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High flow Cat question

Discussion in '348/355' started by gaw111, Oct 31, 2013.

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  1. gaw111

    gaw111 Formula Junior
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    George Wheeler
    #1 gaw111, Oct 31, 2013
    I'm going to put some high flow cats on my 348 soon and was wondering, will 100 cell cats give me a CEL if the thermal coupler and O2 sensor are installed? Would it make a difference between 100 and 200 cell as far as HP?
     
  2. gothspeed

    gothspeed F1 World Champ

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    #2 gothspeed, Oct 31, 2013
    No CEL on a 348, even with no cats :). However i am not certain about emissions of the 100 cell, or if that is even a concern for you. The HP difference between 100 and 200 cell would be negligible. Maybe 1 to 3 hp tops?
     
  3. gaw111

    gaw111 Formula Junior
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    #3 gaw111, Oct 31, 2013
    Thanks! I've been trying to research this today and have had little success. I figured an older car like this wouldn't have a problem, since it's ODB1 system. But figured it was best to check the knowledge base here.
     
  4. gothspeed

    gothspeed F1 World Champ

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    #4 gothspeed, Oct 31, 2013
    Cool :) ..... just make sure there is a precat o2 sensor bung, on what ever you decide to run ....... ;)
     
  5. Kaivball

    Kaivball Three Time F1 World Champ
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    #5 Kaivball, Oct 31, 2013
    I have a set of used Hyperflow cats for sale. About 5k on them.

    Kai
     
  6. gaw111

    gaw111 Formula Junior
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    #6 gaw111, Oct 31, 2013
    What about the thermal couple at the back, is that required?
     
  7. gothspeed

    gothspeed F1 World Champ

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    #7 gothspeed, Oct 31, 2013
    Only if you want to run the thermocouples. I think the main cat thermocouples are worthwhile on a 355 ...... I put the thermocouple bungs on the 348 cats I sometimes make .... but on a 348, I do not know if they are needed to prevent a CEL..... :eek:
     
  8. gaw111

    gaw111 Formula Junior
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    #8 gaw111, Oct 31, 2013
    Thanks again oz
     
  9. plugzit

    plugzit F1 Veteran
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    #9 plugzit, Oct 31, 2013
    No CEL on an 89 with thermos disconnected.
     
  10. gothspeed

    gothspeed F1 World Champ

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    #10 gothspeed, Nov 1, 2013
    what he said ... ^^^ ... :)
     
  11. Moiluck

    Moiluck Formula Junior

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    #11 Moiluck, Nov 1, 2013
    I am running with no thermal couple, no cat ecus and 200 cell hi flow cats in my 348, and no cells. Pass emission test with good readings.

    The cats were a bargain; Magnaflow ref: 59906. Universal with metal core. They meet CARB and EPA emission requirements. I paid 230€ for a pair, however needs welding (an easy job for any workshop)
     

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