Thread: Calling All Header Experts!

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  1. #21 Re: Calling All Header Experts! 
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    Quote Originally Posted by GTPpower View Post
    Too bad it wasn't the same day. You easily could make 25 hp difference on these cars due to weather.
    I'd like to see where you get those kind of weather differences, because the reality I lived in for about 10yrs of building and dynoing these things didn't show that, especially with stable near stock setups.

    I get that you're going to continue reaching to find a way to disprove simple things that I explicitly hit the dyno to prove. There's nothing I can say or show you further to pull you out of that headspace, so I'm content having done what I've done, and had the success I did. My same GTP eventually hit 333.5whp with stock heads and non-I/C, using just an XP, GenV, 2.7", 42# inj, and dropped catback. The headers worked just as good as any other with similar specs. I even tested ported manifolds the same day as the stock mani dyno, and saw ~3-5whp gain on a setup going 13.3 with the PEM's at the time.

    I don't know why I took the bait, but it's kept me entertained between yard work chores, so oh well.
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  2. #22 Re: Calling All Header Experts! 
    GXP Level Member GTPpower's Avatar
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    Well, I can do the math for you to show the difference, but we've all driven these cars on hot days and cold days and felt the drastic difference.

    Scans of the pulls and weather conditions would help determine if there actually was a difference.
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  3. #23 Re: Calling All Header Experts! 
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    Let's see, I can dig through old hard drives hoping to find 15yr old scans, check their date stamps, go to a weather archive site to find temp and baro #'s, pretend to ignore knowing anything about engineering, thermodynamics, and laboratory testing... So you can find a new way to disagree...

    Or I can offer:
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  4. #24 Re: Calling All Header Experts! 
    GXP Level Member GTPpower's Avatar
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    I understand that stuff probably doesn't exist at this point, unless you made an effort to save it. I get it...we barely had computers...that stuff just wasn't recorded.


    But if you'd like to talk engineering and thermodynamics, we can do that. There is no lab testing on this, so we can forget that.

    There is zero scientific reason that headers would show any kind of a significant gain.
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