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Old 01-16-2011, 03:22 PM   #1
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Nitrous questions

For a rookie, I'm looking for some basic facts. You have 2 systems, wet and dry, right? Dry has the nozzle tapped into the air intake(thus causing the air to cool/become more dense) giving better combustion power.

Wet setup involves installing a "Y" splitter ( can't think of the name of part) to have the nitrous delivered into the fuel rail itself. Please let me know if I am incorrect in my assumptions.

Are there pros/cons to either setup, or which would give the better boost during a drag?

Would you need more than just a SRI or CAI to do nitrous or would you need upgraded IM, headers, clutch for mtx,etc.? Could you reasonably do a 25-40hp shot while stock without damaging anything?


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Old 01-16-2011, 03:39 PM   #2
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i don't have any idea, but i wanna see what people say.
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Old 01-16-2011, 03:56 PM   #3
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Actually, a wet system typically involves putting nitrous oxide directly into the manifold.

There are three types, dry, wet, and direct port.

A wet system would give you more punch than a dry. If you're running a stock engine block, I'd be careful. You could easily blow head gaskets, ruin piston rings and throw rods. Compression levels can go through the roof while running N20. You'd probably be better off running a dry system for starters. Dry systems "trick" the MAF sensor into thinking that the car is getting colder air, thus adding more fuel to the cylinder. Then all that oxygen from the N20 is burned, giving you the power. You've got the basic idea.
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Old 01-16-2011, 04:17 PM   #4
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So the direct would be setup to the fuel rail then?

Ok, so if I went with a dry setup for stock, you think I could do a 25 shot?

What would I need to upgrade to prevent failure on a bit higher level, say 50?
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Old 01-16-2011, 04:28 PM   #5
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Yes, direct puts it right into the fuel rail and injectors.

I think you could pull off 25 with a dry setup. (give or take) Just make sure that your exhaust can handle it too; increased pressure = increased heat.
Is your intake and exhaust stock?

I'd look into reinforced gaskets and maybe racing rings... Hopefully the stock rods and pistons can hold up, but I have my doubts. It's hard to say.
Off topic, but my SRT had forged pistons and rods, dumped a direct port on it, throwing out about 80hp, and still ran higher and unsafe compression levels. I never ran N20 after that.
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Old 01-16-2011, 04:50 PM   #6
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You DO NOT want to do a dry system on the Focus

Do a wet system and you will need a tune as well , a tune will be a must to keep the engine safe

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Old 01-16-2011, 04:54 PM   #7
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Quote:
Originally Posted by 1turbofocus View Post
You DO NOT want to do a dry system on the Focus
Why is that? I don't disagree, just curious. That's why I'm a "Focus Rookie"...

I only give previous experience.
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Old 01-16-2011, 04:58 PM   #8
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Due to the Foci's returnless fuel system, you want a WET ALLLLLLLL DAY!!!! You want the fuel mixed in with the N2o to help with your a/f and also the fuel aids in keeping you combustion temp lower than running dry. N2o by mass has about 36% oxygen. Air has about 24%. So right off the bat as soon as you inject N2o into your engine you're going to go lean FAST. GET A TUNE. With a stock engine I wouldn't go higher than 75. Even at that that's a little to the limit. Some guys will tell you that you can run with no tune. You can...at least for awhile. Do it right man. You are already off to a good start by asking alot of questions. Do your research and do it right.
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Old 01-16-2011, 05:34 PM   #9
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Don't get me wrong, I do believe that a turbo would be the better long term solution for money and reliability. However, the upfront $ of a nitrous is less and seems to be less invasive for install.

I would really just be doing it for the " know how" for the car. Just looking to increase all around knowledge. For adding stronger components such a pistons/rods, etc. to handle the higher pressure/compression, that is out of my immediate expertise(although I would love to learn how.

If direct method is a split of fuel and N20 into the fuel rail, I'm just curious how the wet setup would work connecting directly to the IM.

I would def do a tune if I ever attempt the install.
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Old 01-16-2011, 06:39 PM   #10
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you can get an adapter that sandwitches between your fuel pressure sensor and fuel rail. The are NPT ports that will allow you to add fittings to tap fuel.
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