Domin ƙara ƙarfin dawakai da ƙaura na Corvette ZR-1, Phil Wasinger ya fara kera injin ɗin sa lokacin da ya sami injin LT5 da aka yi amfani da shi akan Craigslist a cikin 2014. Dubi abin da ya faru da wannan aikin na shekaru shida.
Saboda ƙayyadaddun ƙira da ƙayyadaddun samarwa na 1990-1995 ZR-1 Corvettes, injin LT5 da ake nema a zahiri bai ji daɗin wasan kwaikwayon bayan kasuwa kamar Chevrolet, Chrysler da sauran injunan samar da jama'a na Ford ba. Duk da haka, wannan bai hana shi ba. Phil Wasinger ya sake gina injinsa na LT5 a cikin 1994 ZR-1 Corvette.
Babban manufar injin LT5 shine lokacin da Lotus Engineering (mallakar GM a lokacin) ya kera LT5, GM ya dage cewa suyi amfani da tazarar ramin silinda iri ɗaya, tsayin shingen silinda, da crankshaft babban diamita na rami kamar SB Chevy. ko da yake in ba haka ba, Yana da mabanbanta injin ƙira, sai dai hatimin crankshaft na baya, babu sassa na gama gari a tsakanin su. Lokacin barin masana'anta, shingen silinda na LT5 yana ɗaukar ƙirar bene mai buɗewa, kuma ƙananan shingen silinda an hako shi don ɗaukar 4.173 OD matakin aluminum.
An fara sake gina injin Wasinger a cikin 2014, lokacin da ya samo injin LT5 da aka yi amfani da shi akan Craigslist.
"Na sayi 1994 Corvette ZR-1 na a cikin 2007 kuma na inganta injin tare da gyare-gyaren gyare-gyare na yau da kullum wanda ya dace da waɗannan injunan na musamman," in ji Wasinger. "Wannan ya hada da dogon bututun kai, aikin catback shaye, shan tashar jiragen ruwa, da na'urorin kunna wasan kwaikwayo. Don cidin 350, yawancin injunan hannun jari suna aiki da kyau, suna fitar da kusan ƙarfin dawakai 485, kuma cikin sauƙin juya zuwa 7,200 rpm. Koyaya, ina son ganin abin da ƙirar injin DOHC LT5 zai iya yi ta ƙara ƙaura, shugabannin silinda, da kyamarorin aikin al'ada. Wannan ya fara tafiya ta na shekaru 6 na almara na 427 cid LT5."
Dangane da masana'antar injin, Phil ba DIYer bane na yau da kullun. Yawancin aikinsa, ya yi aiki da manyan masana'antun injin diesel na Jamus MTU Friedrichshafen da MAN Augsburg, wanda ke jagorantar ayyukansu a Amurka. Sojojin ruwa na Amurka, da masu tsaron gabar tekun Amurka da Kamfanin jigilar kayayyaki na Tutar Amurka su ne manyan abokan cinikinsa.
Koyaya, ba kamar aikin da ya yi a cikin aikinsa ba, wannan ginin na LT5 wani aikin sha'awa ne na kansa, wanda akasari ana yi a garejin dangin Phil. Aikin na'ura da ma'auni an yi shi ne a cikin bitar sarrafa injin ɗinsa kusa da garinsu a Fairfax, Virginia, a arewacin Virginia. Da farko, Phil ya san yana son ƙarin ƙarfin dawakai da ƙarin ƙaura.
"Manufarmu ita ce samar da ingantaccen dawaki 650 mai santsi kuma abin dogaro ga titi da balaguro," in ji Vasinger. "Saboda ƙirar musamman na LT5, dole ne a yi amfani da crankshaft ɗin bugun jini daga sarari. Ƙwaƙwalwar crankshaft yana da adadi mai yawa na rijiyoyin burtsatse na ciki a matsayin tashar rarraba man fetur kawai don babban abin ɗamara da haɗin sanda. An yi sa'a, ni daga wani mutum ne a Texas Maigidan ya sami billet 4.00 na karfe da ba a yi amfani da shi ba. Tun da farko ya saya don sigar LT5, amma ya kasa gane ta.
