Page 89 - 2021-22_EngineCatalogAP

HARMONIC BALANCERS
ATI Super Dampers
ATI Dampers consist of an outer shell, inner shell, crankshaft hub, and up to three elastomers. All ATI dampers meet SFI 18.1 specifications.
Ring Outer Crank Total Part No. Application Diameter Style Shell Hub Balance Weight
ATI917080 400 7.074" 3 Steel Steel External 11 lbs.
ATI917200 283-350 7.074" 2 Aluminum Steel Internal 7.50 lbs.
ATI917260 283-350 6.325" 2 Aluminum Steel Internal 5.50 lbs.
ATI917261 283-350, 1.600", Big Block Chevrolet Crank Snout 6.325" 2 Aluminum Steel Internal 5.75 lbs.
ATI917275 C 350 LT-1/LT-4 ,Corvette 6.750" 3 Aluminum Steel Internal 12 lbs.
ATI917320 283-350 6.325" 2 Aluminum Aluminum Internal 4 lbs.
ATI917411 A 283-350, 1.600", Big Block Chevrolet Crank Snout 6.325" 3 Aluminum Steel Internal 6.25 lbs.
ATI917480 283-350 6.325" 3 Aluminum Aluminum Internal 4/75 lbs.
ATI917410 283-350 6.325" 3 Aluminum Steel Internal 6.30 lbs.
ATI917780 283-350 7.074" 3 Steel Steel Internal 11 lbs.
ATI917780K 5.0L/305, 1984-95 7.074" 3 Steel Steel Internal 8.75 lbs.
ATI917783K 5.0L/305, 1984-95, With Big Block Chevrolet Crank Snout 7.074" 3 Steel Steel Internal 8.75 lbs.
ATI917785 283-350 7.074 3 Steel Steel Internal 11 lbs.
ATI917781 283-350 6.325" 3 Steel Steel Internal 8.50 lbs.
ATI917783 A, B 283-350 1.600", Big Block Chevrolet Crank Snout 7.074" 3 Steel Steel Internal 8.75 lbs.
ATI917784 A 283-350 6.325" 3 Steel Steel Internal 8.50 lbs.
ATI917789 283-350 6.325" 3 Steel Steel Internal 8.50 lbs.
ATI918872E D 283-350 7.074" 3 Steel Steel Internal 8.75 lbs.
ATI917220 283-350 7.074" 3 Aluminum Steel Internal 6.25 lbs.
ATI917236 283-350 6.325" 3 Aluminum Aluminum Internal 4 lbs.
LT1/LT4 Engines
ATI917315
LT1 2014, Dry Sump, Corvette
7.480"
3
Aluminum
Steel
Internal
7.30 Lbs.
A Hub is counterbored for a dry sump drive. B Chevrolet 3-bolt front. C Signifies a serpentine-style balancer. D With blower pulley bolt pattern and two 3/16" keyways.
Damper Service Parts
Part No.
Engine
Construction
Hubs
ATI916040
Small Block Chevy
Steel
ATI916040U
Small Block Chevy .005 Undersize
Steel
ATI916043 A
Small Block Chevy
Steel
ATI916951U
Small Block Chevy Crank Hub 2.760 Bolt Circle, 1.246" Crank
Steel
ATI916951
Small Block Chevy, Steel Inner Shell
Steel
ATI916090
Small Block Chevy
Aluminum
A Hub is counterbored for a dry sump drive.
Shell Assemblies (Less Crankshaft Hub)
ATI917010
Chevy Front, 7.074" Dia. 3-Ring with Inner Shell, Internal Balance
Steel
ATI917030
Chevy Front, 7.074" Dia. 3-Ring with Inner Shell, Internal Balance
Aluminum
ATI917070
Chevy Front, 6.325" Dia. 3-Ring with Inner Shell, Internal Balance
Aluminum
Part No.
Description
Elastomer Kit
ATI918980-76
Ring Kit, 6" O.D. 3-Ring 70/60/70 Durometer
Damper Tools
ATI918999
Puller/Installer Kit, Universal, with Case, Also for Pulleys and Steering Wheels
ATI918980-76
2021-22 ENGINE BUILDER CATALOG 87
CHEVROLET SMALL BLOCK