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Home > Products > Super Dampers > Supercharger Damper Hubs and Timing Covers
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Supercharger Damper Hubs and Timing Covers
Y-Body, F-Body, & C/K-Body Serpentine Conversion Kits for LS1 & LS2 Engines
 

Supercharger Damper Hubs & Timing Covers

The early small block Chevrolet and the later LT1 and LS1 engines all present problems when supercharging. The original Small Block and the LT1 have a shaft size of 1.245” and a seal diameter of 1.760 leaving the hub wall thickness at .257” or just over 1/4”. Many engine builders put a 1/4’ key in the crankshaft leaving just 1/8” of material between the groove and the seal surface. The result is a failed hub that destroys the damper and the nose of the crank shaft. The later LT1 and LS1 are even worse with just a press fit and no keys; a total disaster when you try to supercharge and drive the blower from the damper. To remedy this situation, ATI now manufactures a variety of Small Block Chevrolet hubs for supercharging.


Big Block 2.331” Seal Diameter
For the serious racer with high boost requirements, ATI offers a small block Chevy crank hub with the big block 2.331 seal diameter increasing the wall to .562; a whopping 220% increase that totally eliminates failure at this point. A new timing cover and seal are required. For small blocks up to 1992.


Applications
Part #
Price
HUB FOR SBC, 6 BOLT, CHRYSLER FRONT (1) 3/16, (1) 1/4 KEYWAY*
916135
$143.01
HUB FOR SBC, 6 BOLT, CHRYSLER FRONT, (2) 3/16 KEYWAYS*
916136
$156.78
HUB FOR SBC, 6 BOLT, CHEVY OEM FRONT, (2) 3/16 KEYWAYS
916172
$155.76
HUB FOR SBC WITH BB SNOUT - CHRYSLER FRONT - 3/16" & 1/4" KEYWAY
916134
$214.69
TIMING COVER FOR SB CHEVY, WITH BB SEAL, CAST ALUMINUM
925500
$149.00
*Room in front of damper for ignition trigger wheel located on hub



1.940” Seal Diameter
For the economy minded racer who is limiting boost using the standard small block crank, ATI offers a 1.245 bore hub with a 1.940 seal diameter and a seal that fits the stock small block timing cover. This increases the wall thickness to .347” - a 35% increase!

Applications
Part #
Price
HUB FOR SBC, 6 BOLT, CHEVY OEM FRONT, (2) 3/16 KEYWAYS
916169
$118.00
HUB FOR SBC, 6 BOLT, CHRYSLER FRONT, (2) 3/16 KEYWAYS
916168
$158.93
SEAL FOR V8 & V6 90°
973134
$16.95



LT1 Engines with 2.25” seal diameter

For the LT1, blower damper hubs have a 2.25" seal diameter and ATI machines the timing cover to accommodate a new seal. This is a must on the LT1 due to the long hub length. All hubs are made from heat treated 4140 material and fit a 3.2" bolt circle. Timing covers are also available.

Applications
Part #
Price
HUB FOR LT1, F BODY, 6 BOLT - SUPERCHARGED
916048B
$207.34
HUB FOR LT1, F BODY, 6 BOLT - BB CHEVY SNOUT
916048C
$165.14
HUB FOR LT1, Y BODY, 6 BOLT - SUPERCHARGED
916096B
$195.68


ATI also offers hubs and timing covers for those racers who have gone totally big block: diameter and seal (re: Sprint Cup). Many damper designs are available from ATI including serpentines with additional grooves for supercharging any engine. Consult an ATI Sales Technician for applications.

Applications
Part #
Price
SEAL - SMALL BLOCK FORD TIMING COVER TO 916566 BLOWER DRIVE DAMPER HUB
973131
$23.00
SEAL - ADAPTER TO INNER RACE - PULLEY ASSY BLOWER F1/F2/F3 INPUT SHAFT
973135
$37.27
SEAL - TIMING COVER - FORD 6.2 RAPTOR - FOR FAT ATI HUB
973138
$21.95
 
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