IW STi Forum banner

1 - 13 of 13 Posts

·
Drive True
Joined
·
6,833 Posts
Discussion Starter #1
What would you recommend for a cold-air intake? I read that AEM makes a good one and so does K&N...I'd like to know what's out there that offers the best price/performance/fuel economy balance.
 

·
Registered
Joined
·
2,773 Posts
I think AEM is the way to go. I wouldn't touch Injen with your stock intake! ;)

I ran an Injen CAI for about a 6 months until the AEM came out, did a comparo....no doubt in my mind AEM is a better designed and built unit.

I haven't seen a K&N other than the molded plastic intakes they make for SUVs. For some reason, I have a feeling their intakes wouldn't be as well designed as AEM. IMO, K&N is just jumping on the import bandwagon to grab a few benjamins.
 

·
Drive True
Joined
·
6,833 Posts
Discussion Starter #3
Thanks Clone...I also was told that some intakes make the engine run lean, did you have to do a re-map after you had the AEM installed?
 

·
Registered
Joined
·
357 Posts
Topless Wing

Actually I wouldn't use a CAI. Remember, on a turbo car you want the shortest path possible. That is more important than having colder air since the air will get heated up and cooled down anyway. Even if you have a 20 degree difference in 8inlet air temp, I doubt it will be more than 1 degree of difference once it gets to the throttle body anyway. Secondly the piping on the cold airs (any of them) will cause some wierd resonances and create a very off AF mixture curve. Unless you plan on dyno tuning it with a UTEC or similar AF device I say stick with stock intake and spend the money on mods that will actually make a difference. Uppipe/downpipe/exhaust will be a much better place to start.
 

·
Registered
Joined
·
2,773 Posts
Not if the intake itself is a bottle neck.

I do agree with Dan about the CAI in a turbo car though. Get the additional flow of an aftermarket filter, get rid of the stock box, but let the intercooler do it's job.
 

·
Drive True
Joined
·
6,833 Posts
Discussion Starter #7
STi Keychain thread in STi Interior

well how do I keep the filter in place if I don't have the filter box? I'm confused... :-?

I found out that AEM also makes short ram induction intakes, would this be better than a CAI? And would I need to do an ECU re-map?
 

·
Registered
Joined
·
112 Posts
i don't think any intakes are out for the 04 STIs yet, but u can definitely get a custom job in getting a HKS style foam filter in
foam filter works best and cleans itself with a few drops of detergent
 

·
Registered
Joined
·
2,773 Posts
Should the intakes from a WRX fit? I didn't think the intake tract of the STi was any different.

Any intake system is going to replace your stock intake box (all that black plastic crap under the hood....and the tons of it you can't see). It will simply be a tube that runs to the MAFS or near it and then the intake is on the other end of it. CAIs and short rams are only different in that a cold air runs the tube all the way outside of the engine bay...so that it draws cooler air in.
 

·
Registered
Joined
·
357 Posts
The Blitz SUS is the best intake I have found. I was flabbergasted at how much power was gained when we removed the cats and added the SUS on the STi.
 

·
Registered
Joined
·
28 Posts
AEM is good one. in the fender the best. Frist i removed the junk, just ran the stock filter box and KN panel filter. Now i have the AEM in the fender lots better. Cleans up the engine compartment real nice :lol:
 

·
Registered
Joined
·
357 Posts
CloNeGTS said:
I've always heard good things about that intake.

Is that in fact a WRX unit that you installed Dan?
Yep. Same same. Works incredibly well and sounds awesome.
 
1 - 13 of 13 Posts
Top