S2000 Naturally Aspirated Forum Discussions about N/A motor projects, builds and technology.

3" or 4" cai

 
Old 12-19-2011, 05:50 PM
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I've seen metal reducing sleeves(made for headers) and silicone reducing sleeves used with great success
http://www.jegs.com/i/Hooker-Headers...rentProductId=
http://intakehoses.com/Merchant2/mer...gory_Code=RSS1
If you have 4" or more of pipe(like b.r.i.a.n. has) after the reducing sleeve the air will be smooth when it hits the T/B

ROD
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Old 12-19-2011, 10:20 PM
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Originally Posted by wadzii View Post
My car and a couple of other s2k's I have dyno'd had very large gains going from a 3 inch cai to a 4inch.

once you start making more than 220hp to the tires a 3 inch intake is simply not big enough. Its way easier to hurt power with an intake thats too small rather than one thats too big.

Also, the air filter makes a difference. AEM dryflow always makes a couple more hp than anything else on the market.
Any proof of this?
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Old 12-20-2011, 02:23 AM
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Any elaboration from wadzii or rrounds would be appreciated
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Old 12-20-2011, 03:41 AM
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[quote name='H22toF20' timestamp='1324365630' post='21250204]
Any proof of this?
[/quote]



Lol 12 years of building and tuning

I dont have access to the dyno i used for most of these tests, but i have tested all sorts of intakes on all sorts of setups and generally the bigger and longer the inyake the better the power. Certian k series setups act weird due to the things you can do with vtc... we dont have thay so its a moot point.
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Old 12-20-2011, 04:57 AM
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That's what my thoughts are. I'm new to Hondas but I'm not new to cars. Most of my cars were turbo cars or v8, but the ideas all the same. Don't choke the motor Let it get as much air as it can take. It's like breathing through a straw will certainly give you enough air, but breathing with an open mouth feels a hell of a lot better.
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Old 12-20-2011, 12:38 PM
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Originally Posted by wadzii View Post
[quote name='H22toF20' timestamp='1324365630' post='21250204]
Any proof of this?


Lol 12 years of building and tuning

I dont have access to the dyno i used for most of these tests, but i have tested all sorts of intakes on all sorts of setups and generally the bigger and longer the inyake the better the power. Certian k series setups act weird due to the things you can do with vtc... we dont have thay so its a moot point.
[/quote]
Now their's mixed reviews about the intake diameter lol
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Old 12-20-2011, 02:41 PM
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In for more info since I am going N/A when I get another S
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Old 12-20-2011, 03:29 PM
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its not about girth its about length

tune the length of the intake to get the desired tq curve
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Old 12-23-2011, 11:07 AM
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Originally Posted by H22toF20 View Post
Brian just tested it. He was nice enough to give me the results but I don't believe he posted it up yet. He's running a 3" into 3.5".
hopefully b.r.ia.n. works his magic and gets the power back

Originally Posted by b.r.i.a.n. View Post
i'm running a stepped intake. the car h22tof22 is talking about was using a straight 3.5 inch intake pipe with no step.
FIXED

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Old 12-23-2011, 11:46 AM
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looks identical to mine. hopefully the gains are there. we gotta plug up those coolant lines too.
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