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Old 02-27-2007, 11:39 AM   #1
shemoves
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Default APS CAI on STi

I am going to be getting a retune, and figure I might as well do some other stuff while I am at it. I am leaning heavily toward the APS CAI, my main question is weather I should go for the 65mm or 70mm...

Or if there are better options all together I am open to that.
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Old 02-27-2007, 12:28 PM   #2
jnorth85
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70MM is for higher power cars
65mm will do just fine for the stock turbo or up to around 400WHP anything more than that and you will need to go to the 70mm.
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Old 02-27-2007, 01:43 PM   #3
2TG8V
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Talk to your tuner,I got the 70mm and it seems to be a pain to make it run smooth at low engine speeds.My car has a stumble coming off idle but runs great after that.
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Old 02-27-2007, 03:30 PM   #4
Island Style
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Default Like JNorth85 said...

I chose the 65mm due to it's design...to mimick the airflow characteristics of our stock airbox...

I'm running Stg2 with Protune...works great.

Stock Sti Turbo/TMIC/Injectors/FP...
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Old 02-27-2007, 03:47 PM   #5
kellygnsd
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No need to change intakes untill you get a front mount or go rotated and can't use the perfectly good stock one
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Old 02-27-2007, 06:41 PM   #6
moreboost
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I have the APS 65mm running on a COBB stage 2 and runs mint. But will be swapping it out when I put the UR kit on. Stay 65mm unless you are running a bigger Turbo.
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Old 02-28-2007, 02:42 AM   #7
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Quote:
Originally Posted by moreboost View Post
I have the APS 65mm running on a COBB stage 2 and runs mint. But will be swapping it out when I put the UR kit on. Stay 65mm unless you are running a bigger Turbo.

are you protuned? if not, what are your AFR's ?
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Old 03-01-2007, 09:30 AM   #8
moreboost
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APS 65mm intake is going up for sale next week only used for 2 months.
$230cdn if anyone is interested and it will be posted in the 4sale. Not to steal your thread.
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Old 03-02-2007, 02:03 PM   #9
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Quote:
Originally Posted by MarkRx View Post
are you protuned? if not, what are your AFR's ?

You do not need to be tuned for this intake, and it will not harm your A/Fs
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Old 03-02-2007, 06:31 PM   #10
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Best part about this intake is if you didn't know better you would think it was stock it fits so clean and matches all the other pipes. I had someone approach me at a day of lapping and he was impressed and thought the pipe was a stock piece.
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Old 03-02-2007, 10:12 PM   #11
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Quote:
Originally Posted by Davenow View Post
You do not need to be tuned for this intake, and it will not harm your A/Fs
Put the pipe down slowly and back away... you know as well as I do it's going to have SOME effect on it. weather it's dangerously lean or not you'll only know by logging it with a wideband. There's a 65mm aps cai on it's way to my doorstep, wanna log it and see what it does wih my stage-2 ? I'm in austin.
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Old 03-01-2007, 11:55 AM   #12
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I would stick with the stock box until you get a bigger IC and Turbo then bump up to the 70mm (with a tune). Unless you can find a cheap 65mm around and then just sell it when you do your other upgrades.
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Old 03-02-2007, 12:10 AM   #13
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Anyone install one of these on an 06 please chime in, i understand there are 2 modifications needed before it will fit correctly.
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Old 03-02-2007, 09:54 AM   #14
moreboost
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No modification needed for install, I have my APS installed. The air filter is a little tight in the fender and pushes agaist the bumper clips but with some patients and constant adjusting it will fit.
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Old 03-02-2007, 01:30 PM   #15
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Cool, i was reading that the cold air pipe was hitting the raised brake lines and the bumper clips in the fender would rub on the filter.
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Old 03-02-2007, 01:59 PM   #16
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Yes you need minor adjustments to it, its not an exact fit.
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Old 03-03-2007, 12:05 AM   #17
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You don't need to tune your car for the 65mm. If you end up with the 70mm you will be running your motor too lean. In all honesty you don't need a CAI at all your stock box does a great job. Unless you want the cool sound form sucking all that air in. Put your money in an EM system or exhaust. You will see bigger results.
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Old 03-09-2007, 02:45 AM   #18
MarkRx
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I already have a V2 accessport running the stage-2 off the shelf cobb 93 map. also running a cobb catted TBE. I have an aps CAI, just hesitant to install it since i don't have a wideband and no means to datalog. How safe am i to install this 65mm aps cai without looking to see how my car is responding or a tune??
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Old 03-09-2007, 12:57 PM   #19
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Quote:
Originally Posted by MarkRx View Post
I already have a V2 accessport running the stage-2 off the shelf cobb 93 map. also running a cobb catted TBE. I have an aps CAI, just hesitant to install it since i don't have a wideband and no means to datalog. How safe am i to install this 65mm aps cai without looking to see how my car is responding or a tune??
read my post above yours.... With the 65mm you don't need a tune period. The problem with the 70mm is if you DON'T get a protune you will run your car too lean.
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Old 03-09-2007, 12:47 PM   #20
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bump.
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Old 03-09-2007, 12:59 PM   #21
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I guess i don't wanna be that "one car" that freaks out with afr's. I need to get it protuned, that's the only way i'll sleep at night.
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Old 03-09-2007, 07:10 PM   #22
moreboost
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Quote:
Originally Posted by MarkRx View Post
I guess i don't wanna be that "one car" that freaks out with afr's. I need to get it protuned, that's the only way i'll sleep at night.
Only if you get the 70mm
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Old 03-10-2007, 11:34 AM   #23
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^^ LOL i said that to MarkRx twice. The 65mm will give you the same effects as a drop in K&N replacement filter. (other than the sucking air sound)
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Old 03-10-2007, 11:35 AM   #24
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if you want to spend your money on a tune for just a CAI then go ahead. It is better than a off the shelf map. But if you are planning on doing anything else to your car I suggest waiting until you have a handfull of mods then spend the money on a tune.
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Old 03-10-2007, 11:39 AM   #25
shemoves
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well, just an update. I got a 65mm and installed it during the week. I've been testing it out over the past couple days and have gotten very consistent results. AFRs went from being around 10.9 +/- 0.2 at high load WOT, to 10.2 +/- 0.1. I even saw it get down intot the 9s once. So, I am running rich (better than lean at least). On the plus side EGTs dropped from the mid 1500s to the mid 1400s.

So, it's safe enought to drive on and have a bit of fun, but I'll def need a retune soon.

I am wondering; however, because it's running rich, if it is actually a 70mm...

Last edited by shemoves; 03-10-2007 at 03:45 PM.
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