Dukanmu mun ƙare son wani nau'in kiɗan, amma ga man fetur yana iya zama zaɓi mai ban sha'awa idan aka samar da wannan kiɗan ta injiniyoyi na gine-gine daban-daban.
Abu daya tabbatacce: da Karamin Toshe V8 Chevy's sun shafe shekaru 60 suna rera waka kuma za su ci gaba da rera waka, tare da sabuwar ZZ6 ita ce kururuwa na karshe, da kururuwa a cikin dogon layi.
Amma kafin mu je ga asalin, dole ne mu bar muku wasu la'akari, don ku iya fahimtar ainihin su Bambanci tsakanin V8 "Big Block" da V8 "Ƙananan Block" , ko "Big Block" da "Ƙananan Block".
Yaya aka haifi Small Block kuma menene bambance-bambance?
Kafin bayyanar Small Block V8 na farko, a cikin 1955, tayin V8 na yawancin magina na Amurka ya kasance ta Big Blocks. Ba ma son fadada shi da yawa, amma manyan bambance-bambancen su ne mafi shahara: manyan tubalan sun fi girma a jiki fiye da ƙananan tubalan duka tsayi da faɗi, wanda ba yana nufin suna da ƙarin ƙaura ba, a gaskiya ma yana yiwuwa. don samun ƙaura iri ɗaya tare da tubalan biyu.
Manyan tubalan suna da sandunan haɗin gwiwa mai tsayi, suna fifita bugun bugun pistons, wanda hakan ke haifar da ƙarin juzu'i, amma rashin iya jujjuyawa mai tsayi, kuma kaurin ƙarfe tsakanin bangon Silinda shima ya fi girma. A gefe guda kuma, shugabannin da ke tsakanin waɗannan tubalan suna da gine-gine daban-daban, duka a cikin kusurwoyi na bawul da kuma tashoshi daban-daban na sanyaya da man shafawa. Kamar yadda a cikin tubalan da kansu, a cikin yanayin tashoshi na lubrication, ban da girman girman, tubalan da kansu kuma suna da kusurwoyi daban-daban duka a cikin V-budewa da kuma a cikin kusurwoyi da kuma tazara na masu ƙarfi / na'ura mai aiki da karfin ruwa wanda ke motsa bawul mai tushe. located a kai.
Injiniyoyi na Chevy sun san cewa Big Blocks an keɓe wurinsu don manyan motoci don haka akwai buƙatar ƙirƙirar wani abu mai sauƙi, tare da ƙarfi iri ɗaya, amma yana iya samar da ƙarin ƙarfi a mafi girman revs, don haka an haife shi ƙaramin Block.
A lokacin ne a cikin 1955 aka haifi Chevy's Small Block na farko, mai 265 (yana nufin iyawarsa a cikin inci mai cubic), ƙaramin 4.3 l V8 mai ƙarfi daga 162 hp zuwa 180 hp, tare da gine-ginen turarod da OHV (bawul na sama). Yana da kyau a maye gurbin ƙaura masu kama amma a cikin tubalan silinda na layi guda shida, waɗanda ba su da ƙarancin jijiya na wasanni kuma sun fi mai da hankali kan tattalin arzikin mai.
bi da buge 283 4.6 l, wannan V8 zai kasance da alhakin ƙarfafa jijiyar wasanni ta Chevy, kuma na farko da ya fara harhada tsarin allurar inji na Rochester - wannan tsarin juyin juya hali ya sami 1 hp kowace inci mai siffar sukari.
Almara 327 Juyin halitta ne na sanannen Small Block 265. Wannan 5.3 l V8 zai kafa tarihi a cikin bambance-bambancen L-84, wanda zai zo don samar da Corvette C2 Stingray. Har yanzu juyin halitta na allurar inji ta Rochester, zai jagoranci katangar L-84 zuwa zare kudi 1,146 hp kowace inci mai cubic, rikodin kawai ya karye a 2001 tare da ƙarni na 3 na LS6.
Mun wuce zuwa ga kuma tatsuniyoyi Karamin Block 302 , Wannan 5.0 l V8 zai nuna alamar tsararraki, kamar yadda tushen tsarinsa ya zo kai tsaye daga ƙuntatawa na gasar Trans Am, ta SCCA (Sports Car Club of America), inda ba a yarda da tubalan da ya fi girma fiye da 305 cubic inci ba. A cikin shekarun zinare na wannan gasa, fafatawa tsakanin Camaro Z/28 da Mustang Boss 302 an yi gardamar bi-bi-bi-bi-bi-bi kuma a cikin madaidaitan, 290 hp da mutane da yawa suka yi iƙirarin yana kusa da 350, sun kasance abin farin ciki. Matukin jirgi a cikin 1969 Camaro Z/28.
