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 injector

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keba
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PostSubject: injector   6/3/2011, 8:39 pm




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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im
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PostSubject: Re: injector   6/3/2011, 9:08 pm

info yang bagus ni bro, thanx Bagus

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Kornurts
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PostSubject: Re: injector   6/3/2011, 10:23 pm

yaa..mmg bgus info ni tau...good job bro...klu kancil 660 N/A ada injector ka bro?klu ada,d mana letaknya? Suspect
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keba
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PostSubject: Re: injector   7/3/2011, 12:08 am

kornurts: injector hnya tdapat pd kereta yg ad ecu(efi)..sb kalau xdak ecu, xbleh nk control injector..
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Kornurts
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PostSubject: Re: injector   7/3/2011, 7:23 am

oo..bgtu rupanya bro...hehehe..sy pn x tau sgt ttg kreta ni..thanks ya... Cool
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keba
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PostSubject: Re: injector   7/3/2011, 1:10 pm

sama2 bro..xpa kita sam2 blaja cheers
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Skyz
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PostSubject: Re: injector   23/3/2011, 10:11 pm

ya god informatiom...thanks ya bro keba.... Very Happy
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Shinigami_TWU
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PostSubject: Re: injector   23/3/2011, 10:24 pm

thanks da info bro keba... mksdnya yg pakai carb mmg xda injector la tu kan.??
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PostSubject: Re: injector   27/3/2011, 4:10 am

akufiq wrote:
thanks da info bro keba... mksdnya yg pakai carb mmg xda injector la tu kan.??
xdak bos..carb x pakai injector sb injector suda tmasuk dlm kelas elektronik (perlu ada ecu)
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Shinigami_TWU
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PostSubject: Re: injector   27/3/2011, 11:05 am

owh macam gtu ya... Mksdnya enjin Carb ne xda kwl mnyk yg msk enjin la ne kan?? xda fuel cut la mksdnya... Law injector ada fuel cut kan? sbb mnyk msk enjin dikawal oleh ecu... gtu ka bro??
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Skyz
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PostSubject: Re: injector   27/3/2011, 11:22 pm

ya betul tu akufiq..tapi ecu masih boleh d tune dan buang fuel cut tu...just plug p computer sdh boleh set dari sna..tapi kena suruh org yg pandai tune ja... Very Happy
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PostSubject: Re: injector   1/4/2011, 12:10 pm

btol tu bos..utk buang fuel cut, bleg funakn alat2 macam piggyback
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Skyz
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PostSubject: Re: injector   1/4/2011, 7:28 pm

slalunya berapa upah mau set ecu tu bro keba?? tuk buang fuel cut tu??
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keba
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PostSubject: Re: injector   2/4/2011, 1:04 am

utk buang speed cut, ad bnyk cara...
plg senang, pasang trus RSM(utk buang speed cut)..
bila suda buang speed cut, fuel cut pn otomatik akan ilang..
utk kancil l2s, ad yg pkai fuel cut defencer (sambg dgn ecu asal), kos dlm rm150..
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Skyz
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PostSubject: Re: injector   2/4/2011, 7:41 pm

tak la jga mahal betul kan...kira berbaloi la jga...
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keba
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PostSubject: Re: injector   3/4/2011, 4:47 pm

tu utk kancil bha..kalau kereta lain, laen hrga..hehe..
ad 1 cara lg, bleh pakai Speed Limiter Defencer SLD..
slalu, enjin2 proton merce bmw bleh pkai yg ni..kos tu x pasti la brp..huhu
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Skyz
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PostSubject: Re: injector   5/4/2011, 2:15 pm

oh ya standard injector viva berapa cc dia tu ahh??
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keba
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PostSubject: Re: injector   5/4/2011, 9:19 pm

x kompom la bos..tgk cc jgk..kalau 1.0, lbih krg injector kelisa jgk..180cc kalau x silap
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PostSubject: Re: injector   5/4/2011, 11:15 pm

Ok thanks...
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keba
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PostSubject: Re: injector   6/4/2011, 10:55 pm

kalau nk up sikit, bleh pkai injector kelisa 1.0 auto..rasany 210cc or 220cc
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Skyz
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PostSubject: Re: injector   7/4/2011, 9:39 am

Ada beza rupanya manual dgn auto punya injector ahh..
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keba
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PostSubject: Re: injector   7/4/2011, 11:21 am

tu la..sa pn dpt tau kat sioloon jgk..hehe
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PostSubject: Re: injector   16/6/2012, 3:43 pm

bro keba..saya cuba kira injector standart utk enjin l2..

kalau salah tolong bagitau ya..stendet HP dlm 67HP macam tu kan? so..


(67 x 0.65)/(3 x 0.8)

(43.55) / (2.4)

= 18.15

18.15 x 10.5 = 190cc

betul ke? injector standart l2 190cc?
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keba
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PostSubject: Re: injector   24/6/2012, 9:43 pm

AIRpulse wrote:
bro keba..saya cuba kira injector standart utk enjin l2..

kalau salah tolong bagitau ya..stendet HP dlm 67HP macam tu kan? so..


(67 x 0.65)/(3 x 0.8)

(43.55) / (2.4)

= 18.15

18.15 x 10.5 = 190cc
yupt. btol. kalau injector L5 L6 L7 L8 L9 195cc

betul ke? injector standart l2 190cc?
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PostSubject: Re: injector   25/6/2012, 8:19 pm

ohhh thanks bro..nampaknya nda fail juga math saya hehehe..

injector L5 besar sikit ya..tu jbjl punya ke?
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