Where does the stock intake pull air from? (Si)

[Ass Turtle]

Originally Posted by Bboy_Burst

from my experience, i felt no gain with SRI. the only gains was the extra loud sound.

The first time i floored it after getting my air intake on, i deffently felt it, before i could not scratch off in third but i can now

[They Call Me TK]

so i've been all over 8thcivic and i've found that cai definitely has better gains than a sri, this is due to basic thermal dynamics. cold air is denser than hot air = more hp. i've actually seen dynos of people testing sri against stock. with a long cool down time the sri intake yields 2whp more than stock, with no cool down and a hot start the sri actually yielded less hp than stock piping, due to the intake being heat socked. the cai intake made more power than stock on a hot start and a cool start. i really don't think intake pipe length has any bearing on throttle lag or hesitation. the stock si piping is a lot longer than any cold air intake. the only draw back with a cai is hydrolock, which will only happen if you completely immurse the filter in water, a bypass or a sri would be better for people in high flood areas. the stock si piping is actually made extremely well. the only bottle neck i see the the stock set up is the resinator. i have seen people here get the M&M setup to delete the resinator. with this setup though you get more air but are bottle necked again by the filter due to the small surface area. now, i've seen some really interesting solutions to the filter problem. nitrousg35 has an enclosed filter where the air box is, m&m scoop, custom cowl induction, soxfan sensor housing and cr-v pipe.. it's a pretty crazy setup to say the least. my question is what makes more power.... aftermarket cai or an m&m scoop with new filter?? and if the m&m setup makes more or less, how much more or less??

[ErichPryde]

most SRI's don't only make 2whp more than stock. If you think this is the case, I can hunt down a dyno where an Injen CAI only showed a single whp gain. does that necessarily mean there wasn't something else going on?

most SRI's seem to gain more like 6-8whp, I've seen some crazier claims on both ends of the spectrum. CAI's seem to gain 8-10 whp. maybe. I've also seen crazier claims on both ends of the spectrum.

I'd say the major downsides to the CAI is accessibility of the filter, and the risk of hydrolock, which should be taken seriously. the downside to an SRI is that it's going to be louder than a CAI and take in warmer air.

[They Call Me TK]

pretty much all i was saying is that cai seems to make more gains than sri. my question is what makes more power.... aftermarket cai or an m&m scoop with new filter?? and if the m&m setup makes more or less, how much more or less??

[Bboy_Burst]

i think intake gains is different depending on what mods you have. in some case, intake gives no gains.

[Flatulator]

Originally Posted by Bboy_Burst

i think intake gains is different depending on what mods you have. in some case, intake gives no gains.

From what I understand, what mods you have done, and in what order you do them, will determine how much more hp or torque a mod will add. If you think of the k20 as having a pool of potential hp to pull from when you let it "breathe" by opening up with new i/h/e, the biggest gains (proportionately to the mod of course) are going to come from whatever the first mod you throw on. As you continue, the pool of potential hp you can unlock via modding becomes less and less. If you just throw on a cai as your first mod, you should see a fairly decent gain. If you installed a cai, however, after you put on a race header and a catback, the gain won't be quite as drastic, since you've already opened up your si quite a bit. This probably attributes to quite a few debates on here with what mods have brought about the best gains when being dynoed because there are so many different combos to bring about the same whp and torque. One dude may say to not bother with the stock intake, it's fine, throw up a rh and cb exhaust instead. Another might say keep your stock exhaust, cat back is worthless if you have a good intake and header already, and so on and so on. As much debate as this brings about, that is also what is awesome about these cars, sooooo many different cool builds to put together, and some pretty damn cool original ideas.

Thanks for this thread Erich, very informative and helpful

[B-Stylz]

The Mugen one has a far superior design. Anyway we can purchase its intake tubes?

[steve58]

Doesnt all this modding in fact cancel any extended warrenties?

[JKinATL]

Originally Posted by steve58

Doesnt all this modding in fact cancel any extended warrenties?

Nope. Per the oft-quoted Federal Law, the only way a modification to the car can 'cancel' or 'void' a warranty is if the problem is directly attributable to the modification. Example: If you install an aftermarket intake and your alternator fails thereafter, the alternator is still under warranty because there's no causative link between the intake and the alternator.

Conversely, if you install an aftermarket intake and your MAF sensor fails, they may be able to establish a link between the two that would void the warranty for the MAF sensor. That specific situation is not very likely to happen, though.

