GlacierFreeze

I was wondering how a nitrous build up of an engine would differ from a turbo setup(probably not too much different). I know you have to upgrade fuel, but I was wondering about other things like:

1. Compression: higher or lower? (stock 9.5:1)
2. Cams: heard higher exhaust was better
3. Inter/Aftercooler? Don't think so...
4. Ignition System, I know you need a better one.
5. Sleeves, rods, pistons, I know.

Can anyone come up with anything else besides those that you would need for a 150+shot nitrous setup?

Kreator

Umm i'm not much of a nitrous junkie, but i'll try being helpful. I don't think you use intercooler with nitrous. On a turbo setup ic is used to cool the air that gets heated up by the turbo. You don't have that with nitrous. As for ignition system, most people use MSD 6AL which is i think a very good setup.

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transient

Nitrous will actually make your air charge cooler because of the release of nitrogen during combustion.

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Jeff240sx

Piston compression should be kept the same. The ignition will need to be switched to a better system. Get an MSD 6AL definatly. The L in that is a rev limiter, which you really want. Also, you'll need plugs that are about 2 steps colder than stock.
You'll need a helluva fuel system. Talk to JWT about the setup though. They have an ecu-controlled nitrous system.
Rods are not necessary, and there are no sleeves in the KA.
Just call JWT (number is at www.jimwolftechnology.com)
-Jeff

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GlacierFreeze

What about an exhaust? Should it be less restrictive like 3" piping (which I doubt) or lower like 2.25"ish? Downpipe/Gut Cat.?

Also, since you aren't supposed to use nitrous for more than 10-20 seconds at a time, what causes you to have to wait, lots of stress? and how long should you wait to use it again?

Jeff240sx

Exhaust should be NA... like a N1 system or my favorite 2.5" exhaust, the 5zigen Fireball system.
You have to wait to use nitrous because it burns extremely hot, and heats things up fast.
You don't have to worry about "how long do I have to wait" because a 150shot on a 240sx will take it to an 11.2second quarter mile. So, a 10second burst and you're going 120+mph. You won't use it anytime soon after that.
-Jeff

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GlacierFreeze

I'm not an idiotic type of driver/racer, so I would most likely neeeever do this, but let's just say I cut the speed limiter and took my 150-shot on the highway. I wait til I hit my last gear and spray for a 15-20 second burst. I have no idea what my top speed would be, let's just say 145ish mph (hypothetically speaking). Would my car start to slow down after I stopped spraying because of my low hp stock engine setup (not stock, but you know what I mean, "not always there power")? I'm guessing it would because of the lack of power.

Yeah I know that a turbo would be better in this situation, and nitrous is mainly for 1/4 mile runs.

A nitrous setup just popped in my mind one day, figured I'd research it some, but I'll most likely still get a turbo setup.

Jeff240sx

I don't care what you do.
Do not spray for more than 15 seconds. Do not spray time after time. It's too expensive and too dangerous.
You won't hit 145mph on nitrous, and if you spray untill you get there, your motor will be hurting. It's not something to play around with. It's made to allow a car to run in stock or basically stock form, and then have a "surprise" for people on the street or at the track. It's not a turbo-replacement, and don't treat it like one, either in real life or hypothetically.
-Jeff

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GlacierFreeze

I was asking if whatever topspeed could be achieved, would the car be slowed after spraying.

Jeff240sx

Yea. Not only would it not have enough horsepower to cut through the air and overcome aerodynamic and tire drag forces, but you probably won't have pistons or a headgasket.
-Jeff

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GlacierFreeze

Okay, thanks for the answer....