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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor


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Old 10-30-2004, 08:37 PM   #1
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STi owners, is the intake worth the money for what you get in this mod?

is it just sound, or is there any performance gains that come with it?

and if you do recommend an intake, which would it be?

APS CAI?
K&N TYPHOON SHORT RAM?
FILTER CHANGE?
OTHER?

thanks


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Old 10-31-2004, 05:36 AM   #2
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in order:
yes
no...yes
typhoon
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Old 11-07-2004, 02:32 PM   #3
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lol the typhoon short ram is the only real choice IMO
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Old 11-07-2004, 06:52 PM   #4
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get me typhoon tomorrow, let you know
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Old 11-07-2004, 09:47 PM   #5
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Can anyone post numbers on the Perrin short ram?

I know that K&N claims 12HP and it comes at the top end, similarly, TurboXS claims some decent gains, but it seems to be more in the midrange. My thinking is that the pipe after the MAF sensor is where the primary difference is in top end performance. The TurboXS kit makes use of the stock accordian tube, whereas K&N and Perrin use their own pipe. It would be my guess that the Perrin intake produces similar results to the K&N for this reason.
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Old 11-07-2004, 10:13 PM   #6
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from what i've read and the people i have spoken to, I have found that many people who use the perrin intake end up taking it off for a variety of reasons. I have yet to hear/read anything to that end with respect to the typhoon for the STi. It may been a MAF sensor issue. Any one know if the perrin is a MAF direct fit?
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Old 11-08-2004, 05:38 AM   #7
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Also make sure to realize most of the excitement from the k&n typhoon is there because people are dynoing them personally and getting great results. I dont know if we can say the same about the perrin and other kits.

Robert~
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Old 11-08-2004, 03:28 PM   #8
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very true...the KN is hot right now b/c it does what it claims.
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Old 11-08-2004, 04:58 PM   #9
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is that typhoon comming with a carb approved sticker now?

sman
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Old 11-08-2004, 06:07 PM   #10
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just got mine , it isn't carb approved yet.
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Old 11-08-2004, 06:09 PM   #11
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just got mine , it isn't carb approved yet.
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Old 11-08-2004, 07:35 PM   #12
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thumbs up for APS.
car doesn't feel slower at all (no i did not dyno the car)
but it does sound meaner, and that's why i installed it. worth the money for sure.


Jurgen.
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Old 11-09-2004, 07:22 PM   #13
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Well I asked about the Perrin primarily because that is what I ordered - and installed today. As you would see from the picture I attempted to attach, I also modified the stock air ducting to dump air right in front of the intake. Coupled with a removed snorkus, I doubt that is sucking in much warm air at speed, but who knows.

Anyway, the top end feels less flat. I honestly can't discern a torque difference, but an extra 10 ft-lbs (or less??) on top of 300 is a tough thing to discriminate by the seat of the pants.

No install problems, no CEL. Unless there are routing issues with a FMIC installation, I see no reason to expect problems.
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Old 11-09-2004, 07:35 PM   #14
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Ok, so I managed to lift a finger and FTP the pic to my site.

And for what it's worth, fabricating a cold air box out of aluminum or plastic is extremely simple. Like the K&N box, it doesn't really need to seal off the area so much as contain and shield it to be effective.


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