[KidnKorner]

A dealer can't void the warranty, all they can do is deny the claim. For a manufacturer to void a warranty they would have to prove that the car had been involved in motor sport competition, grossly neglected or abused. Those interested can read up on the Magnuson moss warranty act.

As far as the topic originally stated, Honda actually designed the intake so the consumer could hear the "roar" of the higher lift cam profile or "VTEC" sound that everyone loves. Its also why the designed the power band the way they did so all the fan boys can rave about the VTEC kick.

The end placement of the snorkel in the upper fender was for one purpose only and that was because the sound resonates well there.

I recall my EP3's snorkel ending between the headlight and radiator area.

Any intake that draws air from outside the engine bay can be called a cold or cool air intake.

[ASHRAF]

great to know that, if I made a shitty intake system and isolated it, I can sell it as a CAI , not that i'm planning to do it, but it's interesting to know

[shiftyMc.shifterton]

Originally Posted by KidnKorner

A dealer can't void the warranty, all they can do is deny the claim. For a manufacturer to void a warranty they would have to prove that the car had been involved in motor sport competition, grossly neglected or abused. Those interested can read up on the Magnuson moss warranty act.

As far as the topic originally stated, Honda actually designed the intake so the consumer could hear the "roar" of the higher lift cam profile or "VTEC" sound that everyone loves. Its also why the designed the power band the way they did so all the fan boys can rave about the VTEC kick.

The end placement of the snorkel in the upper fender was for one purpose only and that was because the sound resonates well there.

I recall my EP3's snorkel ending between the headlight and radiator area.

Any intake that draws air from outside the engine bay can be called a cold or cool air intake.

thanks for lettin us know that now I can get my third gear fixed without them sayin somethin about my CAI injen. I'd say I feel a good gain from it and it sounds good

[phillosophy]

what's that box looking thing at the bottom of the intake system?

[Xenin]

Originally Posted by phillosophy

what's that box looking thing at the bottom of the intake system?

the resonator.

[phillosophy]

So correct me if I'm wrong but the resonator is one of the factors causing the air restriction?

[Xenin]

Originally Posted by phillosophy

So correct me if I'm wrong but the resonator is one of the factors causing the air restriction?

yes.

[odalV]

Originally Posted by Bboy_Burst

in my opinion, the stock intake provides minimum cold air with good flow. if you have a short ram, its the same as stock intake because its less restrictive, but pulls in more hot air, so it evens out. if you have a cold air intake, its brings cold air and its less restrictive which equals more power.

usually the diff is 1 maybe 2 HPs more for the CAI from the short. something u will not feel and suck lot more water then SRI

[2008habredFA5]

Originally Posted by JKinATL

Nope. Per the oft-quoted Federal Law, the only way a modification to the car can 'cancel' or 'void' a warranty is if the problem is directly attributable to the modification. Example: If you install an aftermarket intake and your alternator fails thereafter, the alternator is still under warranty because there's no causative link between the intake and the alternator.

Conversely, if you install an aftermarket intake and your MAF sensor fails, they may be able to establish a link between the two that would void the warranty for the MAF sensor. That specific situation is not very likely to happen, though.

You can quote me on this, i've called the warranty people for my warranty questions and they said that if i put a Aftermarket CAI and my transmission fails in anyway then it will not be covered under warranty due to the fact that the Aftermarket CAI increased my HP and modified my engine and caused the transmission to fail becuase the the transmission is not designed to handle the increase in HP. If my window regulator breaks or my A/C compressor fails then that is covered even with the Aftermarket CAI. Lowering springs voids just about everything my jaw dropped when he told me...A-Z he had a plausable explantation for every type of failure due to the lowering springs.

[07mugencivic]

nice info

[ErichPryde]

Originally Posted by 2008habredFA5

You can quote me on this, i've called the warranty people for my warranty questions and they said that if i put a Aftermarket CAI and my transmission fails in anyway then it will not be covered under warranty due to the fact that the Aftermarket CAI increased my HP and modified my engine and caused the transmission to fail becuase the the transmission is not designed to handle the increase in HP. If my window regulator breaks or my A/C compressor fails then that is covered even with the Aftermarket CAI. Lowering springs voids just about everything my jaw dropped when he told me...A-Z he had a plausable explantation for every type of failure due to the lowering springs.

they are lying to you. I'd have to see the rationale but that's a stretch- 10 horsepower from a SRI or CAI isn't going to blow a well-built transmission.