Headers

Discussion in 'E3 General Discussion' started by Mot27cars, Feb 12, 2019.

  1. Mot27cars

    Mot27cars Member

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  2. Stevehose

    Stevehose Well-Known Member Site Donor $

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    Belgiumbarry Well-Known Member

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  4. Mot27cars

    Mot27cars Member

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  5. teahead

    teahead aka "Rob" Site Donor

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    I hear they require frame clearance and some tube banging.
     
  6. Bert Poliakoff

    Bert Poliakoff Active Member Site Donor

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    They are 2" headers IIRC and there is nothing to be gained from them, maybe even a power loss. Just eye candy at best.
     
  7. Bearmw

    Bearmw New Member

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    I agree with Bert but would add that they might help with a higher compression 3.5.
     
  8. Bert Poliakoff

    Bert Poliakoff Active Member Site Donor

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    A 2" header is for a major balls to the wall motor. 1 1/2" is probably the max with 1 3/8" on a stock motor.
     
  9. Bearmw

    Bearmw New Member

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    I was under the impression that the primaries are closer to 1.5" and the collector is about 2". Does that seem too big for a mid-level 3.5?
     
  10. Bert Poliakoff

    Bert Poliakoff Active Member Site Donor

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    If that is so, and you can live with it,you will possibly lose some low end torque.You probably will not gain anything from the headers. Other members will chime in but my understanding is, 1 3/8 is the number for a stock motor. If you go bigger you may start to lose low end torque. SF Don?/
     
  11. Gransin

    Gransin Well-Known Member Site Donor

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    Compared to the stahl headers, these ones are shorter before it reaches the collector, so I don't think you can compare the size of primaries based on just the diameter, you should also take lenght into the calculation.
    It's about the total volume, but I might be wrong:)
     
  12. Belgiumbarry

    Belgiumbarry Well-Known Member

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    they are... if i may calculate that way : primaries 1.5 x 25.4 mm = 38.1 mm . ( outside 40 mm )
    collector 2 x 25.4 mm = 50.8 mm ( outside 50 mm )
     

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