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Old 10-31-2006, 01:22 PM   #1
SpeedR
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Default Misconceptions about Nitrous and Meth

Meth and Nitrous (n2o) are completely different in how they make power.

Meth is cheep race gas or race gas on demand, it provides some cooling effects but its primary purpose is to inhibit detonation like a race gas, allowing you to run more boost and make more power.

For the cost of a Meth kit you could EZly buy a 55 gallon drum of 101 or 111 low lead race gas.

Nitrous adds cold ass Oxygen and the fuel it needs to burn if itís a wet kit.

Think of it like this:
a wet Nitrous kit is a rocket it brings every thing it needs with it lots of Oxygen and fuel make big power.

Meth just allows you to add more boost with out worrying as much about detonation.

They can complement each other, Meth providing the good fuel needed for more boost and Nitrous but thatís taking a big gamble that nothing goes wrong.

IMHO you are much safer running race gas when you run Nitrous it just eliminates a whole bunch of other potential problems.

You should run good gas any time you are going to make good power.

The thing to worry about with nitrous is it hits all at one time no ramp up like a turbo or supercharger. Nitrous also make much more power at low RPM because it is supplying the same amount of Oxygen and fuel regardless of the rpm. Significantly more Oxygen and Fuel gets to the cylinder at low RPM when the valves are open for much longer times, thatís y you never want to activate a Nitrous system below 2K-3K RPM (depending on the engine).

A 100 shot of Nitrous is no harder on your engine than a 100 extra hp from boost other than the first hit. Thatís Y a lot of big shoot Nitrous cars have multiple stages so they donít hit all at one time. Another way to minimize the hit is to do it later in the RPM rang a 100 shot at 4K rpm doesnít produce nearly the shock that it dose at 2K rpm.

In actuality Nitrous other than the initial shock is EZer on your engine than running a ton of boost because of its extreme cooling effects and its delivery of Oxygen with out the need to super pressurize the engine.

Nether Nitrous or Boost destroy engines, detonation destroys engines and the more power you are making when you detonate the more likely you are to have a catastrophic failure.
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Old 10-31-2006, 03:55 PM   #2
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Good points, but methanol can be bought for about 3.50 a gallon right now which is still cheaper than 110 oct and if you get the leaded you have to worry about 02 sensors. Yea its something you have to worry about if it fails but most of the kits out today with some maintenence are highly reliable such as my snow kit...the combo is definitely a power maker as I pick up over 12mph in my trap with a 50 shot and nitrous on my evo...and I just wanted to add its not the hp that kills motors from nitrous its normally the torque, for 50 hp you are getting atleast 75lbs of torque...on an evo motor I could safely tune for a 100 shot but the bottom end can't take the additional torque that comes with it...
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Old 11-02-2006, 12:49 PM   #3
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Quote:
Originally Posted by SpeedR View Post

For the cost of a Meth kit you could EZly buy a 55 gallon drum of 101 or 111 low lead race gas.
For the cost of a NOS kit you could EZly buy a 55 gallon drum of 101 or 111 low lead race gas.

IMHO you are much safer running race gas when you run Nitrous it just eliminates a whole bunch of other potential problems.

You should run good gas any time you are going to make good power.
.
I'm not particularly arguing any of the points you made....just would like to point out that, while it certainly much safer to run race gas while spraying, now you've brought into the discussion the difference between daily drivers and race/track prepping your car.
I'd be fairly confident saying that most guys aren't prepared to pay the $$ for 110 race gas on a daily basis....at least anyone who does much driving on a daily basis. For the cost of that one drum of race gas (with a meth kit) you can have race gas on demand for a long time....not just until you've run through 55Gals of race gas. In that scenario I'd be buying a whole drum of race gas for every track/HPDE event. The meth kit can get me pretty much the same level of performance for substantially lower cost.

NOS is indeed a huge power adder....but just not the right choice for different applications.

Last edited by BadTrip; 11-02-2006 at 12:57 PM. Reason: Edited for clarity
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Old 11-02-2006, 01:13 PM   #4
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There are NO2 electronics that control the shot very well, rpm based i think, but expensive! Id rather add a no2 shot to a 35r than going to a bigger turbo. For drag racing, 35r with race gas , 114 unleaded, and a 50-100 shot in 3rd gear from 4000-? will get this car thru the traps (auto) pretty good im guessing/hopeing. I also have 50-50 smc kit for dail driving. Im not using meth, etoh and h20.
Will the NO2 increase boost, or is it strickly just cooling and adding oxygen? Also, how much more fueling do you need to add...say a 100 shot? my fuel system is maxed out and im getting a different fp and injectors so it should not be a problem, but curious. Thanks OP.

Last edited by c'dalerider; 11-02-2006 at 03:17 PM.
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Old 11-02-2006, 03:56 PM   #5
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The boost control should still hold the boost where it's set, but in some cases n2o will make the boost go up.
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Old 11-02-2006, 04:12 PM   #6
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n20 in most cases increases boost due to the additional load on the car...at the drag strip on straight meth I hit 23-24 psi while on n20 I can hit 26-27psi...
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Old 11-02-2006, 06:27 PM   #7
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The reason the boost goes up probably has more to do with what's going on with the turbo then the amount of load on the engine. When injecting n2o, the turbo isn't compressing as much air as it was b4 at the same boost, but more exhaust gasses are going through the exhaust turbine and wastegate. If the boost control doesn't compensate for this, or if the wastegate can't vent enough gasses to hold the boost where ya want, the boost will go up.

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Old 11-02-2006, 08:45 PM   #8
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BTW, adding a 100 shot of nitrous is NOT the same as adding 100HP by other means. N20+Fuel burns much, much faster and is much, much more volatile then normal air+fuel. It is more strenuous then a properly tuned high boost engine. Of course, you can lessen this quite a lot if you can tune your engine specifically for the nitrous shot.

And detonation isn't the only thing that kill engines... running them too lean will torch them do to the increased heat caused by running high AFR's. Run too lean, burn too hot, and you can melt pistons (usually the first thing to melt because of their low surface area and poor thermal dissipation properties), heads, etc.
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Old 11-03-2006, 08:54 AM   #9
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Thanks Hippy, Ultimate and Aruis....im lessining my shot to 30-50 i think. Il set my greedy boost ccontroler to automatic so it trys to hold boost to 31lbs when the NO2 sprays, or/AND ill def be tuning very well and safe for this. Im trying to get a back up engine built asap....haha
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Old 11-03-2006, 01:40 PM   #10
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Hi Steve. Didn't know you posted here!

Methanol is 1.17 a gallon at Red Rock Dist. right now! That's what sold me, along with the benefits of the water in the mix. Also if you buy a drum of fuel it stays at home. Methanol can travel with you. Not to mention it is not as expensive nor does it burn when you're not in boost.

I'm shooting for spring time to have the meth kit installed. If it weren't for my AP taking a dump on the dyno, I'd have both maps and be running it now.
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