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Old Sep 4, 2009 | 07:48 PM
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Default Induction kits......

......do any of the usual induction kits like K&N (and so on) mess up the MAF on MY 05 WRXs?

Ta
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Old Sep 4, 2009 | 08:11 PM
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almost all do mate,

the only one I know that is developed with the MAF problem in mind is the Perrin kit.
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Old Sep 4, 2009 | 08:23 PM
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I'm running an AEM kit and mapped, its never give me a problem yet. It is a dry flow filter though
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Old Sep 4, 2009 | 08:35 PM
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the apex'i one is "supposed" to be the best, but any dry filter should be good..
i'm running a blitz sus,and before that a lm version...
and the apex'i ones next
chris
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Old Sep 4, 2009 | 09:07 PM
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Originally Posted by al02uk
almost all do mate,

the only one I know that is developed with the MAF problem in mind is the Perrin kit.
So how do you get around the problem?
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Old Sep 4, 2009 | 09:29 PM
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Originally Posted by Janspeed
So how do you get around the problem?
have a look on the Perrin website,

they say you don't even need a remap with their kit as it is designed to produce the same air/fuel ratio as the original airbox (god knows how that works).

In fairness it does work, I got one for my car and didn't have it mapped and it worked great. I have it mapped now and still no problems.

Last edited by al02uk; Sep 4, 2009 at 09:32 PM.
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Old Sep 4, 2009 | 11:46 PM
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Originally Posted by al02uk
have a look on the Perrin website,

they say you don't even need a remap with their kit as it is designed to produce the same air/fuel ratio as the original airbox (god knows how that works).

In fairness it does work, I got one for my car and didn't have it mapped and it worked great. I have it mapped now and still no problems.
Perrin? Ok.

Who went bust a while ago, Forge?
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Old Sep 5, 2009 | 06:38 AM
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I've had a K&N Typhoon, and now have a Hybrid CAIK and my MAF hasn't missed a beat!
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Old Sep 5, 2009 | 09:35 AM
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Forge is still about mate,

I'm not sure who has gone bust tbh.
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Old Sep 5, 2009 | 10:39 AM
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Or you can save your pennys and spend an hour with a dremel on your existing setup. Made a huge difference on my STI8 PPP. Instead of peaking at 6000rpm, the car pulls really hard all the way to the redline (7600rpm) with no peaking at all. My only worry now is that it might be leaning! Put the money toward something really useful like porting or a remap...
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Old Sep 5, 2009 | 04:20 PM
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The OEM induction is pretty good for any newage if you want an induction kit then as long as it's the same diameter as the OEM at the MAF housing then it won't need rescaling......the Newage MAF's are pretty tough so vibration damage not really an issue

Have a trawl around RCMS website

Shaun
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Old Sep 6, 2009 | 03:47 PM
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Originally Posted by chrisdicko
I've had a K&N Typhoon, and now have a Hybrid CAIK and my MAF hasn't missed a beat!
Been looking at those.....
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Old Sep 6, 2009 | 03:48 PM
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Originally Posted by al02uk
Forge is still about mate,

I'm not sure who has gone bust tbh.
Some Yank company, no matter, if it was really good we would remember!
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Old Sep 6, 2009 | 03:48 PM
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Originally Posted by aXeL
Or you can save your pennys and spend an hour with a dremel on your existing setup. Made a huge difference on my STI8 PPP. Instead of peaking at 6000rpm, the car pulls really hard all the way to the redline (7600rpm) with no peaking at all. My only worry now is that it might be leaning! Put the money toward something really useful like porting or a remap...
What's that? (feels stupid)
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Old Sep 6, 2009 | 03:49 PM
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Originally Posted by Midlife......
The OEM induction is pretty good for any newage if you want an induction kit then as long as it's the same diameter as the OEM at the MAF housing then it won't need rescaling......the Newage MAF's are pretty tough so vibration damage not really an issue

Have a trawl around RCMS website

Shaun
Ok, will keep that in mind.

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Old Sep 7, 2009 | 09:08 PM
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Originally Posted by Janspeed
What's that? (feels stupid)
No worries - look it up in Argos or B&Q - cross between a drill and an electric screwdriver but much faster. ~£40-£50. Used it to cut and smooth out the stock induction and cut a hole in the lip of the front grill so air can flow straight into the induction. That, by itself greatly increased the mid range to high end power.

Also used it on the weekend to port my exhaust headers - made a drastic difference to the turbo spool and low end response. Throttle is getting nice and 'twitchy' and the car always feels on the edge of just launching, in any gear, except 6th...

Only thing to be careful of is the car running lean. The ECU is very adaptive but with all this induction tweaking I need to tweak the ignition map and possibly the fuelling too.
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Old Sep 7, 2009 | 10:51 PM
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Troll......

This is the real axel



Shaun
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Old Sep 7, 2009 | 10:51 PM
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A dremel - the secret to success.
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Old Sep 7, 2009 | 10:57 PM
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Originally Posted by Midlife......
Troll......

This is the real axel



Shaun

I can sign that for you....
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Old Sep 10, 2009 | 10:47 AM
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Originally Posted by aXeL
No worries - look it up in Argos or B&Q - cross between a drill and an electric screwdriver but much faster. ~£40-£50. Used it to cut and smooth out the stock induction and cut a hole in the lip of the front grill so air can flow straight into the induction. That, by itself greatly increased the mid range to high end power.

Also used it on the weekend to port my exhaust headers - made a drastic difference to the turbo spool and low end response. Throttle is getting nice and 'twitchy' and the car always feels on the edge of just launching, in any gear, except 6th...

Only thing to be careful of is the car running lean. The ECU is very adaptive but with all this induction tweaking I need to tweak the ignition map and possibly the fuelling too.
Thank you for enlightening me!

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