ATI - Super Dampers® for Chevy Engines

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Super Damper® Harmonic Dampers

Chevrolet Super Dampers

The patented ATI Super Damper is the only damper designed exclusively for high performance engines.

Eliminates torsional crankshaft vibrations

Exceeds SFI 18.1 specs

Laser engraved 360° timing marks

Black zinc chromate finished

Inner and outer shells are available in aluminum or steel contain the steel inertia weight. The inertia weight has six (2-ring design) or eight (3-ring design) computer machined grooves to retain the proper durometer O-rings (dyno tested for each application).

LS1 Crank Pin Drill Fixture Kit
Damper Accessories
Download Damper Installation Instructions
How to read the Damper charts

		STEEL SHELLS			ALUMINUM SHELLS						CRANKSHAFT HUB PART NUMBERS
		8.074" OD	7.074" OD	6.325" OD	7.074" OD				6.325" OD		CRANKSHAFT HUB PART NUMBERS
		3 RING			3 RING		2 RING		3 RING	2 RING	STEEL	ALUM	STEEL WITH INNER SHELL
TOTAL WEIGHT INERTIA WEIGHT		11.00 lbs 7.70 lbs	8.75 lbs 4.50 lbs	6.00 lbs 2.40 lbs	6.25 lbs 4.50 lbs	5.45 lbs 3.70 lbs	5.00 lbs 3.40 lbs	3.75 lbs 2.20 lbs	3.90 lbs 2.40 lbs	3.30 lbs 1.97 lbs	STEEL	ALUM	STEEL WITH INNER SHELL
DAMPER ONLY LESS CRANKSHAFT HUB PART NUMBERS
CHEVROLET FRONT [1]		917007	917010	918940	917030	918850	917020	917000	917070	917050	AVG. WEIGHT 2.4 lbs	AVG. WEIGHT .85 lbs	—
6 BOLT CHEVROLET FRONT [1]			917026
CHEVROLET FRONT FOR HUB WITH INNER SHELL [2]			917009
CHEVROLET FRONT FOR HUB WITH INNER SHELL [2]			917011	918942
CHRYSLER FRONT BLOWER DRIVE 3/8" PULLEY BOLTS [1]			918442E	918447E	918440E	918445E	917040E	917041E	918443E
INTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS
SB V8 1.245" CRANKSHAFT	STANDARD FRONT NO COUNTER BORE		917785	917782	917220	917221	917200	917240	917410	917260	916040
					917230	917231	917210	917250	917480	917320		916090
				917781									916951
			917780										916951 [11]
	USE WITH DRY SUMP [4] COUNTER BORE ACCEPTS DRIVE MANDREL		917786	917787	917202	917204	917206	917208	917412	917262	916044
					917203	917205	917207	917209	917481	917482		916091
			917788	917789									916952
	USE WITH JESEL BELT DRIVE [5]				917232	917233	917234	917235	917236	917237		916092
	USE W/ HILBOURNE FUEL INJ. [3]		917251	917252	917253	917254	917255	917256	917257	917258	916540
	BLOWER DRIVE 2 X 3/16" KEYWAYS [6]		918872E		918610E	918611E	918613E	918612E	918609E		916133
LS1 SB V8 1.483" CRANK	USE WITH DRY SUMP [4] COUNTER BORE TO ACCEPT DRIVE MANDREL		917777	917776	917211	917212	917213	917214	917215	917216	916045
LS1 SB V8 1.483" CRANK					917321	917322	917323	917324	917325	917326		916099
SB V8 1.600" CRANK			917783	917784	917222	917223	917201	917241	917411	917261	916043
					917224	917225	917226	917227	917228	917229		916093
	BLOWER DRIVE		918873E		918614E	918615E	918617E	918616E	918618E		916134
V8 BIG BLOCK	STANDARD OEM FRONT	917062											916890 [9]
			917060										916890 [9]
			917065	917061	917300	917301	917280		918700		916010
					917310	917311	917290		917720			916080
	6 BOLT CHEVY FRONT		917064										916891
	BLOWER DRIVE		918871E		918870E	918880E	918882E				916143
	BLOWER DRIVE W/ JESEL BELT DRIVE HUB HAS INTEGRAL 8MM TIMING BELT PULLEY FOR FUEL PUMP DRIVE		918874E		918875E	918876E					916144
V6 60º	STD OEM FRONT		917130	917131	917140	917141	917090	917240	917190	917180	916170	916180
EXTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS											HUB	HUB & INNER SHELL & WEIGHT	HUB & INNER SHELL
V8 SB 400			917080									916071-2	916070-2
V8 BB 454-502 MARK IV & GEN 5	STD OEM FRONT		917740									916122-2 [10]	916120-2
	BLOWER DRIVE		917741E								916143
	BLOWER DRIVE W/ JESEL BELT DRIVE HUB HAS INTEGRAL 8MM HTD TIMING BELT PULLEY FOR FUEL PUMP DRIVE		917742E								916144

[1] These dampers are assembled units with inner shell.
[2] These dampers are outer shell, inertia weight and o-rings. The inner shell is integral with the crank hub.
[3] Hub is 1” longer than standard.
[4] Hubs for these assemblies have a 2.280 counterbore. A standard length crank bolt is used and the mandrel bolts to the 3 pulley mounting holes. This eliminates the 4” - 6” long bolt that is ineffective in retaining torque. These damper assemblies are used 100% by NASCAR Cup, Busch Grand National and most endurance engine builders. Adapter part # 916321 is available for existing mandrels with 1.245” pilot.
[5] Aluminum hubs for these assemblies have a 2.250 seal diameter with a .500 wall thickness and fits inside the Jessel lower pulley. This eliminates hub failure at the keyway on engines driving dry sump pumps and pulleys.
[6] Hub part # 916131A and #916131B have 8mm, 24 tooth HTD belt drives
[7] Use hub part # 916172 for 1.245” crankshaft with BB seal and Chevy bolting.
[8] Use hub part # 916136 for 1.245” crankshaft with BB seal and Chrysler bolting.
[9] Use hub part # 916890K for 1/4” keyway, 180º from standard.
[10] Use hub part # 916122-2K for 1/4” keyway 180º from standard.
[11] Use hub part # 916951K for 3/16” keyway at 180º from standard.

How to read this chart

Locate the correct manufacturer's chart
Choose the specific engine application listed down the left side of the chart
Determine if the damper needs to be internally or externally balanced ( external balance dampers are constructed of steel only). Black bars that extend horizontally across the entire chart designate these sections
Determine if you need steel or aluminum shells. Labels for this information are listed across the top of the chart in columns 2 and 3.
Once you have determined the shell material, you need to find the outside diameter (OD) of the desired steel or aluminum shell. Then choose between 2 or 3 rings and the desired weight of the damper.
From the far right section of the chart, select either a steel or aluminum hub for your desired engine application. To determine the correct damper assembly part number that intersects is the correct damper assembly.
Assembly part numbers that are color coded correspond to the pulley mount bolt pattern listed near the top of the charts.