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Thread: headers

  1. #1
    Join Date
    Jan 2011
    Location
    beirut, lebanon
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    248

    headers

    today i got a pair of headers and am installing them on the zhp , how much power would they give ? and would they give a nice voice?

  2. #2
    Join Date
    Mar 2011
    Location
    Baltimore, MD
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    6,940
    Should net about 10-20 whp. Next step is a tune and/or some O2 sensor spacers to keep the CEL off.
    Porsche 944 Turbo Build

    One ride and you'll understand why most rocket scientists are German.

    My ZHP Build 2004-2014 RIP


  3. #3
    Join Date
    Jan 1970
    Location
    Liberty Township, OH
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    37,935
    Exhaust also?

    HTC Thunderbolt+TT
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs l Maple Interior Trim

  4. #4
    Join Date
    Jan 1970
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    32.8 N, 117.3 W
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    7,640
    Also get better intake + high flow throttle body

  5. #5
    Join Date
    Mar 2011
    Location
    East Greenwich, RI
    Posts
    87
    Headers open these cars up so much. I gained a ton of top end and ended up with 212rwhp on a "mustang dyno" with only headers and a full 3" back.

  6. #6
    Join Date
    Mar 2011
    Location
    Phoenix, AZ
    Posts
    825
    Quote Originally Posted by Hermes View Post
    Also get better intake + high flow throttle body
    Has a High Flow Throttle body been shown to improve anything on our cars? I am hearing that the bore is negligible as are the gains.

    I am saying this even though I am currently running the Dinan High Flow TB on my car right now, pulling air from a GruppeM intake


    I really have no idea what I am doing

  7. #7
    Join Date
    Jan 1970
    Location
    32.8 N, 117.3 W
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    7,640
    Probably hard to find info since I doubt anybody only installs that piece. In theory it should smooth the air flow, allowing the air density to be higher as it hits the intake manifold. To me it seems like a part that has to be matched with others so you increase the total gain in the system. That's why I said to pair it with the intake and headers

  8. #8
    Join Date
    Mar 2011
    Location
    Baltimore, MD
    Posts
    6,940
    Changing the TB on a 330 won't do you much good. The head is the most restrictive part of the engine...I'd spend all of my money on having the head flowbench engineered for the most gains with your headers/cams/injector combo. Worry about the small stuff is like a rocking chair...you know the rest.
    Porsche 944 Turbo Build

    One ride and you'll understand why most rocket scientists are German.

    My ZHP Build 2004-2014 RIP


  9. #9
    nike001 Guest
    I've thought about the whole headers thing. I guess that most of you can tell how that ended up. The gains in horsepower are not worth a CEL light, and a smelly exhaust. Not to mention how much rasp these things give out, along with the amount of un-flattering noise that comes from the tail pipe.

  10. #10
    Join Date
    Mar 2011
    Location
    Baltimore, MD
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    6,940
    All you need to combat the CEL is an Innovate LC-1 wideband o2 sensor. As for the smell...well you just need to make sure everything is sealed up tight and learn to deal with the performance gains
    Porsche 944 Turbo Build

    One ride and you'll understand why most rocket scientists are German.

    My ZHP Build 2004-2014 RIP


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