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Old 03-01-2008, 10:26 AM   #1
05 WHT STI
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Default cold air intake vs short ram

im am currently stage 2..i have the perrins short ram in my car..if i take it out and put in lets say an injen cold air intake and get retuned..would my hp increase ALOT more or only like 4hp

thx jimmy
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Old 03-01-2008, 10:51 AM   #2
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http://forums.nasioc.com/forums/show...hreadid=477393

most intakes have the same characteristics and you won't see much gain going from one to another. the major benefit of the cai is that the filter is placed outside of the engine bay so when you're sitting at a light, the intake air temp is cooler. other than that, intake temps are going to be the same once you start driving again.

if you're looking at cai's, do not buy the injen. look at aem, prodrive, buschur, or aps. i have an aps myself.

Last edited by nhat; 03-01-2008 at 03:13 PM.
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Old 03-01-2008, 01:28 PM   #3
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Sure you might see a slight increase in power when using the CAI, but it's the tune that will gain you the most.

CAI (w/tune) > SRI
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Old 03-01-2008, 02:24 PM   #4
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CAI > Short ram
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Old 03-01-2008, 02:43 PM   #5
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Quote:
Originally Posted by WRXLTD View Post
Sure you might see a slight increase in power when using the CAI, but it's the tune that will gain you the most.

CAI (w/tune) > SRI
Not so much. The lower IAT"s will have a bigger impact than the slight change in the maf scaling that might make you run a touch richer. It isn't something that will dramatically increase your VE and require a full tune.

It's moot either way, as you should have the maf scaled and tuned for any intake.

IMO a shortram is a downgrade from stock unless you're flowing enough air for the stock box to be a restriction.
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Old 03-01-2008, 05:33 PM   #6
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Mine had an improvement with replacing the SPT SRI with an APD CAI. Also, althought intake temps go plenty high with the CAI at idle, they drop extremely fast compared to the SPT intake.

I consider it an improvement, the only gripe is that the filter element is a pain to get to.
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Old 03-02-2008, 02:05 AM   #7
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Spending $XXX to retune for an intake to gain MAYBE X HP is redonkulous. NO ONE on this board can state if you will even see any gains at all, so don't spend $300-$700 on possibly nothing. So repress thoughts of getting a new intake as just as soon as you do, then you will doubt that brand too.
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Old 03-02-2008, 11:19 AM   #8
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If you ever looked at dyno graph comparison's on the Intakes vs Stock Air boxes, you don't see much more gains then 10HP. But if you look at the power band in the higher rpms the intakes does a much better job keeping the HP/TQ up until redline. Comparison of Short-Ram to CAI is the difference lies in stop and go traffic. It can get pretty toasty!

I did a comparison on the street Stock Airbox vs Injen CAI. I went from losing to winning. I didn't need to gain anymore power, I just needed to stop losing power.

06STi TBE(tuned),CAI(untuned),XPT Stage2 Map vs Evo VIII TBE,MBC,BOV,Flash

So I would say your Short-Ram since is tuned it's not worth switching to a CAI. I mean some people run GT3076R Turbo's with a short ram and they don't have a problem.

Last edited by tux121; 03-02-2008 at 11:32 AM.
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Old 03-02-2008, 11:56 AM   #9
freets_sti
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Default Aps

APS 65mm clod air intake is the best. It sits out of the HOT engine bay, but does not sit to low in the fender. Their is never any worries about it sucking up water driving in rain or driving through a big puddle. take my word for it.
i have one on my 04 STi and love it.
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Old 03-02-2008, 12:49 PM   #10
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Quote:
Originally Posted by Unabomber View Post
Spending $XXX to retune for an intake to gain MAYBE X HP is redonkulous. NO ONE on this board can state if you will even see any gains at all, so don't spend $300-$700 on possibly nothing. So repress thoughts of getting a new intake as just as soon as you do, then you will doubt that brand too.
In my case, Gabedude had tweaked the XPT tune around the APS intake. No additional cost, so it was worth it to swap out from the SRI. Paying for a protune, though? I picked up around 15 WHP in the process. Probably would have been worth waiting until I swapped injectors or put a bigger turbo on if I'd had to pay for a pro-tune.
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Old 02-02-2015, 12:36 PM   #11
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Question

Can anyone tell INJEN EVO COLD AIR INTAKE SYSTEM which is currently on sell on subispeed is is worth it to buy or not and why.
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Old 02-02-2015, 02:27 PM   #12
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Quote:
Originally Posted by abstar3370 View Post
Can anyone tell INJEN EVO COLD AIR INTAKE SYSTEM which is currently on sell on subispeed is is worth it to buy or not and why.
I assume this is for an otherwise stock 2015 STi? If so probably not worth it because they stock system isn't leaving a lot of power on the table for an otherwise stock setup. You'll also need to spend $ on a tune too.
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Old 02-02-2015, 02:30 PM   #13
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Quote:
Originally Posted by abstar3370 View Post
Can anyone tell INJEN EVO COLD AIR INTAKE SYSTEM which is currently on sell on subispeed is is worth it to buy or not and why.
No, because your stock intake is leaps and bounds better and you already have it. Plus once you spend the 3-500 on the setup you'll need to spend another 400 or more on a protune for it.

Please do your research.
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Old 02-02-2015, 05:35 PM   #14
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Yes I will be upgrading along with perrin exhaust system from headers till tail pipe a BOV and TUNE, i have research on some cold air intake but most of them suck air from engine bay AEM and also other.

Injen cold air intake directly suck air from front as we have very hot weather around 40'C so I am confused what to choose.
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Old 04-08-2015, 04:29 PM   #15
bloodyturd
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Default spanner for "ram air" into fender well re cai to span the gap.

I'm an idiot. now, I have an '07 wrx, aps 65mm cai in the fender well, "ram air" duct leads to hole where the "snorkus"(intake silencer) was, but there's a gap at the hood-fender junction area with only a small sill guarding the intake from rushing water from heavy rain or carwash. looking to span this gap. also looking to block off the fender well vent from the inside so that sprayed water cannot get the cai filter. any helpful ideas would be great. thanks very much for your help. found YouTube on how to take front bumper fascia off, nothing on putting back on, probably simple, but any little tricks?
I may just use duct tape and epoxy to fix the water concerns.

also, a bit on injen cai, I had one in storage for about 7 years, was looking to have that installed, was advised against by my professional tuner who specializes in wrx, said the maf sensor location on injen is at a bend which makes them very difficult to tune safely. so I traded for an aps 65mm.

with prodrive turboback catted sports exhaust, aps 65mm true cai, sti intercooler, short throw shifter professional dynotune. (I'm poor)

Last edited by bloodyturd; 05-02-2015 at 04:13 PM. Reason: extra awesomeness
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