Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Does a Catless up pipe shorten turbo life

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Old Jun 12, 2004 | 01:33 PM
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get up pipe
Old Jun 12, 2004 | 07:31 PM
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Originally Posted by Daredevil
get up pipe
You can do it!!!
Old Jun 12, 2004 | 11:14 PM
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since this is for a 2004 WRX, BTW: i'm getting one soon =), I would like to ask, is a ECU reflash required since the 04 ECU is not as mod friendly or would a simple CEL fix be all that is needed?
Old Jun 13, 2004 | 05:44 PM
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no way at all!!!!
Old Jun 13, 2004 | 06:09 PM
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cel fix
Old Jun 13, 2004 | 07:22 PM
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is a cel fix the same thing as unplugging the neg from the batt?
Old Jun 13, 2004 | 07:24 PM
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No, that's resetting the ECU.

At least on 02/03's, you need two "CEL fixes" when messing with exhaust components. One is a 2.2k ohm/0.5W resistor for the EGT sensor in the uppipe, and the other is a splice in fix for the rear O2 sensor to prevent "Cat Inefficiency" trouble codes from being thrown.
Old Jun 13, 2004 | 07:40 PM
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Originally Posted by mot
is a cel fix the same thing as unplugging the neg from the batt?

uppipe should be ok


:banana:
Old Jun 14, 2004 | 03:16 AM
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If anything, the catless up pipe will lengthen the turbo. The cat produces so much heat that is actually hard on the turbo. Also if anything was to break from inside the cat, it would go straight into the turbo and ruin it. Definitely buy the up pipe!
Old Jun 14, 2004 | 06:32 AM
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yep get the uppipe, it will lengthen the life as stated above.
Old Jun 16, 2004 | 02:05 PM
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up pipe lengthens turbo life, and makes the car more fun to drive!!!
Old Jun 16, 2004 | 09:00 PM
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Originally Posted by RCFerrara
I've read several places, most recently on MRTPerformance's site (http://www.mrtrally.com.au/performance/howbov.htm), that "turbo RPM is based on a "thermal load" NOT rpm as some people think". I guess I always thought that engine RPM and Turbo RPM are directly related. From what this website is saying, it sounds like heat is necessary. What am I missing here? Thanks.
hum.. well if heat is necessary then that’s why i get oily smoke after warm ups in my car.. i am running the stock turbo with a catless upipe and it sometimes puffs oil smoke out the tailpipe after i warm it up in the mornings. so im thinking that because i have a catless upipe at initial start up the heat is not there for so long that the seals on the turbo aren’t completely sealed yet and it leaks small amounts of oil into the exhaust until the seals warms...

cause after its warmed up and i rev it its puffs for a sec then clears up.. ive done a compression test and the engine seems to be in good health....

just a thought
edgar,

Last edited by zumnwrx; Jun 16, 2004 at 09:08 PM.
Old Jun 17, 2004 | 01:16 AM
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Originally Posted by mexicanpizza
No, that's resetting the ECU.

At least on 02/03's, you need two "CEL fixes" when messing with exhaust components. One is a 2.2k ohm/0.5W resistor for the EGT sensor in the uppipe, and the other is a splice in fix for the rear O2 sensor to prevent "Cat Inefficiency" trouble codes from being thrown.
Whoa... that's something I didn't know. I always thought you just needed the CEL fix on an un-catted downpipe. Where can you get the "CEL fix" for the up pipe?... Because I've only seen the one (CEL fix) for the downpipe for sale on most on-line websites. Thanks in advance.

-Neale



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