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Old 08-21-2007, 06:08 AM   #1
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Default Generic NOS questions

1. How does NOS get into the engine? Does it go in via intake?
2. How does it react to intercoolers?
3. I imagine NOS would be a virtual octane increase, so the greater boost wouldn't warrant racing fuel, right?

Well, it wasn't that generic. But I really think the question set pretty much sums up what I'd like to know. I heard some guy put NOS on his 2.4L 4-cyl Alero, stock otherwise, and got it up to some "speeds." A friend'* Dodge Ram truck was NOS'd before he bought it, and it seems fine other than the burned up spark plugs.

I've seen NOS used in those Fast & Furious movies, and as much as I'd like to think that it'* only for finely-tuned imports, it seems to be a pretty cheap way to squeeze out power because it may make an increased effective octane rating and whatnot. Then again, I know people have blown up their cars with NOS boost, but also without it. Youtube, anyone?

I'm not at all considering NOSing the Bonneville, but I'm intrigued by the ideas of higher octane, more boost, and an excuse to add a shiny button to my dash. I've seen people here with it, and it seems not to be made out to be harmful by anyone except a couple of people who don't have it.
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Old 08-21-2007, 06:24 AM   #2
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1. NOS gets into the engine via different kits, dry kits, wet kits and direct port

Nitrous oxide dry injection kits spray nitrous oxide into the intake manifold and it is mixed with fuel and air at the injectors. Dry shots of nitrous oxide usually provide less of a power increase because there is no way of providing additional fuel to balance the extra oxygen in the combustion mixture. So you have to be a little conservative as too lean of an air-fuel mixture will cause the engine to just blow up.

Wet nitrous oxide shots have fuel in them. The nitrous oxide is mixed together with fuel and a fogger injects this mixture directly into the throttle body. This provides the extra fuel to balance out the extra oxygen provided by the nitrous oxide, thus keeping the air-fuel mixture stoichiometric or not too lean.

Direct-port injection, In this system, each cylinder gets its own nitrous injector. For this modification, the whole intake manifold has to be removed and fitted with a custom one.
But this is almost the most effective but also has the biggest price tag

2. Have expert opinion but i dont think it would have any effect on it at all
3. No you dont need racing fuel cause nos is kind of the octane booster

NOS'ing a bonneville
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Old 08-21-2007, 07:18 AM   #3
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Wow, thanks. I guess you'd just have to run rich and throw in NOS until a scantool lets you know things are getting better This is really helpful. You're awesome.
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Old 08-21-2007, 07:53 AM   #4
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Toss Curt Martin a pm on this. He had NOS on his old school Bonne and it'* quite the ride. He has lots of good knowledge about it.

CLM2112 Where are you?
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Old 09-10-2007, 10:43 PM   #5
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I wouldn't mind NOSing my bonny
How much of a speed boost do you get and would a governor restrain it at all?
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Old 09-10-2007, 10:51 PM   #6
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Quote:
Originally Posted by Shadowfax217
I wouldn't mind NOSing my bonny
How much of a speed boost do you get and would a governor restrain it at all?
PCM may get confused. It would take some tuning to make it run right with NOS, at least for it to run optimal. Also with the added power you have a great chance of engine/transmission damage, but as long as you have money in the event it blows something up, go for it. This is the mistake a lot of people make is they throw nos on the car, it blows something up and then they are car-less since they did not have the money for a new motor/trans.

for an ssei, it may be more cost effective to mod it with a pulley/intake/headers/rockers FIRST...and if you arnt happy with the added power from those mods, move on to other things.
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Old 09-10-2007, 11:05 PM   #7
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Haha ok well that'* good.
I wouldn't have the money to fix it if something happened.
I'll just stick to appearance mods then when I'm out of school, I'll start working on it'* performance.
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Old 09-11-2007, 12:40 PM   #8
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Nothing to do with octane, zero, zip, nada.

Nitrous Oxide contains more oxygen than air but, the major effect is cooling. Colder, denser air charge means you can burn more fuel and make more power.

The danger of a dry shot is that the O2 sensor needs to see the lean spike and tell the PCM to add more fuel. At 5000rpm the engine turns 8.3 times in 0.1 seconds; each cylinder has fired 4 times. Too much and engine goes boom.

Cheap? Not really when you start filling bottles.
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Old 09-16-2007, 04:08 AM   #9
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ok quick question how would kr and nitrous get along? and kinda off topic but what exactly is kr i kinda hgave a clue but ive never heard of it till i got this car and i havent quite figured it out
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Old 10-05-2007, 01:14 AM   #10
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I would like to clarify a point Hans brought up. The PCM and its settings have nothing to do with Mild to medium NOS injections.They do not need anything altered. Wet NOS injection adds it own balance of gas and oxygen. It isnt a matter of getting the PCM to change parameters to adjust for NOS. It is getting the NOS and its sister Gas injector tuned together to add power to existing engine function. If your engine is running good on its own and you have the right balance of gas/NOS added, things work smoothly. Most NOS system manufacturers now have this down pat. Although in the case of my N* engine while the 75 HP shot combo works good. Pairing the 100HP gas orifice with the 75HP orifice works even better. You have to let the motor wind up a little more so it doesnt stumble, but the increased torque seems to make it worth it in my case. I can use the 100HP jets together but the need for high RPM NOS engagment becomes critical. From what I've read and understand. the only adjustment requirement for heavy NOS injection is to retard the timing, something I cant do with the N* PCM. And no it aint cheap. I can go through a bottle real quick on the street and its $50 a shot to fill the bottle...... About 10 to 15 redlights worth. IF you dont show off the purge.
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