Home › Forums › Gen III / Gen IV › Gen III vs Gen IV vs Gen V Exhaust Heat Part 1 of 2

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    • Shannon Whitehead
      Keymaster
      June 6, 2015 at 6:39 am
      Post count: 274799
      #207717

      Good idea and thanks for the data. FYI, much of the exhaust’s radiant heat is sourced from the cats as the core bricks heat up from exhaust flow. I noticed that they weren’t wrapped. It’s also likely that wrapping them with decrease the lifespan of the cat.

    • Shannon Whitehead
      Keymaster
      June 6, 2015 at 7:19 am
      Post count: 274799
      #207729

      I’m not sure if what I’m doing will make the exhaust area any cooler as I did not wrap the very tip of the pipe. What’s your opinion on not having the last 6-8 inches not wrapped.

      The rocker panel and the interior should be a good bit cooler. I think getting rid of the cross-over pipe and having the exhaust exit faster from the system will make a good difference with the top down and A/C off.

      I did notice where the exhaust exists on the Gen V, they used a different material than the Gen III, which is really thin material, and the Gen V’s black area appears to be thicker and is not flush with the rocker, maybe due to to some sort of insulation material built into the black plate.

    • Shannon Whitehead
      Keymaster
      June 6, 2015 at 8:46 am
      Post count: 274799
      #207740

      I’m guessing you already know this, but those aren’t the OEM Gen 4 cats, and if I had to guess, I’d say they were probably high flows. That alone will decrease the exhaust temps substantially, as will only having 2 instead of the factory 4.

    • Shannon Whitehead
      Keymaster
      June 6, 2015 at 8:54 am
      Post count: 274799
      #207741

      I did full exhaust on my Get III and can grab the side sills after a drive. You can even touch the intake. Opening the exhaust up does wonders.

    • Shannon Whitehead
      Keymaster
      June 11, 2025 at 2:19 am
      Post count: 274799
      #18890

      Today I took my stock Gen III for a 45-60 minute ride and measured the surface temperature of the rocker panel, and the black area of the exhaust port. The weather outside was partly cloudy with the temperature of 79 degrees, the exterior car (door panel) temperature was 91 degrees, With the engine running the rocker panel was 146 degrees, Black Exhaust Port Panel was 331 degrees. Both sides of the vehicle were with 3-4 degrees of each other. I obtained some Gen IV Cats and Mufflers (Thanks to Tom Sessions) and wrapped them with DEI Titanium Exhaust Wrap – temps good up to 1800 degrees. I took the following temps/pic with engine running and then took them again after the engine was off for five minutes.

      This pic temp at exhaust port w/engine running at idle.
      ExhaustPortEngineRun.jpg

      This pic temp of rocker panel w/engine running at idle
      rockerEngOn.jpg

      This pic temp at exhaust port w/engine off for 5 minutes
      EngineOff5Min.jpg

      Pic of Gen IV exhaust system w/wrap
      Gen-4IVDEI-1750wrap.jpg

      Not knowing how accurate this handheld device is, but gauging it to my wife’s “O ShxT” yells when she forgets to exit the “right’ way, I would say its pretty close.

      Hopefully, if all goes well this weekend, I will install the exhaust on my Gen III and test the temperatures with the Gen IV exhaust system. Then I will compare it to the heat emitting from my Gen V. Thought I would break this up into two post as its kind of long and I didn’t want to forget any information.

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