|
|
 |
Supercharger
Damper Hubs and Timing Covers |
|
|
|
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.
| Application |
Part # |
Price |
| HUB FOR SBC, 6 BOLT,
CHRYSLER FRONT (1) 3/16, (1) 1/4 KEYWAY* |
916135 |
$151.27 |
| HUB FOR SBC, 6 BOLT, CHRYSLER
FRONT, (2) 3/16 KEYWAYS* |
916136 |
$151.27 |
| HUB FOR SBC, 6 BOLT, CHEVY OEM
FRONT, (2) 3/16 KEYWAYS |
916172 |
$119.74 |
| HUB FOR SBC WITH BB SNOUT - CHRYSLER
FRONT - 3/16" & 1/4" KEYWAY - INCLUDES 951502 CRANK BOLT |
916134 |
$197.87 |
*Room in front of damper for
ignition trigger wheel located on hub
| Application |
Part # |
Price |
Purchase |
| TIMING COVER FOR SBC CHEVY, WITH
BBC SEAL, BILLET ALUMINUM |
|
$359.00 |
|
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!
| Application |
Part # |
Price |
| HUB FOR SBC, 6 BOLT, CHEVY OEM FRONT, (2) 3/16 KEYWAYS |
916169 |
$148.82 |
| HUB FOR SBC, 6 BOLT, CHRYSLER FRONT, (2) 3/16 KEYWAYS |
916168 |
$149.65 |
| SEAL FOR V8 & V6 90° |
973134 |
$23.99 |
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.
| Application |
Part # |
Price |
| SEAL - SMALL BLOCK FORD TIMING COVER TO 916566 BLOWER DRIVE DAMPER HUB |
973131
|
$31.50 |
| SEAL - TIMING COVER - FORD 6.2 RAPTOR - FOR FAT ATI HUB |
973138 |
$21.95 |
|
