Big Block Chevy Engine Parts Identification

Transcription

1 Big Block Chevy Engine Parts Identification Engine Blocks Cylinder Heads BBC Cams Crankshafts Pistons Intake Manifolds Exhaust Manifolds Balancer/Flywheel Info BBC Engine Block Casting Numbers Casting # Year CID HP/RPO/Comments/Applications tall truck truck , 2 bolt truck car & truck tall truck tall truck tall truck tall truck , 360, 2 bolt , 375, 425, 4 bolt tall truck Chevy, Chevy truck , 425, 2&4 bolt , 4 bolt , 350, 375, 2&4 bolt , 390, 400, 425, 430, 435, 2&4 bolt tall truck tall truck , 390, 400, 425, 430, 435, 2&4 bolt , 350, 375, 2&4 bolt Chevy truck, GMC, tall truck tall truck GMC, tall truck

2 , 390, 400, 425, 430, 435, 2&4 bolt , 325, 350, 375, 2&4 bolt tall truck tall truck , 390, 400, 425, 430, 435, 2&4 bolt ZL-1, 4 bolt, aluminum / , 325, 350, 375, 2&4 bolt tall truck tall truck , 390, 400, 425 COPO, 430, 435, , 360, 365, 390, 425, 450 2&4 bolt / , 265, 300, 325, 330, 350, 375, , 2&4 bolt tall truck , 235, 240, 270, 2 bolt, car & truck , 2 bolt tall truck tall truck Chevy, GMC, tall truck tall truck truck Big Block Chevy Cylinder Heads Open vs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. Openchamber designs are larger and provide lower compression ratios, so require a much larger piston dome to achieve the same compression as a closed-chamber head.

3 Use of either style head requires that the correct pistons are used, otherwise... BBC Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust Casting Years CID Chamber CC HP/RPO/Comments Closed , 435 L-88/L-89, 1.72 ex L Closed , 435 L-88/L-89, 1.84 ex , L-89, L-88/ZL Open , 465 LS-6/LS-7, round ex Semi Open 72cc, IP 400cc, bowtie, sym port Open 118.0cc, IP 295cc, replacement, C port Open 425, 105.0cc, IP 380cc, bowtie, W port Closed , 425 Z-16/L-37, 1.72 ex L Closed L-72, 1.72 ex L Closed , 435 L-71/L-72, 1.72 ex L-78, 1.72.ex 427 Closed , 435 L-71/L-72, 425 COPO / L-78, Intake Port 325cc , 435 L-71/L Closed 450 LS-6, 108.0cc Closed 450 LS-6, 109.0cc Open 425 LS-6, 118.0cc Closed 425 LS-6, 118.0cc

4 Open Open 425, 118.0cc, IP 325cc Open 425, 118.0cc, IP 325cc, replacement Open GEN V, 118.0cc, IP 325cc, replacement OVAL PORT - Valve size 2.06 intake, 1.72 exhaust Casting Years CID Chamber CC HP/RPO/Comments /427/454 Open /427/454 Open /454 Open Open 113.0cc /427/454 Open /427/454 Open Open car & truck Open 113.0cc Open 113.0cc /454 Open 113.0cc Open Closed cc Closed truck , 360 L-34/L Closed 390, L cc Closed truck , 350 L-34/L Closed 390, 400, L-36/L cc

5 Closed truck , 350 L-34/L Closed 385, 390, 400, L-36/L cc , 350 L-34/L Closed 335, 385, 390, cc /427 Closed truck , 350 L-34/L Closed 335, 385, 390, cc /396 Open 2V/ cc car & truck Open cc truck , 385, 390, Closed 345, 360, 390 LS / , 330, , 385,390, Closed 345, 360, 390 LS cc truck /427 Closed truck /427 Closed truck /427 Closed truck , 330 LS Open 365 LS cc , 300, 330 LS Open 365 LS cc , LS Open 270, LS-5

