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  1. #1
    Join Date
    Sep 2009
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    Loss of back pressure = loss of low end torque?

    I have read many posts concerning the loss of low end torque when modifying the SRT8 factory exhaust with something more free-flowing. My question is, will this phenomenon be "seat of the pants" noticable in an otherwise unmodified power plant? I can see how a heavily modded powertrain (cam, heads, nitrous, etc.) might suffer some apparent torque loss. If I bolt on a pair of Bob's glass pack reso replacement pipes (GP300x4) am I going to "feel" a torque loss in my pretty much stock 6.1?
    2007 Magnum SRT8 TorRed One of One Hundred Sixty Five!
    Mopar CAI & Strut Brace ~ Predator 93 Tune ~ BT Catch Can, Interior Goodies, Nose Badge, Wheel Inserts ~ Blastin Bob's SRT8X4 Reso Tips ~ ACC Red LED Interior Kit ~ Demolded ~ Hankook Ventus ST 275/40/20 all around



  2. #2
    Join Date
    Aug 2007
    Location
    Dallas, TX
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    831
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    Please, not another back-pressure loss of tq thread.

    Run open headers and dyno the car and report back what the loss is.

  3. #3
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    Sep 2009
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    Thanks for your informative reply.

  4. #4
    Join Date
    Nov 2009
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    VA & NC
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    You should be fine with what you want to do. I have hi-flo mids on my SRT along with a JBA exhaust. Did i lose sum backpressure...sure did, but its very minimal. Had the car out yesterday hauln arse and got sideways very easy several times. Sitting at a standstill and stomping on it.....smoke show! I don`t even have a pred, let alone a tune

  5. #5
    Join Date
    Sep 2009
    Location
    Quebec, Canada
    Posts
    190
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    Quote Originally Posted by Buc McMaster View Post
    Thanks for your informative reply.
    http://en.wikipedia.org/wiki/Scaveng...8automotive%29

  6. #6
    Join Date
    Nov 2006
    Posts
    720
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    While you can easily over exhaust an engine, this mod will not do that.

    Bob

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