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Old 05-17-2002, 12:11 AM   #1
Scooby Newbie
Member#: 13506
Join Date: Dec 2001
Location: Maine
97 impreza OBS

Question engine built for nitrous ?

I was just woundering if any one out there is running NOS on a 2.2? if so what should i get redone on my engine ie rods pistons and where did you get your work done. if there are non that did this for a 2.2 what about 2.5? i am sure that it would be similar. i will be yanking my engine in about a month. If it helps i tend to wind on my car abit hence yanking the engine at under 95k
and would like to run mabey up to a 50hp shot of nos
probly would start at a little lower though. any other advice for this 2.2 project other than sell my car and get a WRX....thanks
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Old 05-17-2002, 12:15 AM   #2
Scooby Specialist
Member#: 1170
Join Date: Mar 2000
Chapter/Region: BAIC
Location: San Jose, CA
2005 STi


you dont need internals for a 50shot. get a turbo instead of nitrous.
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Old 05-17-2002, 12:29 AM   #3
Eric SS
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Member#: 1914
Join Date: Jul 2000
Chapter/Region: SWIC
Location: 2014 Q60S, 2016 Chevy SS
2000 2.5RS w/ EJ22T
swap and N20. gone. : (


the 2.2 should hold up fine with a 50hp shot of nitrous with stock internals

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Old 05-17-2002, 01:08 AM   #4
Scooby Newbie
Member#: 13506
Join Date: Dec 2001
Location: Maine
97 impreza OBS


are you guys running nitrous? how much. and for how long/how often. have you done any thing to strengthen your engine?
i mean driving my car at around 3-5k rpms at higway speeds
for the past year seems to have fried my engine... well at least a valve or to. any more specific info would be great. or aleast a direction to go in. i am pritty sure that if i just rebuilt my engine full stock and ran nitrous i would fry it in less than 6 months...
even at only 50 hp shot... am a realy wrong did i just get a bad engine? frome the factory
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Old 05-17-2002, 09:23 AM   #5
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Member#: 16040
Join Date: Mar 2002
Location: NY USA
1998 Impreza RS


sounds like you're already going to be rebuilding the engine. so you might as well make it stronger at the same time. I'd go crazy and do it up as strong as possible. Run crazy amounts of nitrous!
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Old 05-17-2002, 12:14 PM   #6
Section 8
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Join Date: Jan 2000
Chapter/Region: MWSOC
Location: "Like a hyena you are..."

If you want to run silly amounts of naaaaawws , talk to an engine builder, or if you plan on doing the build yourself, talk to the piston house that you plan to buy from. You will need to get stronger piston tops, heat shielding them as well would be good. If you build an optomised nitrous motor is will not perform all that well tooling around on the street, but will unleash the hounds of war when you want to go. It will not be bad on the street, but it would not be as good as a NA build that gets a little squirt now and again, but your ultimate output will be less. Also if you get a really big juice squeezer, you need to worry about your driveline holding up under the extra power.

I would stay away from a hairy chested nitrous motor unless you drag race often, and have alternate transportation if things go wrong. A clogged fuel filter, or tweeked fuel line can put a very expensive, otherwise bombproof nitrous motor 6 feet under faster than you can say "What the heck just happend"??? Alot of nitrous "kits" contain electronic gadgets that will keep this from occuring, but they don't come with a insurance policy either if you catch my drift .


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Old 05-17-2002, 01:44 PM   #7
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Member#: 8225
Join Date: Jul 2001
Location: Corvallis, OR
Default 2 Second Bursts

My nitrous has been in a week so take this with that in mind. I have a stock bottom end daily driver 2.5. I find that I only use the N2O for quick bursts like less than 2 seconds. It really scoots on a 55 shot. I am hoping my stock pistons & rods hold up to this.
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