Injen CAI SP series

[SilentPlague]

Hey everyone,

I'll admit, I'm pretty new to all of this and I just wanted other enthusiast's opinions on the matter. I've been reading through the forums about SRIs and researched CAIs before I came across this:

It's going for $209.00 on http://www.good-win-racing.com and I wanted to see what other people thought about it before I decide on purchasing this or CS's SRI.

Any feedback or advice would be awesome. Thanks.

 

[Racebrewer]

Hi,

In General and IMHO:

CAI's when properly designed can boost power a bit more since the length can be tuned to put power where its wanted.

SRI's have better throttle response since they aren't moving as long a column of air.

CAI's may put the filter in a dangerous area and can "lock" the motor if they suck up large quantities of water. (Stay on the road Dammit....)

SRI's inhale hot air unless they have some sort of cold air feed. Cold air gives about a 1% power boost for every 10 degree drop in temperature, IIRC.

I have a CS SRI and like it. Adds a little zip and has a nice sound. Need to build a cold air feed.

John

 

[Replica]

Intakes generally don't do a lot. The only reason I'd consider one is for a little better throttle response and being able to hear the engine better so I know when to shift. At $200, I don't know if I could justify it.

 

[SilentPlague]

lol. Yeah every time I hear people talk about sucking up water into their engines with their CAI's, I can't help but think "wtf? Are you guys driving through rivers or something?"

Thanks for the insight. I didn't know about the 1% power boost:10 degree ratio bit.

Would you say that the cooler air a CAI takes in can accommodate for the slightly slower throttle response a SRI has?

 

[SilentPlague]

Intakes generally don't do a lot. The only reason I'd consider one is for a little better throttle response and being able to hear the engine better so I know when to shift. At $200, I don't know if I could justify it.

Maybe it's because I haven't looked into it as much, but is $200 too pricey for a CAI?

 

[Chris_uk]

YES and they charge you extra for a heat shield and also charge you for a hydro sheild, tbh if more intakes were on the market prices would not be so high, as it is there is really only this 1 and CS one

 

[SilentPlague]

YES and they charge you extra for a heat shield and also charge you for a hydro sheild, tbh if more intakes were on the market prices would not be so high, as it is there is really only this 1 and CS one

Thanks for the insight.

Yeah, I noticed there really isn't much of an option when it came to intakes fir the M2.

 

[Camshaft]

I have it on good authority thay Takeda intends to make a CAI for the Mazda2.

 

[SilentPlague]

I have it on good authority thay Takeda intends to make a CAI for the Mazda2.

Nice! Do we have an ETA and price range for it yet?

 

[Racebrewer]

"Intakes generally don't do a lot" Fairly true. HP is about $30 to $40 no matter what you do<LOL>

IMHO, a half-way decently designed intake gives perhaps the best bang for the buck - depending upon the original design of the intake on the car. An AEM CAI on my 1998 Civic made a nice difference boosting power just after VTEC engagement. Intakes (except for a Big Buck Mugen) never made much of a difference on the Acura Integra Type R.

The Mugen, btw, was a SRI with a vague filter mounted in an air box fed by cold air from a wheel well. A fairly complex design that is hard to replicate in the tight confines of a Type R.

I made my own SRI on a previous car and you can feel the differences as you change the length. Too long and it flattens out on top end. Too short and it winds up slowly and then screams at upper RPM (fun but actually slow).

Ideally, if you could build a trombone like intake that would change length with RPM you'd be golden. A nice bellmouth at the filter intake transition would also be nice. Put that in a cold air box.......

John

 

[SilentPlague]

"Intakes generally don't do a lot" Fairly true. HP is about $30 to $40 no matter what you do<LOL>

IMHO, a half-way decently designed intake gives perhaps the best bang for the buck - depending upon the original design of the intake on the car. An AEM CAI on my 1998 Civic made a nice difference boosting power just after VTEC engagement. Intakes (except for a Big Buck Mugen) never made much of a difference on the Acura Integra Type R.

The Mugen, btw, was a SRI with a vague filter mounted in an air box fed by cold air from a wheel well. A fairly complex design that is hard to replicate in the tight confines of a Type R.

I made my own SRI on a previous car and you can feel the differences as you change the length. Too long and it flattens out on top end. Too short and it winds up slowly and then screams at upper RPM (fun but actually slow).

Ideally, if you could build a trombone like intake that would change length with RPM you'd be golden. A nice bellmouth at the filter intake transition would also be nice. Put that in a cold air box.......

John

lol I'd love to see someone build that trombone design. That'd be hilarious.

 

[Axela05]

lol. Yeah every time I hear people talk about sucking up water into their engines with their CAI's, I can't help but think "wtf? Are you guys driving through rivers or something?"

Try driving in Florida during constant torrential downpours and you won't laugh. I used to laugh it off myself as well until it happened to me in my old Mazda3. I had a Fujita CAI, went through a deep puddle because I couldn't see how deep it was while pouring and sucked quite a bit of water in. luckily I realized it immediately and drove 35mph all the way home. The shop said the water luckily stayed at the bottom and never got in my engine. A new dry cone filter and a new MAF fixed everything but I eventually switched to a SRI and swore never again would I buy a CAI.

 

[SilentPlague]

Oh s***. Sorry to hear that. Maybe I'm just not used to getting rain too often here in CA. At least you managed to save your engine.

 

[Suddueth13]

lol I'd love to see someone build that trombone design. That'd be hilarious.

Mazda used an electronically controlled variable length runner intake manifold on the 787B's R26B 4-Rotor engine, power went anywhere from 700-900 and it could wind up to 10,500rpm easily.

 

[Racebrewer]

You'd need a device to read RPM and a microcontroller to operate a linear electric motor to change the length of the intake with RPM. A perfect task for a 12 year old..........

 

[Camshaft]

Nice! Do we have an ETA and price range for it yet?

The last time I spoke to them they were still on the hunt for a development vehicle. Nice opportunity for one of our SoCal members.

 

[SilentPlague]

The last time I spoke to them they were still on the hunt for a development vehicle. Nice opportunity for one of our SoCal members.

Well, sign me up and get me going. lol. BTW, I decided to get the injen sp series CAI and installed it today. I could definitely feel a difference.