Casting info for Small block Chevy blokker

Casting Info og forklaring

Det er flere ting som identifiserer en casting! Alle har hørt mytene! Liksom: "Hvis peilepinnen er på" X "-siden det er en 350 'eller' Hvis blokken har en liten plugg like over timingen dekslet er det en 350 'eller' ALLE 400-er har tre frostplugger '. Andre inkluderer, 'Alle lastebiler har 4-bolt mains og smidde veiver "og så videre og så fjerde. Den enkle sannheten er at de fleste av dem er bare ikke sanne!
Så før du legger ut dine hardt opptjente penger du bør i det minste vite nøyaktig hva du får. Jeg kan ikke fortelle deg hvor mange "350 s" har blitt brakt til meg for buildups da jeg drev motoverksted, og som viste seg å være 305 eller andre små uønskede motorer som ble kjøpt på en "sweet deal"!



Block info 

Følgende tabeller viser, boring, slag, årstall og annen info for både big og small  block Chevy motorer.



CID ÅR      BORING SLAG OVERFALL
262 75 & 76  3,671    3,10    2-bolt Main
265 55-56     3.750    3.00    2-bolt Main
267 79-81     3.500    3.48    2-bolt Main
283 57-67     3.875    3.00    2-bolt Main
302 67          4,001    3,00    2-bolt Main
302 68-69     4,001    3,00    2 & 4-bolt Main
305 75-date  3,736    3,48    2-bolt Main
307 68-73     3.875    3,25    2-bolt Main
327 62-69     4,001    3,25    2-bolt Main
350 67-date  4,001    3,48    2 & 4-bolt Main
400 70-72     4.125    3,75    2 & 4-bolt Main
400 73-80     4.125    3,75    2-bolt Main


CID ÅR      BORING SLAG OVERFALL
348 58-61    4.125    3,25    2-bolt Main
366 66-date 3.940    3.76    4-bolt Main
396 69-69    4,094    3,76    2 & 4-bolt Main
409 61-65    4,313    3,50    2-bolt Main
402 70-72    4.125    3.76    2 & 4-bolt Main 
427 66 -?     4.250    3.76    2 & 4-bolt Main
454 70-date 4.250    4,00    2 & 4-bolt Main
502 91-date 4.470    4.00    4-bolt Main


Legg merke til at 427-tallet kom i to varianter, Personbil og lastebil blokker. Passasjer blokker har 9,8 "dekk og truck blokkene har 10,2". Truck blokker er blokker i en lastebil som er større enn 1 tonn! 1/2  til 1 tonns lastebiler brukte passasjer blokker.

Lastebil blokkene har alle smidde veiver og HD-råder med 7/16 "rådebolter, og har vanligvis store tunge fire rings stempler og er ikke ønskelig å bruke for høy ytelse (performance applications). Innsugsmanifoilene er også bredere.

Som du kan se er det mange forskjellige typer tilgjengelige blokker, og at 4-bolt mains er bare tilgjengelig på noen få typer motorer. Ikke alle 4-bolt er ønskelig å bruke! 70-72 400 small blokk var tilgjengelig med 4-bolt , men disse var utsatt for sprekkdannelse, når motoren ble kjørt hardt over en tidsperiode. Sprekker vanlighvis fra bærelager feste og ut mot nedre del av sylinderen. Her en 2-bolt blokk mer ønskelig. Hvis du må ha en 4-bolt 400 blokk, kan du bruke en aftermarked med sprikende (Spread) bærelager overfall installert på en god 2-bolt blokk.

Alle GM støpte blokker, det være seg small eller big block, topper eller veiver, innsug eller fordelere har avstøpnings datoer. En bokstav etterfulgt av en rekke tall betegner måned, dag og år delen ble lagd. Bokstavene betegner en måned.


A = januar  G = juli
B = februar H = august
C = Mars      I = september
D = april     J = oktober
E = May      K = november
F = Juni      L = Desember


Det første sett med tall betegner dag og kan være en eller to sifre. Det andre settet betegner år og kan være 1 til 4 sifre.

f.eks
  F18 =         1 juni på 68, 78, 88 eller 98.
  F238 =      23 juni på 68, 78, 88 eller 98.
  F2378 =    23 juni 1978.
  F231978 = 23 juni 1978.

