Uppipe question for a noob
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This is a discussion on Uppipe question for a noob within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; Hey all..great site! I just picked up an '03 WRX wagon. Car is stock, except for a SPT cat back, ...

  1. #1
    Registered User pweizman's Avatar
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    Arrow Uppipe question for a noob

    Hey all..great site!

    I just picked up an '03 WRX wagon.

    Car is stock, except for a SPT cat back, and subaru short shifter.

    I was thinking of adding an uppipe. It seems like the STI OEM is the best, cleanest option. If I get one of these...what do I do with the EGT?

    Aftermarket ones seem to come with a EGT fooler...or something?

    Also...do you just pick up the OEM STI uppipe from the dealer? Are all years compatible with my '03?

    Thanks,
    Patrick

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  3. #2
    Registered User bkotzman00's Avatar
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    cheaper option is get an wrx oem used and gut it or find one already gutted and plug the egt with a screw and reinstall cost about $50 if you gut yourself (what I did)
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  4. #3
    Registered User pweizman's Avatar
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    Do you just leave the EGT sensor unplugged?

    Doesn't that throw a CEL?

    Later,
    Patrick

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    Registered User cheeseybacon's Avatar
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    If you decide to use a gutted stock WRX uppipe or an aftermarket uppipe with an EGT bung, simply plug the bung hole with a bolt. In either case, whether it's an STI uppipe or gutted WRX / aftermarket pipe, you're going to want to disconnect the EGT sensor. Follow the wire running from the EGT sensor until you come to a wiring harness connector where you can disconnect the sensor. Stick a 1/2-watt 2.2k ohm resistor (available at RadioShack for about $1) into the wiring harness connector where the EGT sensor was previously connected. The resistor will keep you from receiving any uppipe-related CELs.

  6. #5
    Registered User pweizman's Avatar
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    Quote Originally Posted by cheeseybacon
    If you decide to use a gutted stock WRX uppipe or an aftermarket uppipe with an EGT bung, simply plug the bung hole with a bolt. In either case, whether it's an STI uppipe or gutted WRX / aftermarket pipe, you're going to want to disconnect the EGT sensor. Follow the wire running from the EGT sensor until you come to a wiring harness connector where you can disconnect the sensor. Stick a 1/2-watt 2.2k ohm resistor (available at RadioShack for about $1) into the wiring harness connector where the EGT sensor was previously connected. The resistor will keep you from receiving any uppipe-related CELs.
    AH....

    Does anyone make a nice, plug in "fooler"?

    Later,
    Patrick

  7. #6
    Registered User DTR rex's Avatar
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    Quote Originally Posted by cheeseybacon
    If you decide to use a gutted stock WRX uppipe or an aftermarket uppipe with an EGT bung, simply plug the bung hole with a bolt. In either case, whether it's an STI uppipe or gutted WRX / aftermarket pipe, you're going to want to disconnect the EGT sensor. Follow the wire running from the EGT sensor until you come to a wiring harness connector where you can disconnect the sensor. Stick a 1/2-watt 2.2k ohm resistor (available at RadioShack for about $1) into the wiring harness connector where the EGT sensor was previously connected. The resistor will keep you from receiving any uppipe-related CELs.
    +1.

    Cheapest and easiest way to go about it.
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  8. #7
    Registered User Z_Spool's Avatar
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    Quote Originally Posted by pweizman
    AH....

    Does anyone make a nice, plug in "fooler"?

    Later,
    Patrick
    didn't you read? He said it was called a 2-watt 2.2k ohm resistor. (available at RadioShack for about $1) what more do you need. it plugs right in to the same spot, and is FAR cheaper than buying an "EGT Simulator" online for $15.00+S&H. Plus the "simulators" don't exactly have a clean record. Lots of people with bad ones.
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  9. #8
    Registered User pweizman's Avatar
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    Quote Originally Posted by Z_Spool
    didn't you read? He said it was called a 2-watt 2.2k ohm resistor. (available at RadioShack for about $1) what more do you need. it plugs right in to the same spot, and is FAR cheaper than buying an "EGT Simulator" online for $15.00+S&H. Plus the "simulators" don't exactly have a clean record. Lots of people with bad ones.
    I did read. Specifically what I wondered was if there was a very clean way to do it.

    I know shoving a resistor into the plug will work, but long term...will it fall out, will I have to tape it up...etc....

    Maybe the best route is to hack the plug off the EGT sensor itself, and solder in the resistor?

    Just doing some bench research...no disrespect intended...

    Patrick
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    Sold: '03 WRX Wagon (bugeyes rock!)

  10. #9
    Registered User bkotzman00's Avatar
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    i would avoid cutting connectors you never know you might need to go stock again, but some people use like silicone caulking and just cake the resistor and plug so no water gets in there
    04 WRX Java Black
    Mustang Dyno 218 awhp 216 awtq
    1978 Honda CB400Tll
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    1974 Honda CB750 Bobber
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  11. #10
    Registered User cheeseybacon's Avatar
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    Quote Originally Posted by pweizman
    I did read. Specifically what I wondered was if there was a very clean way to do it.

    I know shoving a resistor into the plug will work, but long term...will it fall out, will I have to tape it up...etc....

    Maybe the best route is to hack the plug off the EGT sensor itself, and solder in the resistor?

    Just doing some bench research...no disrespect intended...

    Patrick

    Honestly, it's not rocket science. How much cleaner do you want?!?


  12. #11
    Registered User pweizman's Avatar
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    Thanks Man...my bad.

    Patrick
    RSX-S
    Sold: '03 WRX Wagon (bugeyes rock!)

  13. #12
    Registered User SuckTheBruce's Avatar
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    Quote Originally Posted by pweizman
    I did read. Specifically what I wondered was if there was a very clean way to do it.

    I know shoving a resistor into the plug will work, but long term...will it fall out, will I have to tape it up...etc....

    Maybe the best route is to hack the plug off the EGT sensor itself, and solder in the resistor?

    Just doing some bench research...no disrespect intended...

    Patrick


    I watched my tuner put the resistor in and then put some heat resistant electrical tape around it so it wouldn't fall out. It definately doesn't look "dirty".
    I drive a WRX and work for Harley-Davidson .


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    Registered User rr1911's Avatar
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    Quote Originally Posted by cheeseybacon
    Honestly, it's not rocket science. How much cleaner do you want?!?

    is the same thing for the STi ?

  15. #14
    Registered User SuckTheBruce's Avatar
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    Quote Originally Posted by rr1911
    is the same thing for the STi ?

    As far as I know, but the STi doesn't have a cat in the up-pipe, so you don't need to gut/replace the up-pipe.
    I drive a WRX and work for Harley-Davidson .


    Blobeye Syndicate #42
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    Quote Originally Posted by powder View Post
    I love chowder. Cuz it rhymes with powder.

  16. #15
    Registered User cheeseybacon's Avatar
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    Quote Originally Posted by SuckTheBruce
    As far as I know, but the STi doesn't have a cat in the up-pipe, so you don't need to gut/replace the up-pipe.

    Correct. All STIs come with catless uppipes, thus it is pointless to install a new uppipe or perform a resisitor mod. The only time an uppipe upgrade is necessary on the STI is when a very large turbo is involved that needs an increased pipe diameter and/or you are making a switch to a twinscroll turbo and/or external wastegate setup. The vast majority of the time, the stock uppipe is more than adequate for the power levels that the typical STI owner will be running at.

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