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 Shell
Outer Hub Steel
Crank Balance
Total Weight 11 lbs.
Part No.
Application
Diameter 7.074" 7.074" 6.325" 6.325" 6.750" 6.325" 6.325" 6.325" 6.325" 7.074" 7.074" 7.074"
Style
ATI917080 ATI917200 ATI917260 ATI917261 ATI917275 C ATI917320 ATI917411 A ATI917480 ATI917410 ATI917780 ATI917780K ATI917783K ATI917785 ATI917781 ATI917783 A, B ATI917784 A
400
3 2 2 2 3 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3
Steel
External Internal Internal Internal Internal
283-350 283-350
Aluminum Steel Aluminum Steel Aluminum Steel Aluminum Steel
7.50 lbs. 5.50 lbs. 5.75 lbs.
283-350, 1.600", Big Block Chevrolet Crank Snout
350 LT-1/LT-4 ,Corvette
12 lbs.
283-350
Aluminum Aluminum Internal
4 lbs.
283-350, 1.600", Big Block Chevrolet Crank Snout
Aluminum Steel
Internal
6.25 lbs. 4/75 lbs. 6.30 lbs.
283-350 283-350 283-350
Aluminum Aluminum Internal
Aluminum Steel
Internal Internal Internal Internal Internal Internal Internal Internal Internal Internal Internal
Steel Steel Steel Steel Steel Steel Steel Steel Steel
Steel Steel Steel Steel Steel Steel Steel Steel Steel
11 lbs.
5.0L/305, 1984-95
8.75 lbs. 8.75 lbs.
5.0L/305, 1984-95, With Big Block Chevrolet Crank Snout
283-350 283-350
7.074
11 lbs.
6.325" 7.074" 6.325" 6.325" 7.074" 7.074" 6.325"
8.50 lbs. 8.75 lbs. 8.50 lbs. 8.50 lbs. 8.75 lbs. 6.25 lbs.
283-350 1.600", Big Block Chevrolet Crank Snout
283-350 283-350 283-350 283-350 283-350
ATI917789
ATI918872E D
ATI917220 ATI917236
Aluminum Steel
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 ATI916040U ATI916043 A ATI916951U ATI916951 ATI916090
Small Block Chevy
Steel Steel Steel Steel Steel
Small Block Chevy .005 Undersize
Small Block Chevy
Small Block Chevy Crank Hub 2.760 Bolt Circle, 1.246" Crank
Small Block Chevy, Steel Inner Shell
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 Chevy Front, 7.074" Dia. 3-Ring with Inner Shell, Internal Balance Chevy Front, 6.325" Dia. 3-Ring with Inner Shell, Internal Balance
Steel
ATI917030 ATI917070
Aluminum Aluminum
Part No.
Description
Elastomer Kit ATI918980-76 Damper Tools ATI918999
Ring Kit, 6" O.D. 3-Ring 70/60/70 Durometer
Puller/Installer Kit, Universal, with Case, Also for Pulleys and Steering Wheels
ATI918980-76
87
2021-22 ENGINE BUILDER CATALOG
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