Når du kombinerer støpenummer og produksjonsdato kan du bestemme det sanne år og produksjon av de fleste støpegods. Hvis du hadde en støpedato F238 på en blokk med en avstøpning 3931174, kan det fortelle at denne 307 blokken ble støpt juni 23. 1968, siden denne blokkens «casting» var kun tilgjengelig på 60-tallet og ikke 70-90 årene.

Blokkene har også en tredje ID markør. Suffiks koder. En suffiks kode er stemplet i fronten av motoren ved enden av toppen på passasjersiden like over vannpumpen, noen big blocks har dette nummer rett over midten av register dekslet i en liten flat fordypningen. Denne koden har vanligvis en lang serie med bokstaver og tall. Vanligvis begynner de med en bokstav som betegner hvilken motor-monterings fabrikk de kom fra.

F = Flint S = Saginaw T = Towanda V = Flint H = Hydramatic K = Canada M = Mexico

De blir deretter etterfulgt av monteringsdatoen som er 3 til 4 sifre. Monteringsdatoen er vanligvis stemplet med først, ett eller to sifre for måneden og de neste to for dagen. V0822 = 22. Flint fabrikken i august. De siste, 1-3 siffer er en suffiks-kode. De siste 1-3 siffer er normalt bokstaver, men noen tre-sifrede versjoner kan  inneholde tall. En vanlig suffiks kode ble brukt i flere år og på motorer i flere fabrikater og modellbiler. Suffiks koder er vanligvis den eneste kilden til ID. Også siden disse tallene er stemplet inn i overflaten kan de være forfalsket og / eller endret. Også de fleste performance entusiastene kan ha pyntet litt på dette. F.eks ved toppdekking av blokka. Når de er maskinert på denne måten fjerner det suffiks koden.

Faktakilde Chevymania

Chevy Small Block - Engine Block Casting Numbers

 NB! "High Power" (HP) er den høyeste HP, og "Low Power" er den lavest HP «RPO motor», blokken ble brukt som.

"Main Caps" er antall bolter som holder overfallet. En "to-bolt" main, eller en "fire-bolt" main. Fire bolt main blokker er brukt i motorer med høy yteevne, fordi den ekstra styrken av ytterligere bolter holder den nedre delen av blokka stivere og mindre utsatt for svikt. Men en skikkelig lagd 2 bolt main motor vil fungere helt fint (de fleste ganger vil knekke en rådebolt før du knekker en veiv, selv om det "bare" er en 2 bolt main blokk). 

 Years                   Casting                   CID         LP           HP    Main Caps Comments

1980-85                140029                  350         -             -             2            car

1973-80                330817                  400         150         180         2            car, truck

1975                      355909                 262         110         110         2            car, truck

1976-85                355909                  305         -             -              2            A

1975                      360851                 262         -             -             2            Monza

1976-79                361979                  305         -             -              2            car, truck

1978-86                366245                  350         -             -              -             car

1982-86                366286                  350         -             -              4            Chevrolet, siamese

1982                      366299                 350         -             -              4            Chevrolet, aluminium

1956-67                383810                  283         -             -              2            -

1967-68                389257                  302         -             -              2            Z-28

1968-73                391436                  307         -             -              2            -

1965-67                393288                  283         -             -              2            car, truck

1976-79                460776                  305         -             -              2            car, truck

1976-79                460777                  305         -             -              2            car

1978-79                460778                  305         -             -              2            car, truck

1979-82                471511                  267         -             -              2            car, truck

1976-85                581671                  305         -             -              2            A

1985-94                1489363                350         -             -              2            -

1979-82                2135412                267         -             -              2            -

1979-82                2404929                267         -             -              2

1973-76                3030817                400         -             -              2            car, truck

1958-61                3556519                283         -             -              2            car, truck

1955                      3703524               265         195        _              2            car, no filter

1955-56                3720991                265         195        225           2            car, truck

1957                      3731548               283         220        283          2            -

1956-67                3736935               283         -             -               2            -

1957-59                3737739               283         220        290            2            car, truck

