turbos and nos

i was wondering what the pros and cons are of each system. i hear you cant use both systems, and i was wondering why that was.

NOS is a brand. Nitrous Oxide is what it is really called. You can use both yes. Turbo spools air into the engine making air to compress, the nitrous oxide reacts and gets really cold...making air denser...You can use both systems, its not too reliable you can blow the engine pretty quickly if not installed well and if the engine cant handle it and its not reinforced.

yea i know nos is a brand....but its also its common name for nitrous. i was looking at some Nitrous Express set ups. i just want to really look into info on nitrous injection systems before i sprang for it. right now i have a turbocharged 96 civic EX....soon to be skyline in august. i want to keep the civic as a race car. i do some races up here but i wanted look into nos and what its good uses would be. i put a turbo in, and i didnt really look into that....which is why im trying to find info on it now.

if you want to race your civic then jsut keep teh turbo and build the engine to handle more boost. Thats assuming your talking about track racing ( i hope you dont want to drag race a civic). if you want to add nitrous to a turbo set up you will need to build the engine anyhow, and you will end up with more gains from running just the turbo without as much chance of detonation.

There is no reason that you CAN'T run both but it is kind of impractical unless you are drag racing.

The drawbacks of a turbo system is that every part in your engine will have a slightly shorter life span, but assuming you know your way around an engine it will be easy to spot problems and fix them cheap before they become expensive problems. Another draback is that if you try to run too much boost you could have preignition or detonation wich sucks bad. These can be easily prevented by increasing the amount of fuel in the mixture, retarding the timing a little, and/or intercooling.

the drawbacks to a nitrous system is that people with turbo or superchargers will make fun of you for not knowing about cars. you will only have part time power and when the bottle runs out, no power. there is still a chance of detonation because you are increasing the oxygen ( nitrouse is 33% oxygen while the atmosphere is like 20% or something) in the mixture and therefore could run lean. if you run lean you may not detonate but you will increase engine temps and thus shorten the life span of many of the parts.

i am going to rebuild the engine so i can handle as much boost as possible. im going to port and polish an integra type-r head with JDM ITR cams and AEBS cam gears, while the cylinder head sits on a JDM b18c bottom end.

yea i know nos is a brand....but its also its common name for nitrous. i was looking at some Nitrous Express set ups. i just want to really look into info on nitrous injection systems before i sprang for it. right now i have a turbocharged 96 civic EX....soon to be skyline in august. i want to keep the civic as a race car. i do some races up here but i wanted look into nos and what its good uses would be. i put a turbo in, and i didnt really look into that....which is why im trying to find info on it now.
Do you call Pepsi Coke? Do you call Tylenol Aspirin or Advil?

ask any racer up in my area...all call it nos. because thats pretty much the term...n2o nitrous dioxide. nitrous....break it into a slang term and you come up with nos.

ask any racer up in my area...all call it nos. because thats pretty much the term...n2o nitrous dioxide. nitrous....break it into a slang term and you come up with nos.
Dude, don't even represent the Northwest like that. We are not a bunch of ricers. None of my friends call it nos, none of their friends call it nos, only the fucking ricers call it nos. It's either NITROUS or N20. You wanna give it a slang term, we use laughing gas.

Heh. "NAWS" Rofl..
N.O.S. is an acronym for Nitrous Oxide Systems-a division of Holley Corp. Makers of fine induction systems for REAL hotrods for years.
The boost you'd get from nitrous is about the same as you'd get with a turbo (provided you've lowered your compression ratio and adjusted your timing to avoid the inevitable detonations that bust holes in your pistons.
That damned FnF movie...screwed up every kid's head, it did.
(HELLOOOooo! It's FICTION!)
Nitrous was first used by the German Luftwaffe in their fighter aircraft because of the inherent mixture problems at high altitudes where oxygen is not that abundant.
Nitrous is a non-flammable gas (NON-FLAMMABLE-I don't care what Vin Diesel says-get over it!)
that breaks down into it's basic elements when it comes into contact with temperatures at or above 565 degrees F, such as encountered in the combustion chamber.
Because the resulting oxygen is much denser than the outside air-it enables the addition of additional fuel to that same incoming charge to the combustion chamber. (gotta keep that ideal air/fuel ratio at about 14.7:1, you know) making-in effect, a bigger bomb in the same space.
The extra oxygen also has the effect of raising the compression ratio-as does the inert nitrogen (space-filler)-causing detonations that can beat the hell out of your engine (head gasket/piston surfaces, etc.)making timing mods necessary to lower the chances of this happening under boost conditions.
It wasn't until the late 60s-early 70s that Smokey Yunick-renowned drag racer- started using nitrous on his cars that it became popular with racers.
Turbos have come a long way since the early days-they're quicker and more dependable now.
Turbos will give you the exact same boost as nitrous will. You still have to add the extra fuel/lower compression/adjust timing for the same reasons.
The secret to good turbo operation is the wastegate operation. (or "dump valve" or "blow-off valve" as ricers are wont to call it).
It needs to do it's thing to keep the boost pressure from 'stacking' in the turbine vanes-slowing it down and negating the boost effect and increasing lag times.
The wastegate should open immediately upon throttle release to keep the turbine spooling at a high rate so it's already at an optimum speed for the next boost in a higher gear.
Turbos, in my opinion are the best way to go because they work on engine demand. You will not overpressurize with a turbo (barring some wastegate malfunction).
Most nitrous users only have a half-assed idea of what they're doing when they install a kit-hell...most don't even understand the gas itself, much less the physical principles of it's proper use.
Nitrous is not magic. It's pure physics in action.
Nitrous by itself is detrimental to the process of running an internal combustion engine-it just leans out the mixture and raises compression ratios without the extra, precisely metered fuel addition and timing compensation to go with it.
(14.7:1, remember? Anything less/more and it runs like crap, dig?).
Nitrous AND a turbo is like pinstriping your chrome...it looks really cool, but is kinda pointless. They both do the same thing.

Three_Fingers, a few notes:

Nitrous doesn't increase compression ratio, it increases cylinder pressure and therefore the risk of knock. Peak pressures tend to be higher with nitrous than with turbo since nitrous tend to increase combustion speed.

You are mixing up the wastegate with the bypass valve (aka dump valve and blow off valve, the first name also implies that it dumps the air rather than recirculate it).
The wastegate was the breakthrough in turbocharging of gasoline engines, this was done at the senventies. The wastegate bypasses exhaust past the turbine and control the boost this way.
The bypass valve came later, what it does is that it protects the turbochargers compressor from surge.

For maximum power an engine needs an air/fuel mixture (with gasoline) that is 12 to 13:1 rather than 14.7:7, this doesn't mean that more fuel can be burned just that it will burn better with this ratio.
For maximum efficiency a leaner mixture should be used and for the catalytic converter to work 14.7:1 must be maintained.