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360 challenge header dyno

Discussion in 'Challenge/GT Cars/Track' started by RotarySwingGolf, Nov 10, 2014.

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  1. RotarySwingGolf

    RotarySwingGolf Formula Junior

    Dec 24, 2011
    490
    Florida and Idaho
    #1 RotarySwingGolf, Nov 10, 2014
    Has anyone done a before and after dyno after replacing the factory headers with fabspeed or agency power? Since there are no precats in the challenge headers I don't see how much of a difference the collector is going to make over ferraris design as fabspeed claims about 20+ hp gain over stock but I'm sure that's over a street car header with precats
     
  2. rmarchjr

    rmarchjr Formula Junior

    May 21, 2012
    586
    North east, USA
    #2 rmarchjr, Nov 19, 2014
    I also switch from stock to fabspeed with no noticeable difference. I actually thought the motor reved slower with the fabspeed, but to be fair I did not dyno before and after. My stock headers blew one of the welded in bungs right out, so at least the fabspeed should last without failure. They appear much stronger then Ferrarri's.

    Traqmate data also did not show any improvement- actually a small lose in peak hp & tq , but again an accelerometer isn't a dyno. Also I made no fueling or ignition adjustments after install and that may be necessary going from 4-2-1 headers to 4-1 headers.
     
  3. RotarySwingGolf

    RotarySwingGolf Formula Junior

    Dec 24, 2011
    490
    Florida and Idaho
    #3 RotarySwingGolf, Nov 19, 2014
    That's about what I expected, so thanks for posting. I think the only real gain is if you have precats to get rid of the restriction. I also don't think a tune would do anything in this case.
     

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