Lag with Perrin Intake around 4- 4.5k rpms - Subaru WRX Forum
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#1 Old 07-17-2011, 11:54 PM
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Lag with Perrin Intake around 4- 4.5k rpms

I just installed a used Perrin Intake on my 09 WRX...
Current Mods include SPT CBE and stock DP.

any reason there is a little lag around 4k to 4.5 rpms? otherwise i like it and it sounds like i have a BOV installed.

Whats your guys' input?
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#2 Old 07-18-2011, 05:56 AM
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Do you have it tuned yet? Or any engine management ?

Paul
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#3 Old 07-18-2011, 07:42 AM
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If it were me i would take that intake off and put the stock one back on. There is no real need to change that part with no other effective power mods. All it will do is screw up your afr. And let you hear the stock Bpv. But Paul is right. Any tune on the car? If not save yourself a new engine and put the stock one back on sell that thing and go get a downpipe and tune.

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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#4 Old 07-18-2011, 08:39 AM
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If it's the CAI I know of (foam filter).... Get the updated filter for it.

If not..... That CAI will throw everything out of whack....

Paul
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#5 Old 07-18-2011, 11:20 AM
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Perrin Claims you don't need a tune with their Intake but it definatly sounds like that is the issue. Good luck, Like suggested I would throw the Stock intake back in and see if it is running better, if so look at getting the AP for the car with the Map for the perrin intake.
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#6 Old 07-18-2011, 12:36 PM
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Quote:
Originally Posted by kcwrxfan View Post
Perrin Claims you don't need a tune with their Intake
And that's a lie.
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#7 Old 07-18-2011, 01:39 PM
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And that's a lie.
true dat.

OP the stock tune is dangerously lean from the factory. specially when your diving around normal (closed loop map setting) and then try to go WOT (open loop). the car doesnt adjust the fuel when you go from closed to open for a period of time called time delay. it will run 14.5 AFR to about 4-4500rpm while your already at max boost. because of your intake your even more dangerously lean and the ecu is pulling timing and boost because your motor is knocking and trying not to blow up! Perrin says its safe because they think it is when your in open loop and open loop only. these motors hate knock and the pistons break all the time. get a pro tune ASAP or take it off or risk a motor that goes boom.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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#8 Old 07-18-2011, 05:15 PM
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I need to hurry up & get a Stage 1 on quick. Y'all are scaring the hell out of me w/ the AFR readings running so lean in stock trim. What a bunch of BS.
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#9 Old 07-19-2011, 05:45 AM
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To top it off, that intake is one of the hardest ones to tune for (Al from Dynoflash did mine and had a helluva time with it).

Is it the silicone one with the foam filter?

Paul
2007 XT
2007 MS3
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#10 Old 07-19-2011, 07:24 AM
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Originally Posted by pzr2874 View Post
Do you have it tuned yet? Or any engine management ?
nope no ap yet....thats my next mod.
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#11 Old 07-19-2011, 07:26 AM
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Originally Posted by pzr2874 View Post
If it's the CAI I know of (foam filter).... Get the updated filter for it.

If not..... That CAI will throw everything out of whack....
ya i believe its a 2 yr old perrin intake but its the same part number and style as the one on their website right now...

so maybe its the old filter?
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#12 Old 07-19-2011, 07:28 AM
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Originally Posted by pzr2874 View Post
To top it off, that intake is one of the hardest ones to tune for (Al from Dynoflash did mine and had a helluva time with it).

Is it the silicone one with the foam filter?
silicone tubing? no aluminum...

the filter is a little dirty though i dont know if that would cause the problem that i am having though..
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#13 Old 07-19-2011, 07:30 AM
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Originally Posted by kcwrxfan View Post
Perrin Claims you don't need a tune with their Intake but it definatly sounds like that is the issue. Good luck, Like suggested I would throw the Stock intake back in and see if it is running better, if so look at getting the AP for the car with the Map for the perrin intake.
well the filter is a little dirty but i dont think that it would cause my problem...so should i take it off until i get the ap...and then maybe just put a drop in filter in the stock one ### the paper one in my stock filter was crap...

will it really mess my engine up that quickly??
this is really scaring me!
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#14 Old 07-19-2011, 08:06 AM
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Yes it can break it that fast. This is no joke. Synolimit knows his stuff. An aftermarket cai won't get you but 5-10 hp but its doing it the wrong way... Yeah it may feel a bit more responsive down low but the reason for that is because its leaning the ever loving Hell outta your car.

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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#15 Old 07-19-2011, 10:51 AM
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Yeah, get a stock box and a K&N drop in filter.

For now.

FWIW.... The CAI's give you more in the mid to top end......

Paul
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