6 Open truck Open truck Open truck Open truck Open truck Open truck Open truck Open truck BBC Camshaft Part Numbers Part # Year Type Lift lift Solid.560I/.560E.262I/.262E Comments/Specs/RPO's/Apps 121 deg overlap, competition-short track apps Hyd.440I/.440E.210I/.210E production Corvette Solid.520I/.520E.242I/.242E See Note 1 Hyd.460I/.488E.213I/.217E See Note 2 Solid.520I/.520E.242I/.242E See Note 3 Solid.540I/.560E.262I/.269E Solid.540I/.560E.262I/.269E 133 deg overlap, 427 L-88, Reverse rotation 133 deg overlap, 427 L-88, standard rotation Solid.560I/.600E.262I/.273E 135 deg overlap, 427 ZL-1, 454 LS Solid.600I/.600E.286I/.286E See Note Hyd.500I/.500E.222I/.221E 121 deg overlap, marine grind or HP street

7 Hyd.500I/.500E.222I/.221E 121 deg overlap, marine grind or HP street ( ) Note 1: 80 deg overlap, hp L-78/L-89, /435hp L-71/L-72, hp LS-6, HP street Note 2: /350hp L-34/L-35, /390/400hp L-36/L-68, /360/390hp LS-4/LS-5, good torque/hp Note 3: 80 deg overlap, hp L-78/ L-89, /435hp L-71/L-72, hp LS-6, HP street Note 4: 148 deg overlap, maximum power with F.I. or tunnel ram, Can Am BBC Crankshaft Part Numbers Casting # Year CID Comments/Specs/RPO's/Apps truck,1053,forging number with automatic transmission L-88, See Note See Note forged, cross drilled, balanced for 11:1 CR tufftrided, in stroke, 5140, raw forged LS-6, See Note LS-7, See Note raw forged, semi finished, stroke raw forged, semi finished, stroke, L-88/ZL-1, See Note with manual transmission raw forged, 3.75 stroke, LS-6

8 raw forged, 4340, Note 1: L-88, with 3/8 in bolt rods, balanced for 12.5:1 CR, tufftrided, cross drilled Note 2: forged, cross drilled, 3.76 stroke, tufftrided, balanced for 11:1 CR Note 3: 1053, tufftrided, cross drilled, balanced for 9.25:1 or 11.25:1 CR, forging number and 7416 Note 4: 4 in stroke, HD, 5140, LS-7, balanced for 12.5:1 CR, tufftrided, cross drilled Note 5: tufftrided, 5140, with 7/16 in bolt rods, tufftrided, cross drilled, forging number BBC Exhaust Manifold Casting Numbers Cast # Years Side CID Applications LH LH LH 454 police LH LH Corvette RH Corvette RH LH RH , 360, 375 Z LH Z RH LH 427/454 Corvette RH 427/454 Corvette LH 454 Corvette LH , 360, RH 396/ , 385, LH 396/ , 390

9 LH LH LH 396/427 COPO/ , 350, 375, 425, RH , 350, LH 396/ , 325, 335, 345, 390, RH 396/427 COPO/ , 350, 375, 425, LH 454 Corvette RH 402/ LH 402/ LH 454 police BBC Intake Manifold Casting Numbers ALUMINUM RECTANGULAR PORT - Holley 4V Casting Years CID HP/RPO/Config , 425 L L L L x2 L x2 L-68, oval port L-36, oval port, Qjet x2 L-68, ovat port x2 L L L L-78/L copo L-88/ZL L-36, oval port, Qjet, Late x2 L-68, oval port x2 L-71

10 L-36, oval port, Qjet / L-78/L LS-6, lowrise BBC Intake Manifold Casting Numbers IRON OVAL PORT - Rochester Q-jet 4V Casting Years CID HP/RPO/Config , , L , 360 L-34/L , Holley L , 390 L L , 390 L V , 330, 350 LS , 365, LS , 270