Streetdampr

Designed just for mildly built small block Chevys and Fords Streetdampr harmonic dampers use silicone fluid in a sealed, laser-welded housing to control crankshaft vibration at all engine rpm, just like their race-ready brothers. That means more accurate spark and valve timing and reduced bearing and valvetrain wear. About the only difference between the Streetdampr and Fluidampr is that the Streetdamprs are not SFI-approved for racing.

   FAQ

If you decide to competitively race your Streetdampr equipped car. Be aware, most race sanction organizations require the harmonic balancer to meet SFI 18.1 specifications. While a Streetdampr is manufactured and functions to the same high standards as a Fluidampr, it does not receive official SFI 18.1 testing, marking or certificate necessary to pass race tech inspection. This is done to keep Streetdampr an economical option for non-race restoration projects and street rods.

Chevy Small Block

(Non-SFI)

PART # 670100
Fitment GM / Chevy / Buick / Pontiac small block. 262ci-350ci, 409ci V8. Internal balance. Will not fit LT1 '92-later.
Bore Diameter 1.2455"
Degree Marking Range 40 BTDC to 10 ATDC. Additional timing/degree amrks at 90, 180 and 270
Degree Markings Engraved
Engine Balance Internal
Finish No Finish
Keyway Single; (3/16")
Length 2.335"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-7/8"
Safety Rating Not SFI Approved
Weight / Rotating Weight 10.5 lbs / 7.0 lbs

PART # 790100
Fitment Chevy Small Block. 400ci. External balance. Non-SFI approval.
Bore Diameter 1.2450"
Degree Marking Range 40 degree BTDC to 10 degree ATDC
Degree Markings Engraved
Engine Balance External (26 oz)
Finish No Finish
Keyway Single; (3/16")
Length 2.335"
Material Steel
Mounting Hardware Included No
Outside Diameter 7-3/16"
Safety Rating Not SFI Approved
Weight / Rotating Weight 11.7 lbs / 7.8 lbs

Ford

(Non-SFI)

PART # 620200
Fitment Ford 289, 302, 351, 400ci V8. External balance, 28oz. 4 bolt standard Ford pulley bolt pattern. Pulley space #717656 may be required on some 1975-later engines. Custom pulleys may be required on 1969 & earlier engines.
Bore Diameter 1.3745"
Degree Marking Range 2 degree increments, 50 BTDC to 10 ATDC
Degree Markings Engraved
Engine Balance External (28 oz)
Finish No Finish
Keyway Single; (3/16")
Length 3.500"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-1/4"
Safety Rating Not SFI Approved
Weight / Rotating Weight 10.1 lbs / 6.7 lbs