CAI and crank pulley - Subaru WRX Forum
 
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post #1 of 10 Old 11-19-2007, 05:58 PM Thread Starter
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CAI and crank pulley

a am looking into getting a lightweight crank pulley the two i have came down to are Agency and Perrin any suggestions ? and has anyone felt noticable drive difference with any kind of pulley?

and i am also looking into a cold air intake i have been looking at AEM , Injen, and K&N. and suggestions?
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post #2 of 10 Old 11-19-2007, 06:10 PM
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I never "noticed" a difference with a pulley but I would go with Agency is you are going to get one.

And don't get a CAI but a short ram intake...ensure that it is the same diameter as stock so you don't throw off your MAF sensor.
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post #3 of 10 Old 11-19-2007, 07:06 PM
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my car reved easier after I put the lightened stock DIA Perrin pulley on.

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post #4 of 10 Old 11-19-2007, 07:37 PM
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DONT get an CAI unless you have tuned for it. It tends to make the car run rich.
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post #5 of 10 Old 11-19-2007, 11:27 PM
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Quote:
Originally Posted by awd4life View Post
DONT get an CAI unless you have tuned for it. It tends to make the car run rich.
Whaaaaaatttt? Rich???

Hmmm, it would have a tendancy to run lean more than anything.

http://www.wrxtuners.com/forums/show...6112#post26112

see 2.52

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post #6 of 10 Old 11-19-2007, 11:51 PM Thread Starter
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so how come u wouldnt suggest a cai the only reason i hear not to get it is because it is placed closer to the ground and a possibilty of water being sucked up. but i didnt worry at all about that since i live right in the middle of arizona. and any suggestions on short ram intakes that run well with the wrx?
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post #7 of 10 Old 11-20-2007, 12:04 AM
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CAI will lean out the car and possibly cause premature engine issues,(read failure) without a tune.

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post #8 of 10 Old 11-20-2007, 12:12 AM
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Originally Posted by pearl_boxer View Post
Whaaaaaatttt? Rich???

Hmmm, it would have a tendancy to run lean more than anything.
My apologies... Is what I meant to say. A case of thinking something and the fingers do something else. I am sorry. But nevertheless, CAI not a good idea, due to LEANING out the mixture.

You dont really want to put an intake on because the "stock intake is good up to 325hp."
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post #9 of 10 Old 11-20-2007, 07:51 PM
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Quote:
Originally Posted by dre44rocks View Post
so how come u wouldnt suggest a cai the only reason i hear not to get it is because it is placed closer to the ground and a possibilty of water being sucked up. but i didnt worry at all about that since i live right in the middle of arizona. and any suggestions on short ram intakes that run well with the wrx?
SPT Shortram Intake & Perrin Crank Pulley.
You can't go wrong with an SPT part and I noticed a faster rev with the lighter pulley. Not so much power though.
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post #10 of 10 Old 11-21-2007, 04:21 AM
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I put a Perrin on my first WRX after I had modified the intake and put on a Perrin uppipe, and modified the exhaust with a 3" turbo-back with only a muffler. Vishnu did a reflash and then I put on the Perrin pulley. The added power was immediately apparent.

The WRX I now have also has a Perrin pulley, but we put it on when we did everything else; so there's no way to know what effect it might have. I guess what I'm saying is that if you have basically a stock engine, the pulley will make a difference.

Intake: just take the plastic intake tube off, and then take out the plastic resonater or whatever-it-is inside the fender. Cover the hole with tape or a piece of metal or whatever, so that the intake gets air only from inside the fender. Find a piece of rubber or pvc that will attach onto the intake tube on the air-filter box and put it into the hole so that no hot air from the engine compartment can get into the filter box. You will have more than enough air. It will be cool air. It will not be hot air from inside the engine compartment. And it won't cost you anything but a little time.
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