1958-62                3756519               283         170         315           2            car, truck

1956-67                3756935               283         -             -               2            -

1962-65                3782870               327         250         375           2            car, truck

1956-67                3789187               283         -             -               2            -

1962-67                3789817               327         210        275            2            car, truck

1961-62                3789935               283         170         315           2            Late 61 car & vette

1962-67                3790721               283         170         220           2            Chevy II

1964-67                3791362               327         250         300          2            Replaced 3790721

1958-63                3794226               283         170         195          2            Car & truck

1968-69                3794460               327         250        250           2            truck

1968-69                3814660               327         -             -              2            F A

1968-69                3814660               302         -             -              4            Camaro, Z-28

1963                      3830944               327         -              300        2            -

1956-67                3832338               283         -             -              2            -

1964-66                3834810               283         195         220          2            Car, truck & marine

1962-63                3834812               283         170         195          2            car & truck

1958-62                3837739               283         -             -              2            -

1964-68                3849852               283         195         220          2            car & truck

1956-67                3849859               283         -             -              2            -

1956-67                3849935               283         -             -              2            -

1964-67                3858174               327         -             -              2            car, truck

1968-76                3855961               350         -             -              2            car

1964-67                3858174               327         275         350          2            Full, A & Y

1964-67                3858180               327         250         300          2            -

1962-67                3858190               327         -             -              2            -

1965-67                3862194               283         195         220          2            Chevy II

1962-66                3864812               283         230        -               2            car, truck

1964-67                3868657               327         300         -              2

1962-67                3876132               327         -              -             2

1963                      3889935               283         -              -            2            truck

1967                      3892657               302         290         290          2            Z-28, small journal

1967                      3892657               327         210         350          2            car & truck

1967                      3892657               350         295         295          2            Camaro

1968-69                3892659               327         210         -               2

1967                      3896944               283         195         195         2            replaced by 307 in 68

1967                      3896948               283         195         195         2            identical to 3834810

1967                      3903352               327         210         350          2            cars only

1969-80                3911460               350         -              -              2            A

1968-73                3914635               307         -              -              2            car

1968                      3914636               307         200         200          2            car & truck

1968-69                3914638               327         -              -              2

1968-73                3914653               307         -              -              2            A

1968                      3914660               327         210         300         2            cars

1968                      3914678               302         290         290         2/4        Camaro, Z-28

1968                      3914678               327         210         350         2            car & truck

1968                      3914678               350         295         295         2            Camaro/ChevyII

1965-67                3932288               283         -              -              2            A

1956-67                3932338               283         -              -              2

1974-75                3932368               350         -              -              2

1969-73                3932371               307         -              -              2            car,truck

1969-73                3932373               307         -              -              2            car,truck

1969                      3932386               302         290         290         4            Camaro Z28

1969                      3932386               327         210         210         2            Camaro

1969                      3932386               350         300         350         4           

1969                      3932388               302         290         290         4            Z28

1969                      3932388               350         300         300         4            cars

1968-69                3933100               327         -              -              2

1968-69                3933180               327         -              -              2

1968                      3941174               307         -              -             2            truck

1956-67                3949852               283         -              -              2

1970-80                3951509               400         150         265         2/4        car,truck

1970-73                3951511               400         255         265           4            B & G body

1962-67                3953512               327         -              -              2

1968-69                3955618               327         -              -              4            A,F,Vette

1969                      3956618               302         290         290          4            Z28

1969                      3956618               327         235         235          2            fullsize

1969                      3956618               350         250         350         2/4        cars

1969                      3956632               307         200         200          2            car & truck

1969-76                3958618               350         -              -              2            A

1962-63                3959512               327         250         -               2

1956-67                3959532               283         -              -              2

1968                      3970010               327         -              -             2            A

1969-79                3970010               350         185         370         2 or 4    car, truck, Vette

1970-73                3970014               350         200         300         2/4        LA built Camaro

1969-73                3970020               307         115         200          2            car,truck

1969-72                3970024               307         130         200          2            A,F,X

1968-76                6259425               350         -              -              -              car,truck

1980-84                14010201             305         -              -              2            car,truck

