AEM><INJEN....(intake)

[le_ryan]

do u perfer AEM.... ....INJEN...or other, and why,the brand with the most votes is the intake i will be installing onto my 91 240sx KA.

[InsanityInc]

AEM. Cheaper, K&N filter. Difference between the SRI and the injen CAI have been shown to be nil on a dyno. Probably because of the amount of extra piping needed for the CAI.

[aesic]

Wouldn't the dyno results be a little off because on a dyno, there is no air rushing by the car? The CAI won't get the cold air, and thus you wouldn't see the difference or its benefits unless on the road. Just a thought.

-aesic

[USDM240]

any aftermarket intake unless made of plastic, isnt going to make any more power than a cone filter and adapter setup. the reason for the this is heat absorption. the metal piping of an AEM or Injen intake heats up much more than the stock platick/rubber pipe.

my $0.02...i actually lost a few hp after installing my Injen.

[aesic]

any aftermarket intake unless made of plastic, isnt going to make any more power than a cone filter and adapter setup. the reason for the this is heat absorption. the metal piping of an AEM or Injen intake heats up much more than the stock platick/rubber pipe.

my $0.02...i actually lost a few hp after installing my Injen.

What if you wrap it in heat wrap?

-aesic

[InsanityInc]

Wouldn't the dyno results be a little off because on a dyno, there is no air rushing by the car? The CAI won't get the cold air, and thus you wouldn't see the difference or its benefits unless on the road. Just a thought.

-aesic

They put a very large fan in front of the car when running it on a dyno, enough to simulate airflow. Since if they didn't, your car would overheat.

And increased heat absorption isn't really an issue because your intake charge is WAY hotter than your underhood temperature, by a few hundred degrees. Hell, if anything, the increased conductivity will probably slightly cool your intake charge.

[Tulsa_S-13]

USDM240, Aluminum does absorb heat very quickly, however I disagree with you on the air heating up so much that there is actually horsepower loss. Granted that the air does heat up slightly I don't believe it is in the intake tubing long enough to actually heat up substantially. It's kind of like sliding ice across a hot surface for a short period of time, yes the ice melts slightly but not enough to make a big difference.

And I wouldn't say the piping heats up much more than plastic, it heats up quicker than plastic.

[le_ryan]

6 posts......3 votes.....come on people..and it doesnt help that its a tie right now......please vote your prefrance, it will help alot.....thanks

[:: orion ::]

"The power is in the pipe"

AEM = 2.5", Injen = 2.75"

What's better for YOUR setup...? Depends on the level of modification.

...but a cone filter is no better than a K&N drop-in filter.

See here - Cone filter versus cone filter + Injen intake pipe DYNO:



- Brian

[240marcuSX]

man thats a pretty nice gain for just a piece of pipe, i thought that the stock 240sx intake piping was pretty decent already. perhaps ill look into getting a injen pipe, do they sell just the piping without the filter?

[All_Motor_KA]

The stock pipeing is FAR from decent. Very very tiny to say the least. I bought an ebay intake and I dropped in a K & N cone filter on it. Works great and was pretty cheap. As far as AEM vs Injen, I've always heard pretty good things from Injen so I would prolly choose them.

[Kenrik]

your telling me I can get like 4hp just by changing out the stock plastic pipe?!?! I did not think I would get any gains except looks...

[le_ryan]

wow ! just what i needed, specs!, thanks for the diagram!...im definatly in the direction of INJEN.......thou it would be nice to see an AEM diagram....well its still tie game.......need more votes

[InsanityInc]

"The power is in the pipe"

AEM = 2.5", Injen = 2.75"

What's better for YOUR setup...? Depends on the level of modification.

...but a cone filter is no better than a K&N drop-in filter.

See here - Cone filter versus cone filter + Injen intake pipe DYNO:



- Brian

Ehhh. That seems to imply that they replaced the stock intake and airbox/filter with the injen system. Not just the pipe.

[JimmyMethod]

Stock intake = restrictiveStock piping = restrictive

[sunnys14]

theyre both the same to me

[ians-ka]

i would go for the aem myself, i have it. the dynos on the aem intake are showing 8 horses over stock and 10 ft-lbs. it has to do a lot more with removing the stock pipe with the baffles and eliminating the resonator box under the stock pipe more than anything else. but the obvious increase in pipe diameter doesn't hurt either.