"Don yin amfani da crankshaft bugun jini na 4.000 don isa ga maƙasudin cidar 427, dole ne a ƙara ƙarar silinda daga 3.90 zuwa 4.125, wanda ke buƙatar faɗaɗa ƙwayar mai karɓar silinda. Don wannan, na juya ga Pete Polatsidis, ƙwararren injiniyan LT5 a Chicago, Ya ƙera rufaffiyar bene mai rufaffiyar bushing bushing da Darton Sleeves don injin LT5."
An tsara shingen silinda na LT5 don amfani da bushings na aluminum 99mm da pistons da MAHLE ke samarwa. An lulluɓe saman rufin ciki da Nikasil don samar da ƙasa mai jurewa mai dorewa. Tsarin tsari shine ƙirar bene mai buɗewa tare da ƙananan ɓangaren layin da ke zamewa a cikin ramin mai karɓa wanda aka ƙera zuwa kasan toshe.
Domin cimma rami mai lamba 4.125 da Phil yake so, ya zama dole a yi amfani da wani rufin ƙarfe na musamman da aka gyara wanda Darton Sleeves ya samar kuma Pete Polatsidis ya inganta don amfani da ƙirar bene mai rufaffiyar.
"Tare da wannan rufaffiyar bene mai rufi, diamita na ciki na Silinda za a iya ƙara shi lafiya zuwa 4.125, kuma sauran fa'idar ita ce ta fi kwanciyar hankali a cikin silinda," in ji shi.
Bayan fahimtar crankshaft da motsin injin, Phil ya mai da hankalinsa ga sauran abubuwan ciki, irin su 6-inch billet haɗa sanduna kowanne yana auna gram 605, haɗe tare da al'ada Diamond ƙirƙira pistons aluminum tare da siket coatings da diyya fil.
Wasinger ya ce "Piston yana da rabon matsawa na 12: 1, kuma fil ɗin kashewa da suturar siket an tsara su musamman don rage hayaniyar piston mai sanyi," in ji Wasinger. "Na kuma yi amfani da Total Seal piston zobe - zoben molybdenum na sama mai nauyin 1.5mm, mazugi na 1.5mm mai jujjuya zobe na biyu, da zoben sarrafa mai na 3mm."
Sigar LT5 kuma ta sami Calico mai rufi bearings-OEM akan babban wutar lantarki da 2.1 mai rufin Clevite 77 akan sanda. An shigar da ƙyalli na jarida tsakanin igiyar sanda da babban ɗaki a 0.0025.
Lokacin da ya zo ga shugabannin Silinda da jiragen kasa na bawul, Phil ya nuna cewa ɗakin konewar LT5 mai bawul huɗu na silinda an ƙera shi don ya zama mai ƙoƙartawa sosai, yana ba da damar yin amfani da ƙimar matsawa mafi girma yayin fitar da iska. Don haɓaka saitinsa, an dasa kan silinda gaba ɗaya kuma an gwada kwararar ruwa. Ana buɗe mashigar iska har zuwa 37 mm, kuma kwanon shigar iska kuma yana ƙara girma.
"An maye gurbin bawul ɗin shan ruwa na asali na 39mm da bawul ɗin bakin karfe na Ferrea na 42mm tare da karan 8mm," in ji shi. “An kuma faɗaɗa wurin zama na ɗaukar bawul don cin gajiyar babbar bawul ɗin sha. Na kuma yi amfani da maɓuɓɓugan Ferrea da masu riƙewa."
Domin sanya injin bawul ɗin ya yi aiki da kyau, Wasinger ya zaɓi camshaft billet na al'ada daga Jones Cam Design. Baya ga nasa aikin, Phil ya ce ma'auni na kayan aikin juyawa da aikin bawul ɗin kan silinda na al'ada an yi shi a cikin gida ta Lloyd Lovelace na Injin Motoci na Custom a Lorton, Virginia. Haibeck Automotive Technology ne ya gudanar da wasan karshe na gyaran gyare-gyaren dynamometer a Addison, Illinois.
Bayan an gama hada LT5 da gyara, Wasinger ya ce ya samu karfin dawaki 650 da yake fata. Yanzu, wannan 1994 ZR-1 Corvette ya dawo kan titi.
A wannan makon PennGrade Motor Oil, Elring - Das Original da Scat Crankshafts ne suka dauki nauyin injin. Idan kuna da injin da kuke son haskakawa a cikin wannan jerin, da fatan za a aika imel zuwa [email protected] editan Injin Gina Greg Jones
Lokacin aikawa: Satumba-13-2021
