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Old 04-24-2008, 06:45 PM   #1
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Default Nitrous question

Just wondering what kind of supporting mods are needed to have nitrous?
Specifically, this one of course: http://www.zzperformance.com/grand_p...ts1.php?id=462
And why choose a dry shot over wet shot or vice versa?
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Old 04-24-2008, 09:52 PM   #2
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Default Re: Nitrous question

To be honest, I've never seen this system in action before. Reading through the liturature, Zex really doesn't spell out how it is doing the fuel, but I'm thinking they are playing with injector pulse widths between the PCM and the injectors. (This is just speculation on my part based on looking at the kit components.)

As far as supporting modifications... None if you choose. The kit'* output levels are pretty mild. If it works as advertised (automatic A/F ratios, delayed injection until Wide Open Throttle, monitoring bottle pressures) then it should be quiet harmless to the motor.

I have a personal schism regarding dry nitrous systems. I just don't trust them on the fuel delivery side. I like the ability to plug a fuel jet in to match up with the nitrous jet to get the right ratio of fuel and oxidizer. People use dry systems successfully, so it is probably all in my mind, but I'm old school and like the wet manifold systems.

Before you go to the bottle, you should make sure your transmission and driveline parts are in good shape, add an aux cooler to the transmission if you haven't done so already. (The transmission is going to feel the hit the hardest.) Also, you will run high octane pump gas and colder spark plugs. This means the plugs will be more apt to foul on normal driving, but keep an eye on them and clean them regularly.

What destroys engines running nitrous oxide is detonation (too much ignition advance, too lean a mixture, too hot a spark plug) and ham-handed application of the bottle (hitting the bottle in first gear off-idle) That adds an extra cylinder or two worth of displacement to the motor at a time when the parts are already under the heaviest loads. Avoid these hazzards with any system you choose and your motor can live a long, healthy life on the bottle.
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Old 04-24-2008, 11:31 PM   #3
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Wow thanks for the info that really helps!
What about safety issues, like what if someone re-ends me with a high pressure bottle in the trunk?
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Old 04-25-2008, 03:15 PM   #4
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I had a Zex dry kit that injected at the intake. Works if you use it and install it correctly.

Zex includes a box that taps into your TPS to know when to inject, plus you arm it with a toggle switch.

I could go on and on, but really I'd say go with a professional wet system that taps right into your manifold if you are serious.
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Old 04-26-2008, 10:28 AM   #5
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Quote:
Originally Posted by Shadowfax217
Wow thanks for the info that really helps!
What about safety issues, like what if someone re-ends me with a high pressure bottle in the trunk?
Not much to worry about. Nitrous Oxide is not explosive, it is an oxidizer. Yes, on an impact you could knock the valve off the end of the bottle and vent it into the trunk. You'll probably pick up a dent in the sheetmetal from the valve popping off, and everything will smell like rotten eggs for a while from the sulfur they add to nitrous oxide (to keep people from huffing it for a buzz.) I've never seen a nitrous oxide bottle rupture..they are pretty stout stuff.

The actual explosive you carry around is the 14 gallons of gasoline in the tank under the trunk. In a collision, it usually fairs pretty well (except for a few Ford Pintos out there )

The biggest risk you face personally from handling Nitrous Oxide is Frost Bite. Wear gloves when working with the feed lines as they get cold if you have a leak in the fittings. Also wear safety glasses when working around the lines (much the same kind of warnings you would hear if you were working on the pressurized Air Conditioning lines.)
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Old 04-28-2008, 07:50 PM   #6
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Quote:
Originally Posted by Allmachtige
I could go on and on, but really I'd say go with a professional wet system that taps right into your manifold if you are serious.
Do you have any suggestions or links of some? Or are you still talking about a Zex one?

Thanks for the help guys.
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Old 04-28-2008, 09:55 PM   #7
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Quote:
Originally Posted by Shadowfax217
Do you have any suggestions or links of some? Or are you still talking about a Zex one?
I don't think you will find anything right out of the box ready for your intake manifold. In a wet manifold system, you take one or more fogger nozzles and install them in either the duct work (not really a good idea) or have the lower manifold drilled and tapped for them. It'* not hard to do. You can go with a single/double nozzle in the flange behind the throttle body, or six in the intake ports.

The actual plumbing is steel tubing with double flares. If you find any hydraulic shops in your area, they can hook you up with the tools to flare and bend tubing, along with the AN style fittings that will let you rig up the solenoids to the nozzles. A single nozzle arrangement is the simplest setup.

Really, Nitrous Oxide injection is easy to rig, even for someone new to the stuff. A simple "Universal" fogger kit from NOS (or any other supplier) will give you the basic components (Bottle, feed line, Solenoids, switches, nozzle, jets, and wiring). A couple of hours work and you'll have a wet manifold system installed.
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Old 04-29-2008, 02:45 PM   #8
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Quote:
Originally Posted by Shadowfax217
Quote:
Originally Posted by Allmachtige
I could go on and on, but really I'd say go with a professional wet system that taps right into your manifold if you are serious.
Do you have any suggestions or links of some? Or are you still talking about a Zex one?

Thanks for the help guys.
I'd go with NOS. Zex is beginner equipment and is has limited functionality.
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