Everand Logo

Welcome to Everand!

  • Hemmings Muscle Machines

    ASK RAY

    Jun 27, 2022 6 minutes
    By Ray Bohacz

    CONVERTER LOGIC

    Q: Your article in the May issue inspired this question. I have a V-6-powered 1997 Mustang that I used to autocross. I am planning on autocrossing again this summer. As the car is 25 years old, it does not have to pass emissions tests here in Ohio. It has two catalytic converters from the factory and a dual exhaust system I put on. Maintaining good low-end torque is a top priority. Would I be better off if I removed the catalysts or replaced them with new ones, possibly high-performance cats if they are available? I always thought maintaining good exhaust back pressure would help make higher torque. Is this correct?

    Al Cooke

    Cleveland, Ohio

    A: You will be able to answer the question yourself after I provide some background. Back pressure is an opposition to flow. If opposition to flow made torque, every engine manufacturer would have a method to control the exhaust flow from the engine, which

    You’re reading a preview, subscribe to read more.

    More from Hemmings Muscle Machines

    Hemmings Muscle Machines2 min read
    Hemmings Muscle Machines
    Jonathan Shaw, President Matthew Boice, Senior Vice President of Media EDITORIAL Douglas R. Glad, Head of ContentDan Stoner, Creative DirectorTerry McGean, Editor-in-Chief, Hemmings Muscle MachinesJerry Pitt, Managing EditorEvan Perkins, Director o
    Hemmings Muscle Machines4 min read
    Swap Meet
    Q: My 1969 Nova with the 283-cu.in. V-8 engine needs a transmission, and a friend has a Saginaw four-speed I can “borrow” until I can afford the Tremec five-speed I want to eventually install. Is there an aftermarket bellhousing I can purchase now th
    Hemmings Muscle Machines7 min read
    Barrett-jackson Scottsdale, Arizona
    BARRETT-JACKSON’S numbers speak loudly, clearly, and through a bullhorn: The collector car market remains strong, and muscle cars are still a powerful element of that market. Their sales results of $207.6 million in January 2024 beats the auction hou

    Related