CRANKSHAFTS
Forged Steel Crankshafts - Cont. Eagle - Cont. “ESP” features SAE 4340 steel non-twist forging, multi-stage heat-treat-
ed, stress-relieved, .125” radii for use with narrowed bearings, chamfered oil holes, shot-peened, nitride hardened, X-rayed, magnafluxed, and sonic tested. Recommended for use up to 1500 HP. Lightweight has the same features as standard, with gun-drilled mains and lightweight counterweight design. Featherweight has same features as standard, with gun-drilled mains and ultra-lightweight counterweight design. Armor Finish (AF) - Surface finishing process that results in an incredibly slick surface. Resembles a chrome finish.
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke 3.875" 3.875" 4.000" 4.000" 4.125"
Main
Balance
EAG435338756000 EAG440038756000 EAG435040006000 EAG440040006000 EAG440041256000
Standard Weight Standard Weight Standard Weight Standard Weight Standard Weight
6.000" 2.100" 350 6.000" 2.100" 400 6.000" 2.100" 350 6.000" 2.100" 400 6.000" 2.100" 400
1-Pc. 2-Pc. 2-Pc. 2-Pc. 2-Pc.
Int. Int. Int. Int. Int.
1855 1900 1855 1900 1875
52 57 52 57 57
ZZ4 Replacement Forged Steel Crankshaft
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke 3.480"
Main
Balance
GMP12670965
SBC ZZ4 Repl. Forged Steel
5.700" 2.100" 350
1-Pc.
Int.
N/A
N/A
Howards Track Smart 3 features 4340 steel non-twist forgings, rough-machined process, double stress-relieved, properly placed profiled counterweights for piston clearance, nitride hardened, lightened holes in throws, large .125” radii for use with cham- fered bearings, precision CNC-machined, micro polished. For 750+ horsepower applications.
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke 3.750" 3.750" 3.875" 4.000"
Main
Balance
HRCH353756012T HRCH403756012T HRCH353876012T HRCH354006012T
Track Smart 3 Track Smart 3 Track Smart 3 Track Smart 3
6.000" 2.100" 350 6.000" 2.100" 400 6.000" 2.100" 350 6.000" 2.100" 350
2-Pc. 2-Pc. 2-Pc. 2-Pc.
Int. Int. Int. Int.
N/A N/A N/A N/A
N/A N/A N/A N/A
K1 Technologies Features: Premium 4340 steel, core nitride hardened, stress-relieved, gun-drilled rod and mains, properly placed counter- weights, large fillet.
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs. 51-54
Part No.
Description Lightweight Lightweight
Stroke 3.480" 3.750"
Main
Balance
K1T012DAD348 K1T012DAD375
5.700" 2.100" 350 5.700" 2.100" 350
2-Pc. 2-Pc.
Int. Int.
1900 1900
55
Lunati Signature Series features premium 4340 non-twist forged steel, heat-treated, stress-relieved, properly placed profiled coun- terweights, nitride hardened, lightening holes in throws, gun-drilled mains, .125” radii for use with narrowed bearings, mag- nafluxed, precision ground, and micro-polished.
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke 4.000"
Main
Balance
LNT60240001
Signature Series
6.000" 2.100" 400
2-Pc.
Int.
N/A
N/A
Manley Features 4340 steel non-twist forging, heat-treated, precision ground, stress relieved, shot peened, nitride hardened, large fillet radii for use with narrowed bearings, gun-drilled rod journals, chamfered oil holes, magnafluxed, and micro-polished.
Min. Rod Length Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs. 44-46 48-50 49-51 49-51
Part No.
Description Lightweight IMCA Legal Lightweight Lightweight
Stroke 3.480" 3.480" 3.750" 4.000"
Main
Balance
MAN190190 MAN190310 † MAN190150 MAN190130
5.700" 2.100" 350 5.700" 2.100" 350 5.700" 2.100" 350 6.000" 2.100" 350
2-Pc. 2-Pc. 2-Pc. 2-Pc.
Int. Int. Int. Int.
1750 1800 1800 1800
† The two center rod journals are not gun drilled. Rule legal in IMCA Hobby Stock and Sport Modified.
31
2021-22 ENGINE BUILDER CATALOG
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