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How many last bottom end after header install.

This is a discussion on How many last bottom end after header install. within the External Engine forums, part of the LSx Technical Help Section category; I have just heard that alot is last on the bottom end when installing long tube headers on the LS1 ...

  1. #1
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    pewter
    99 Trans Am

    Question How many last bottom end after header install.

    I have just heard that alot is last on the bottom end when installing long tube headers on the LS1 motors. Is this true? and if so, just how much lost is it? and how long can I run the car without getting it tuned?

  2. #2
    Member patricksd's Avatar
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    Navy Blue Metallic
    2001 Camaro Z28 M6 T-Top

    I just had Pacesetter LT's installed, and didn't notice any loss on the bottom. But then again, the car never felt like it had tons of torque below 2500 rpm's.

    The big difference is in the mid to high rpm range - VERY noticeable.

  3. #3
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    You will not loose much down below and you will gain alot from the middle to the top!

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    Slow'er'Ass Mr. Luos's Avatar
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    As long as you get properly sized primaries (1 3/4" for most apps) you won't loose low end.

  5. #5
    Member anniversary30's Avatar
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    If it is tuned correctly wouldn't it be bennificial all the way around ? I know my touque and HP went up.

  6. #6
    Pathelogical Liar BlackLT1Z28's Avatar
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    Usually, with longtubes, you will lose some low-end torque, but gain some top-end power.

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