Matsalar man fetur da ci gaban fasaha a matsayin mafita
A cikin shekarun 70s, rikicin mai da zamanin Smog ( gurɓacewar yanayi da hayakin mota ke haifarwa, wanda ke da hazo mai gurɓata iskar gas), zai iya kashe Chevy's Small Block, amma ba haka lamarin yake ba. An bai wa injiniyoyin Chevrolet aikin Herculean na samun 5.7-lita 350 block, LT1, iya biyan ka'idodin muhalli yayin da suke da ƙarin aunawa. Har yanzu 360 hp ya haskaka. Koyaya, tare da mutuwar Motocin Muscle, tsantsar tsokar Amurka za ta fuskanci duhun shekaru goma na iko, wanda ya kasance a cikin L-82. Wannan Smallan Block 350 ya riga yana da 200 hp kawai, yana mai da Corvette mota tare da fa'ida kaɗan.
Lokaci ya canza kuma aikin injiniya ya samo asali, wannan shine lokacin da Karamin Toshe 350 L-98 . allurar lantarki za ta ba da damar dawo da wasu ayyukan da Corvette da Camaro suka yi asara a lokacin Smog. Ƙarfin bai yi haske ba, tsakanin 15 zuwa 50 hp kawai aka samu, amma ya fi isa ga Corvette don jin kunya ya wuce 240 km/h a 1985.
Tare da Ƙananan Factory Blocks, GM Performance division koyaushe yana ba da mafita don ayyuka daban-daban waɗanda GM Fan ke buƙata. THE ZZ4 , kasancewa na 4th na ƙarni na babban aiki Small Block 350, zai zama yanayin fasaha a cikin 1996 don wannan ƙaura na 5.7 l na Chevrolet.
Babi na gaba: LS
Tsari na Chevrolet na LS-generation Small Blocks ya fara ne a cikin 1997. Wataƙila kun ji labarinsu, ko aikinsu ne, araha, ko kuma sauƙin yin musanyawa idan aka yi la'akari da ƙananan girmansu. Daga alamar 5.7 l LS1/LS6 zuwa giant 7.0 l LS7, tubalan LS sun yi alama har abada tsarar da ke marmarin iko, dogaro da matsakaicin amfani, a farashi mai rahusa fiye da gasar.
Ga masu tsattsauran ra'ayi na tsohuwar ikon makaranta, GM Performance har yanzu yana bayarwa, a cikin ƙarfin silinda na almara na 7.4 l, toshe LSX-R 454. A cikin 1970 tatsuniyar 454 LS6 ta kasance V8 Big Block wanda ke ba da Chevelle SS, tare da ikon 450. hp. A yau yana yiwuwa a cire ta hanyar N/A (wanda ake so) daga LSX-R fiye da 600 hp.
ZZ6, na baya
Mun gama yawon shakatawa ta Chevrolet's Small Blocks tare da sabon injin da ke fitowa daga Ayyukan GM, sabon ZZ6 . Tabbas, al'adar tana ci gaba da wannan 5.7 l V8 Small Block, kuma don bikin waɗannan shekaru 60, wannan ZZ6 ƙari ne ga kasancewa mafi ƙarfi 5.7 l koyaushe - 405 hp da 549 Nm da aka fitar daga tsohuwar ƙirar quad jiki - wannan ikon analog 100% ya dogara ne akan ƙera kawunan LS V8 na musamman. Manufar ita ce ƙara saurin kwararar iska, tare da ƙarin camshaft mai ƙarfi amma mutunta nau'in camshaft na turarod, saitin bawuloli da aka sake yin aiki, ƙirƙira crankshaft da pistons a cikin aluminum tare da babban abun ciki na silicon.
Kodayake ƙarni na LS zai ba da hanya ga LT, ta hanyar injiniya irin wannan ne muke fatan ƙarin shekaru 60 na Small Blocks V8 wanda Chevrolet ya ci nasara da mu. "Tsohuwar Makaranta" ko na zamani, DOGON RAYUWA ZUWA V8.
Chevy Small Block 302