1980-84                14010202             305         -              -              2            car,truck

1980-84                14010203             305         -              -              2            car, truck

1980-82                14010205             267         -              -              2            -

1980-85                14010207             350         -              -              4            truck

1980-85                14010209             350         -              -              4            truck

1978-86                14010231             305         -              -              2            -

1979-82                14010280             267         -              -              2            car

1982                      14011064             350        -              -              4            Chevrolet, high tin

1979-82                14016375             267        -              -               2            -

1979-82                14016376             267        -              -               2            car

1978-85                14016379             350        -              -              -             car, truck

1980-84                14016381             305        -              -              2            car, truck

1978-88                14016383             305        -              -              2            -

1979-82                14040205             267        -              -              2            -

1978-86                14049047             305        -              -              2

1986-94                14079287             350        -              -              -

1987                      14088526             350        -              -            2            Camaro

1986-94                14088548             350        -              -              -             -

1986-92                14088551             305        -              -              2            -

1988-94                14093627             305        -              -              2            -

1986-94                14093638             350        -              -              -

1988-94                14094766             305        -              -              2

1986-94                14101148             350        -              -              -

1987-88                14102058             305        -              -              2

1969-85                14316379             350        -              -              2

Casting info for BB Chevy blokker

BBC Engine Block Casting Numbers

  Casting # Year CID Comments
  340220 1972-76 427 tall truck
  345014 1974-86 454 truck
  346236 1974-76 454 215, 2 bolt
  359070 1974-90 454 truck
  361959 1973-85 454 car & truck
  364776 1968-84 427 tall truck
  364779 1968-88 366 tall truck
  473478 1968-84 427 tall truck
  3782870 1968-76 427 tall truck
  3855061 1965-67 396  
  3855961 1966-67 396 325, 360, 2 bolt
  3855962 1965-66 396 360, 375, 425, 4 bolt
  3855977 1965-67 366 tall truck
  3866961 1966-69 396 Chevy, Chevy truck
  3869942 1966-67 427 390, 425, 2&4 bolt
  3873858 1966 396 375, 4 bolt
  3902406 1967 396 325, 350, 375, 2&4 bolt
  3902466 1965-67 396 ??
  3904351 1967 427 385, 390, 400, 425, 430, 435, 2&4 bolt
  3904354 1966-67 366 tall truck
  3916319 1968-85 366 tall truck
  3916321 1968 427 385, 390, 400, 425, 430, 435, 2&4 bolt
  3916323 1968 396 325, 350, 375, 2&4 bolt
  3918319 1966-70 366 Chevy truck, GMC, tall truck
  3925521 1968-85 366 tall truck
  3928319 1969-73 366 GMC, tall truck
  3935439 1968-69 427 335, 390, 400, 425, 430, 435, 2&4 bolt
  3935440 1968-69 396 265, 325, 350, 375, 2&4 bolt
  3937724 1968-85 366 tall truck
  3937726 1968-84 427 tall truck
  3955270 1969 427 335, 390, 400, 425, 430, 435, 2&4 bolt
  3946052 1969 427 430 ZL-1, 4 bolt, aluminum
  3955272 1969 396/402 265, 325, 350, 375, 2&4 bolt
  3955274 1968-85 366 tall truck
  3955276 1968-84 427 tall truck
  3963512 1969-71 427 335, 390, 400, 425 COPO, 430, 435,
      454 345, 360, 365, 390, 425, 450 2&4 bolt
  3963513 1973-76 454 215
  3965440 1968-69 396  
  3965449 1968-72 396  
  3965540 1968 396  
  3969854 1969-72 396/402 240, 265, 300, 325, 330, 350, 375,
      454 360, 2&4 bolt
  3969858 1968-84 427 tall truck
  3999289 1972-78 454 215, 235, 240, 270, 2 bolt, car & truck
  3999290 1972 402 240, 2 bolt
  3999293 1968-85 366 tall truck
  3999294 1968-84 427 tall truck
  6272176 1968-76 366 Chevy, GMC, tall truck
  6272177 1972 402 210
  6272181 1973-76 427 tall truck
  1401544 1975-87 454 truck

 

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