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Thread: ZHP NA Project - More Power

  1. #21
    Quote Originally Posted by Sockethead View Post
    Looks great!
    BTW, when you get your headers in, your magnaflow exhaust is going to be much louder but really sounds bad ass at full throttle.
    I just installed that exhaust a few weeks ago. It was a little too loud for me so I installed the X-pipe muffler in place of the bare X-pipe... took away a lot of the drone and other annoying sounds that you get with catless headers. It still is pretty loud but sweet at full throttle...

    Here's a couple of threads about that exhaust from our own member rkneeshaw that make good reading:
    http://forum.e46fanatics.com/showthr...ight=magnaflow
    http://forum.e46fanatics.com/showthr...ight=magnaflow

    The X-pipe muffler I used is in the second link

    I viewed your links, the X Pipe magnaflow that i have is installed as a mufler in the rear it makes awesome sound. Can't wait to hear it with headers on and the intake.

    Better Intake + K&N -> Bigger ported intake ports = more fuel/air -> bigger explosion -> bigger exhaust ports -> bigger sound :D
    What i expect from intake is 5HP and headers at least 10HP at crank both, plus better throttle response. I also wonder if the ported head will make any difference (just curious about the port quality). That i will check on the dyno
    ZHP 2004 6M/T Silver Grey - BBS RGR R18 8.5 ET38 RG734H & 9J ET45 RG762H Forged - Gruppe M Air Intake - Supersprint Replica Headers - N52 TB - Ported Head - MS43 ECU - 7000RPM - Local Tune Flashed - Tein Street Advance Z Coilovers


  2. #22
    Join Date
    May 2011
    Location
    Charleston SC
    Posts
    6,148
    You're going to get a nice bump in torque too... That's what you gonna notice...
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
    M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
    H&R sport springs,
    UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
    Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers

  3. #23
    It's been a while The paint has arrived. I already sprayed one layer both on headers and the heat shield too.

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    I let it dry one day and today i will spray the second layer. Tomorrow i am going at the dyno to check the hp with the current setup.
    The only modifications at the moment from the stock are:

    1. Stock manifold without cats
    2. Ported Head (both inlet/outlet) by 2mm
    3. X-Pipe as mufler
    4. K&N filter in stock air filter box

    I am looking at about 192-196 HP at the wheels considering the above mods.
    The K&N filter will arrive tomorrow. At the weekend i am planning on installing the headers and the heatshield/K&N filter together to feel the HP gain :D

    After i am planning on dynoing the before and after results just to make sure how many HP i gained.
    ZHP 2004 6M/T Silver Grey - BBS RGR R18 8.5 ET38 RG734H & 9J ET45 RG762H Forged - Gruppe M Air Intake - Supersprint Replica Headers - N52 TB - Ported Head - MS43 ECU - 7000RPM - Local Tune Flashed - Tein Street Advance Z Coilovers


  4. #24
    Join Date
    May 2011
    Location
    Charleston SC
    Posts
    6,148
    Stock manifolds without cats?
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
    M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
    H&R sport springs,
    UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
    Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers

  5. #25
    Quote Originally Posted by Sockethead View Post
    Stock manifolds without cats?
    Yeap they have been de-catted by previous owner.

    More pics of ceramic coated headers



    Sent from my SM-G925F using Tapatalk
    ZHP 2004 6M/T Silver Grey - BBS RGR R18 8.5 ET38 RG734H & 9J ET45 RG762H Forged - Gruppe M Air Intake - Supersprint Replica Headers - N52 TB - Ported Head - MS43 ECU - 7000RPM - Local Tune Flashed - Tein Street Advance Z Coilovers


  6. #26
    Join Date
    Mar 2016
    Location
    Madison, Alabama
    Posts
    330
    At least if they ever get stolen. Your finger prints will claim them as your property
    Family that races together stays together
    2005 330Ci 6MT SGM (x2)

  7. #27
    Join Date
    Jan 1970
    Location
    Southern California
    Posts
    17,014
    Good werk!

    Sent from my SM-G955U using Tapatalk
    Randeaux/Rando/John/jr - '06 Cic ZHP; Southern California
    "ZHP or not, I still like you"


    ZHP Performance Package, Cold Weather Package, Leather, Jet Black/Black/BlackCube, NAV
    ESS Stage 1 Twin Screw Supercharger, Sprint Booster, BMW Perf Intake, Magnaflow Exhaust, Dinan TB & STEP S/W, Ground Control Coilovers, UCC Sway Bars, Apex EC-7 18x8.5 ET38
    Dynavin D99+, Hardwire V1 (w/V1 Connection), BSW Stage 1 Speakers, Kicker Amp/Subwoofer
    BMW Performance Strut Brace, Orion V2 Angel Eyes, No-holes License Plate, SMG Paddle Shift Mod, Besian VANOS, Gold DISA, Fan Delete, M3 Side Mirrors
    Note: Actual car no longer resembles signature picture

  8. #28
    Today i went and dynoed my car. The results were great 188 WHP, with a 20% loss it equals 235 HP. The main thing was that there was no power drop at 4200rpm which is common in ZHPs. Air Temp 24 Celsius

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    I also installed the K&N filter and my custom made heat shield

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    First impressions of K&N are that the pedal is more responsive at low rpms and it pulls much better past 4000rpm with a great sound. The shield keeps a steady temperature similar to the stock air box. Air flow to the filter is better as it feeds both from stock pipe from the mid also from the left brake hose.
    ZHP 2004 6M/T Silver Grey - BBS RGR R18 8.5 ET38 RG734H & 9J ET45 RG762H Forged - Gruppe M Air Intake - Supersprint Replica Headers - N52 TB - Ported Head - MS43 ECU - 7000RPM - Local Tune Flashed - Tein Street Advance Z Coilovers


  9. #29
    Join Date
    Jul 2011
    Location
    Toronto
    Posts
    679
    Any videos on how it sounds like now? I am interested in getting headers as well.

    -Daniel
    OEM BMW Performance (Missing cams and seats)
    LEVEL ONE // Euro Techniks
    Auto -> 6 Speed complete

  10. #30
    Join Date
    May 2011
    Location
    Charleston SC
    Posts
    6,148
    If you like quiet, you can stick with the stock exhaust. With headers, it's a little louder and a little raspier. I only got about a 7hp increase on the dyno with the Magnaflow system. Anything aftermarket is pretty loud
    Dinan CAI &Throttle body, ESS Tuning TS2, Bimmerbrakes gen3 headers, UUC SSK & DSSR. Achilles oil pump, VAC oil pan baffle
    M3 Motor mounts, UUC Trans mounts, Modified clutch style LSD 3.15, TMS front subframe reinforcement, Koni Yellow sports,
    H&R sport springs,
    UUC sway bars, BMW Perf. Rotors, UUC SS brake lines, Hawk HPS pads, CSL replica wheels,
    Rotora strut bar, FXR HID conversion, M3 Mirror conversion, BSW stage 1 speakers

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