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 injector

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keba
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keba

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PostSubject: injector   injector - Page 2 Icon_minitime6/3/2011, 8:39 pm

First topic message reminder :

injector - Page 2 Injector%20001
injector - Page 2 Mmfp_0711_05_z+1993_ford_mustang_LX+intake_manifold

injector atau alat suntikan bahan api ialah alat yg mnyuntik bhn api
ke dlm kebuk pembakaran utk dicampur dgn udara n dinyalakn oleh
percikan (spark) oleh palam pencucuh. ada 2 cara modifikasi thadap
injector iaitu dgn menambah atau menukar injector. jika menambah
injector, tempat yg plg sesuai utk dpasang adalh antara t/body n
torbo@supercas@air filter. jika menukar injector, setiap injector asal
dtanggalkn n injector baru dpasang. ingin sy tegaskn, modifikasi pd bahagian
injector adalh berbaloi sekiranya enjin anda telah diubahsuai terutamany
enjin bkuasa torbo atau enjin NA yg mampu rev dgn tinggi.

injector asal smestiny x dpt mnampung kperluan bhn api enjin yg telah
diubahsuai. kapasiti injector bgantung kpd kuasa enjin, tekanan bhn api
fuel pump n juga tekanan dari fuel regulator. lebih besar tekanan bhn api,
lebih besar kapasiti injector yg dperlukan. jika tidak, enjin anda mgkin
mngalami masalh 'lean' d mana air fuel ratio adalh kurang drp idle (14.7).

utk modifikasi penambahan injector (extra injector), ia hny dgunakan apabila
anda mgunakn enjin yg dilaras pd boost yg tinggi. lazimny extra injector dpasang
di mulut t/body n kawalanny dkawal mgunakan additional injector controller (AIC)
atau dgn ecu yg boleh diprogram spenuhnya (standalone). ubahsuai sbegini
smakin kurang popular kerana kapasiti injector yg lebih tinggi mudah ddapati.

jadi, bagaimana utk mngetahui kapasiti injector yg harus anda gunakan? kapasiti
injector ini boleh dtentukan mlalui formula Injector Flow.


Injector Flow = (Horsepower x BSFC) ÷ (No. of Cycle x Duty Cycle)

BSFC bmaksud brake specific fuel consumption yg mnerangkan tahap keberkesanan
enjin (engine efficiency). secara purata, BSFC bg enjin NA adalh 0.5 (50%) manakala
bg enjin torbo atau supercas adalh 0.65 (65%). Duty Cyle pula mnunjukkan brp kali
injector memancitkan bhn api. bg enjin 4 stroke, Duty Cycle adalh 0.8.

sbg cntoh, anda boleh mngira horsepower enjin anda dgn mgunakan psamaan:


Power = 2π N T

N adalh rpm optimum enjin
T adalh max torque enjin


contohny jika enjin anda mpunyai 200hp (OTE), kiraannya adalh:

Injector Flow = (200 x 0.4) ÷ (4 x 0.8)
Injector Flow = 31.25 paun (1 injector)

utk menukar kpd cc, Injector Flow x 10.5
kapasiti injector (CC) = 31.25 x 10.5 = 328cc


jadi, kapasiti minimum injector yg anda perlukan adalh 328cc.


Last edited by keba on 9/3/2011, 7:53 pm; edited 2 times in total
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keba
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keba

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PostSubject: Re: injector   injector - Page 2 Icon_minitime25/6/2012, 11:46 pm

AIRpulse wrote:
ohhh thanks bro..nampaknya nda fail juga math saya hehehe..

injector L5 besar sikit ya..tu jbjl punya ke?
yupt. yg 4 piston je. kalau L5 3 piston sama ngan L2 190cc
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AIRpulse
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AIRpulse

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PostSubject: Re: injector   injector - Page 2 Icon_minitime26/6/2012, 10:24 am

oh begitu.

eh..secara teori jbjl sepatutnya hasilkan lebih power dari enjin 3 piston..kenapa hp enjin jbjl hampir sama saja dengan enjin l2?
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keba
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keba

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PostSubject: Re: injector   injector - Page 2 Icon_minitime4/7/2012, 7:59 pm

AIRpulse wrote:
oh begitu.

eh..secara teori jbjl sepatutnya hasilkan lebih power dari enjin 3 piston..kenapa hp enjin jbjl hampir sama saja dengan enjin l2?
sb kuota hp utk compact car d jepun 64hp shj. xbleh lbih
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AIRpulse
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AIRpulse

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PostSubject: Re: injector   injector - Page 2 Icon_minitime10/7/2012, 4:56 pm

jadi kalau dikasi unlock powernya patut lagi power dari l2 kan?
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keba
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keba

Male
Countries/State : Kelantan
Age : 34
location : Kemaman - Kota Bharu
Website : contact 01119778382
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Points : 14943
Reputation : 69
Number of posts : 3981

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PostSubject: Re: injector   injector - Page 2 Icon_minitime10/7/2012, 5:57 pm

AIRpulse wrote:
jadi kalau dikasi unlock powernya patut lagi power dari l2 kan?
kalau L5 n L2 standard da up boost, mmg L5 lg power. Very Happy
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lee87
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PostSubject: Re: injector   injector - Page 2 Icon_minitime18/10/2013, 6:43 pm

salam otai2 semua... pivot speed meter tu boleh jugak buang speed cut kan, jadi saya nak tanya lau dah buang speed cut guna pivot speed meter tu bah adakah fuel cut pun terbuang dgn sendiri nya macam apexi rsm?
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jezzboyz
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PostSubject: Re: injector   injector - Page 2 Icon_minitime20/10/2013, 2:21 pm

kala pakai injector saiz besar xpe ke? contohnya kat kancil pakai injector camri ke. alphard ke.. boleh x? sbb ade pernah dengar. orang kate kala pakai injector besar nih minyak boleh save... xtaw betul ke x, dengar2 jea nih...
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