WTA : Abis PnP performance menurun, MUNGKIN kah?
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  1. #1
    Sersan Mayor
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    WTA : Abis PnP performance menurun, MUNGKIN kah?

    Dear senior2 sekalian,
    Mohon masukan nya donk..

    Mobil saya Lancer CK4
    Baru abis PnP,
    Tp komponen2 yg lain blm diganti,spt air filter,pengapian,exhaust masih standar semua..

    Beda dengan sebelum PnP,skrg kalo di atas RPM 2000,makin ditarik malah makin ilang power nya,srasa ngedenn gitu..pdhl mesin udah teriak2..
    Digeber abis2an buat dapet 160kmph rasanya ngos2an bgt..

    Kemungkinan nya apa aja yah?
    Ada yg bilang itu krn blm ganti komponen pendukung lain nya spt air filter,pengapian dan exhaust,bener kah??
    Logika nya kan walau blm ganti komponen pendukung lain,atleast ada sedikit penambahan power lha setelah PnP


    Mohon masukan nya
    Terima Kasih

  2. Delapan Satu
  3. #2
    Letnan Dua
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    Pnp kan kerjaan tangan bro, jadi bisa aja gagal....
    coba minta dicek n stel2 ulang aja bro, sapa tau emang ada yg gk beres...
    cek juga kopling, sapa tau juga udah abis....
     

  4. #3
    Sersan Mayor
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    cek apa nya yah boss?
    Kmrn abis stel ulang klep,tp msh gitu jg..
    Kemungkinan bisa kopling ya boss??
    Thanks masukan nya..
     

  5. #4
    Sersan Kepala
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    Klo mnurut gw sih coba ganti header deh bos sm di cek lagi stelan klep nya..krna stelah pnp mungkin power makin gede,tetapi ketahan di sistem pembuangan..bsa jga stelan klep yg kurang pas,coba aj distel lagi..stau gw pnp itu cuma diambil kulit jeruknya aj,beda sm klo pnp trus papas head..smoga bguna gan info nya..:smt067:smt067
     

  6. #5
    Kopral Satu
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    coba cek koplingnya dulu boss...
     

  7. #6
    Sersan Kepala
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    PnP kalo kegedean ukuran valvenya ya ngempos bos....
    sama kayak pipa exhaust kalo kegedean ngempos....
    kecepatan udara berkurang.... = tenaga turun...
    PnP jgn di bengkel sembarangan
     

  8. #7
    Sersan Mayor
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    Thanks impo nya boss boss..
    Worst case
    bukan krn exhaust n kopling tapi ngempos kaya yg dibilang boss gsuwandi td,solusi nya gmn yah?
    Serem euy..
     

  9. #8
    Kolonel
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    mungkin perlu Dastek/Piggyback bro...
    coz ecu standart mungkin ga bisa ngebaca perubahan, alhasil udaran n bhn bkr kacau...
    sorry nuwbie, mungkin slaah..
    maap.
    peace
    tx
     

  10. #9
    Kopral Kepala
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    PnP kalo kegedean ukuran portingnya,
    tenaga malah ngempos.

    BTW. Ni ada link bagus untuk jadi bahan referensi kalo mo pnp:
    http://www.modifikasi.com/showthread.php?t=123612

    It is popularly held that enlarging the ports to the maximum possible size and applying a mirror finish is what porting is.
    However that is not so. Some ports may be enlarged to their maximum possible size (in keeping with the highest level of aerodynamic efficiency) but those engines are highly developed very high speed units where the actual size of the ports has become a restriction.

    Often the size of the port is reduced to increase power
    .

    A mirror finish of the port does not provide the increase that intuition would suggest.


    In fact, within intake systems, the surface is usually deliberately textured to a degree of uniform roughness to encourage fuel deposited on the port walls to evaporate quickly.

    A rough surface on selected areas of the port may also alter flow by energizing the boundary layer, which can alter the flow path noticeably, possibly increasing flow.

    This is similar to what the dimples on a golf ball do. Flow bench testing shows that the difference between a mirror finished intake port and a rough textured port is typically less than 1%.

    The difference between a smooth to the touch port and an optically mirrored surface is not measurable by ordinary means.
    Exhaust ports may be smooth finished because of the dry gas flow and in the interest of minimizing exhaust by-product build-up.

    A 300 - 400 Grit finish followed by a light buff is generally accepted to be representative of a near optimal finish for exhaust gas ports.

    The reason that polished ports are not advantageous from a flow standpoint is that at the interface between the metal wall and the air, the air speed is ZERO (see boundary layer and laminar flow). This is due to the wetting action of the air and indeed all fluids.

    The first layer of molecules adheres to the wall and does not move significantly.
    The rest of the flow field must shear past which develops a velocity profile (or gradient) across the duct.

    In order for surface roughness to impact flow appreciably, the high spots must be high enough to protrude into the faster moving air toward the center. Only a very rough surface does this.
     

  11. #10
    Letnan Dua
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    uhmmm...selesai PnP ga di Dyno boss??PnP kalo ampe salah itungan bs juga buat drop performa,coba test di gigi 4 pas pindah ke 5,liat ada penambahan tenaga ga?mobil gw CK4 jg stlh di PnP tarikan gigi 5 lbh ngisi hehehe.
     

 

 
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