P0420 Catalyst efficiency Code

Discussion in 'Challenger SRT8 Engine & Performance Modifications' started by Tom Joyce, Nov 24, 2021.

  1. Cloverdale

    Cloverdale Full Access Member

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    Good for another year or longer? What's your whp at with that set-up? dodge louver.JPG
     
  2. Tom Joyce

    Tom Joyce Member

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    2 years fortunately. Power is low 600's at the RW, can't remember exactly. Runs 8 lbs of boost, lowered the compression to 9.5:1 with Weisco dished pistons when I did the motor.

    20211125_191425.jpg
     
    70-426_10-SRT and Cloverdale like this.
  3. 70-426_10-SRT

    70-426_10-SRT B&E body lover

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    Still plan on doing this to my 6.1 at some point, but probably not until I get my SRT 300.
    My Problem is getting the tires to hook up.
    What are you Running for tires?
     
  4. Tom Joyce

    Tom Joyce Member

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    Stock tires, as long as it's pointed straight, it hooks fine, but if the blower hits in a turn, it's all over. There's 150 lbs of stereo equipment in the trunk, so that may help.