a turbo or supercharger work. and i understand their purpose. to force air into the engine and make the car go faster when the mixture of fuel and air is re-adjusted. why cant someone take a air tank fill it up with a hundred or so psi and regulate the air coming out to 10 and create a fake turbo but do basically the same thing?
lets see yer' scoot
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Old 02-25-2008, 12:43 PM   #11
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i was going to see if i could do this to a little go cart engine and make it work. that would be wak. obviously i still have alot of research to do. thanks.
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Old 02-26-2008, 03:40 PM   #12
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Its not just air pressure, its air volume..... If infact you really could take pressurized air from a tank and pump it into the engine, the tank couldn't hold enough air to supply it..... If you had a 2" outlet on that tank and you cracked it open, how long would it take you to drain it empty? 20 secs maybe?

The inlet on the smallest turbos are 2". As for comparing compressed air to nitrous.....its not even apples to apples, nitrous is a liquified gas that expands greatly when it hits atmosphere......its regulated and pumped into the engine as a liquid/gas form, as soon as it hits the chamber and is lit off, the oxygen molecules split and multiply thousands of times.....Then you have to add enough fuel to burn all that air.....remember its the fuel that makes power, not just the air....you really need the air to burn the fuel, not the other way around but....

Either of the two will blow up or melt a bunch of if you don't know what you are doing so you better keep researching....

I remember this guy that wanted to use battery powered hair dryers in his ram air tubes.....LOL
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Old 02-28-2008, 01:19 AM   #13
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Quote:
Originally Posted by BoostJunky View Post
hey bandito, been there, and yes the above site will explain alot, plus what these guys are saying. just remember most things come at a cost, actually 2. one is the cost in dollars. the other is always some disadvantage or limitation. at some point it comes down to...why not put a supercharger and a turbocharger, and nos, and a big bore kit...

answer: cause itll take like 5 seconds for the engine to explode! the ratings for all the bearings, seals, and thier ability to withstand usage are all based on STOCK setup, with maybe some extra. so the more you juice the more you risk a failure. you can upgrade some of those components, but your cost goes up and up and up, and you could still have failures.

there is no book to tell you how far you can go and how far you can push the limits before the engine goes ka-plooey (and possibly rider with it) its an ancient mystery that many factories, racing dev. teams, privateers and enthusiasts try to find out.

my theory is....who wants to go eighty kadrillion miles per hour anyways? someday when i grow up (lol) i want to get into custom transmissions, and making use of what the bike has to begin with!!!
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