[:: orion ::]

Ehhh. That seems to imply that they replaced the stock intake and airbox/filter with the injen system. Not just the pipe.

The dyno notes do imply that...but if you read the article (or the series of 4 articles on this car), you'd see that they put on a cone filter as their first mod.

www.KA24DEvelopment.com/dyno_charts.html - Look for "Installment 1", and it shows what they did first.

...

And the quote "the power is in the pipe" comes directly from that issue of SCC.

- Brian

[le_ryan]

im gonna let the poles run a little while longer, just to see how well INJEN does , ill choose the winning brand on the 20th on staurday

[Scooby24]

Is 4hp gain and 4 ft. lbs REALLY worth the 150 bucks or however much for an Injen?

Just buy a cheap ebay intake.

You can't even feel 4hp.. and that's good for MAYBE 5/100ths of a second in the 1/4 mile.

[cyrus240sx]

yeah... i bought a cone filter and an adapter and popped it on my stock intake... seems to work fine... in reality intakes arent worth the money.... put that 150 bucks into something usefull like a nismo power brace or towards the beginnings of a turbo kit/swap etc

[Bigvinnie]

I think in my opinion that if you use the 2.5" AEM you will do just fine....If you want colder air to your engine don't bother buying cold air intakes, the longer the tube the more velocity the intake is creating "through a TWICE as LONG PIPE", minimizing top end HP.....If you want to achieve the cold air effect with a short intake such as the AEM or injen you can do what is called coolant bypass, that is as close to cold air as you will get weither you have a long or short intake.I say stay with a short intake, if you live in Cali get the AEM, if you live anywhere else get the Injen short Intake, followed by the coolant bypass...Cold air intakes is just more expensive and unecessary pipe for the "wannaBE" gains that it will achieve.AEM and Injen are both excellent companies, don't accept imatation!!!

[wilfonzo]

is there a write up or anything on this "coolant bypass" i did a search and came up empty... the pics are great but i cant figure out what is going on

[InsanityInc]

basically there's a coolant line running through the bottom of the throttle body so that in extremely cold climates, your TB doesn't freeze shut. This is obviously bad for intake temperatures, as it's going to make the throttle body extra hot. So basically you just run the coolant line directly to where it goes to after coming out of the throttle body, thus removing the TB from the coolant system.

[wilfonzo]

awesome, thanks alot!

[ddgsxr504]

Well I own an INJEN CAI and I am going to have to stick with works for me. As for buying a cheap CAI from Ebay I would be careful. My friend went that route and tired to make fun of me about how much more I spent on my INJEN than he did on his ebay crap. When he got it in the mail and asked me to help install it I turned the other cheek and decided to help him since he is a fellow 240 enthusiast. Anyhow after we were halfway thru the install it turned out that he didn't have every piece he needed and in my opinion it didn't fit as good as my INJEN does either. So after all that headache I made him re-install the stock unit and drive his own car to the home depot to retireve the extra hose and fittings. My point is you get what you pay for, always. Just know what you can go cheap on and what needs to be paid full price for!

[Bigvinnie]

basically there's a coolant line running through the bottom of the throttle body so that in extremely cold climates, your TB doesn't freeze shut. This is obviously bad for intake temperatures, as it's going to make the throttle body extra hot. So basically you just run the coolant line directly to where it goes to after coming out of the throttle body, thus removing the TB from the coolant system.

Couldn't of said it any better..

[InsanityInc]

oh, also be aware that your hood will flatten part of the pipe with either the AEM or injen system.

[ddgsxr504]

What the hell are you talking about?? The hood will flatten partof the pipe. If that were the case the damn pipe would have a dent in it the next time you popped the hood! That has never happened to me or any other person I know!

[BadMojo]

What the hell are you talking about?? The hood will flatten partof the pipe. If that were the case the damn pipe would have a dent in it the next time you popped the hood! That has never happened to me or any other person I know!

Yeah, I must admit that we've all probably seen dozens, if not hundreds of pictures of KA's with Injen or AEM intakes. Everybody and their dog seems to have at least an intake. In all of those photos, I've never seen a scratched up, crushed intake pipe. Maybe I'm just misunderstanding this whole thing...

I'll put my AEM in this Sunday, slam the hood three or four times and then take some pictures.