I bought an Injen CAI way before I knew better. It's been sitting in my garage for about 2 years now, and nobody wants to buy it. I just read an article saying that the K&N short ram on an STi was good for about 10hp.

Do you think I'll see any gains if I chop my Injen CAI and make it a short ram for my 02WRX?

 

If you can get the filter housing on after the MAF sensor and still have enough clearance i dont see why not. Also make sure that the tube diameter that the filter housing is on now is the same where its going to be installed in the compartment.

 

Why don't you want to use your CAI? You already have it.

You can hack it if you like (I hacked my AEM CAI to make a short ram because I have a FMIC). I wouldn't expect it to give you any more power by making it a short ram.

 

how much do you want for your intake. i have an AEM if you will take for trade. then you can chop that one. i need an injen intake for one of my cobb ap.

 

I dont want to use the CAI because they are horrible. Do some research, they are worth nothing. But after seeing the review of the K&N on a STi, I have this crazy idea of cutting it up and making a short ram.

Has anyone done this (besides for with a front mount) with good results?

 

CAI are better for performance if you have other supporting mods and have engine management. You won't get a big boost in power if you have an otherwise stock setup. You should leave the Injen CAI as it is or just sell it if you don't like it.

 

You need to do a little research yourself, it seems like you don't fully understand the previous posts about CAIs. Read the CAI sticky one more time and we'll talk.

 

Ok, I've read the sticky AGAIN. Maybe I should choose my words a little more wisely because that thread (or one similar to it) was what convinced me pull out the intake two years ago.

It seems that I wasn't clear enough on my previous posts. On my VERY lightly modified WRX, the CAI most likely will not give me consistent gains. I have still not seen a dyno graph showing a power increase from a CAI on a stock WRX.

Real world example: A good friend of mine installed an AEM intake on his rex, and had it dynoed a few days later (He waited a few days so the stock ECU could adjust to the changes) but his car showed a small loss of power with the CAI installed. He took it off, waited a few days, dynoed it again and had the power back.

That brings me back to my original question, which you answered. Will a short ram make power if a cold air intake won't? After seeing an STi make power with a short ram intake, I am wondering if short rams are better.

I just want to do something with the $275 intake that has been collecting dust in my garage for 2 years.

 

LISTEN!

Sonic and Mister2 are giving you the gospel but you're hearing what you want to hear.

You won't get any gains worth mentioning from either a shorty or a CAI, and there's potential either way that they could skew the voltage signal denoting the mass of air being sucked in that the ECU sees.

You won't see much of any benefit until you strap on some performance package that where all of the components complement themselves, like a larger turbo, larger injectors and fuel pump and an adequate means of managing all of the above.

Now, either listen to the earnest answers that folks are giving you to your tired, much asked question, or go ahead and continue on with your 'how much HP can I expect with such and such BOV' thread you've been working on, and ignore the voice of experience.

 

t-wrexxx,
think of it this way. the main problem with CAI is how they affect your MAF readings. if you were to hack your Injen CAI the part where the MAF is bolted to is still the same. if anything you'd be sucking warmer air into the engine. besides, as far as CAIs go the Injen one is one of the better (i.e. more consistent) ones.

now regarding the K&N results, i read that article and the numbers do seem impressive. however i am reluctant to believe it. i've seen many back to back dyno runs vary by about 5 hp or more. i could probably take just about any car on the dyno and just by "tweeking" a few things get a 10 hp difference in runs. my $0.02

 

magazines are funded by their advertisers. i have yet to read a negative review in any automotive magazine.

 

This was actually the reason I asked, but you answered my question on your first post on this thread when you said that you would't expect it to make more power if I cut it into a short ram.

 

sell it to a ricer.