Page 478 - 2021-22_EngineCatalogAP

MAIN BEARING CAPS
Billet Speedworks
Billet Main Bearing Caps
Billet main caps offer increased bottom end strength. Many of the billet caps listed are for converting a two-bolt main block to the more durable four-bolt main configuration.
Pontiac V8
Part No.
PGEP400C PGEP400C4A PGEP400F PGEP455C
Description
4-Bolt Center Main Caps, 389-421 Blocks 4-Bolt Splayed Center Main Caps, 389-421 Blocks 2-Bolt Front Main Cap, 389-400 Blocks 4-Bolt Center Main Caps, 455 Blocks
EAG104554210
PONTIAC V8 326-455
CRANKSHAFTS
Pontiac 400-455
Eagle 428/455 4340 Forged Steel Crankshaft
Crankshaft is a SAE 4340 steel non-twist forging, multi-stage heat treated, stress-relieved, .125" radii for use with narrowed bearings, chamfered oil holes, cross-drilled oiling, shot-peened, nitride-hardened, X-rayed, magnafluxed, and sonic tested. Recommended for use up to 1500 HP.
Min. Rod Rod Part No. Description Stroke Length Pin
EAG445542506700 455 4.250" 6.700" 2.200"
Eagle “ESP” Cast Steel Crankshafts
Main
3.250"
Rear Main Seal 2-Pc.
Balance
Ext.
Target Bobweight Grams 2280
Approx. Wt./Lbs. 75
Features .092" radius on rod and main journals, rear seal and snout, compatibility with standard OEM-style bearings.
Part No.
EAG104554210 EAG104004250
EAG104554250
Description
455, Standard Weight 400, Standard Weight, With Big Block Chevy Journal 455, Standard Weight, With Big Block Chevy Journal
Min. Rod Stroke Length 4.210" 6.625"
4.250" 6.700" 4.250" 6.800"
Rod Pin Main
2.249" 3.250" 2.200" 3.000"
2.200" 3.250"
Rear Main Seal 2-Pc.
2-Pc. 2-Pc.
Target Approx. Balance Bobweight Grams Wt./Lbs.
Int. 2280 73-76 Int. 2280 73-76
Int. 2280 73-76
Eagle Cast Steel Crankshafts
“ESP” features SAE 4340 steel non-twist forging, multi-stage heat-treated, stress-relieved, .125" radii for use with narrowed bearings, chamfered oil holes, cross-drilled oiling, shot-peened, nitride-hardened, X-rayed, magnafluxed, and sonic tested. Recommended for use up to 1500 HP. 3.00" = 400 Mains, 3.250" = 455 Mains.
Part No. Description Stroke
EAG104013750 326-400 3.750" EAG440042106625 400, Standard Weight 4.210"
EAG440042506700 455, Standard Weight, 4.250" With Big Block Chevy Journal
Scat 4340 Steel Crankshaft
Min. Rod Length 6.625" 6.625"
6.700"
Rod Pin Main
2.250" 3.000" 2.249" 3.000"
2.200" 3.250"
Rear Target Approx. Main Seal Balance Bobweight Grams Wt./Lbs.
2-Pc. Ext. — — 2-Pc. Int. 2280 76
2-Pc. Int. 2280 76
Pro Series features 4340 forged steel, heat-treated, nitride-hardened, large fillet radii on all journals, lightening holes in all rod journals, straight shot and chamfered oil holes, precision ground and micro-polished. 3.250" = 455 Mains
Min. Rod Part No. Description Stroke Length
SCA4-400P-4250-6700-2200 455, Standard Weight, 4.250" 6.700" With Big Block Chevy Journal
Rod Pin
2.200"
Main
Rear Main Seal
Balance
Target Bobweight Grams
Approx. Wt./Lbs.
476 2021-22 ENGINE BUILDER CATALOG
3.250"
2-Pc.
Int.
2280
76