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Fluidampr Ford 289, 302, 351 / 400 CID V8 External balance (w/ 28oz CW) Steel Balanced Damper

SKU: FDR650211

Harmonic Balancers

FDR Dampers - Domestic

Fluidampr Ford 289, 302, 351 / 400 CID V8 External balance (w/ 28oz CW) Steel Balanced Damper

SKU: FDR650211

Harmonic Balancers

FDR Dampers - Domestic

A$1,096.52
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

Protect your engine. Modifications can compromise your stock harmonic balancer. Install a Fluidampr performance damper early for best durability. Superior viscous damper design controls harmful torsional vibration across the entire rpm range. Reduce wear on engine components. Reduce risk of crankshaft failure. Improve timing. Unleash lost torque and horsepower. Precision CNC machined and balanced high-grade steel components. Corrosion resistant black zinc finish with engraved timing marks. No maintenance required. Trusted by leading engine builders worldwide. SFI 18.1 certified. Made in USA.

Product Overview

Fluidampr Engine Dampers are designed to control destructive vibrations which are transfered thru the crankshaft. Each time the air/fuel mixture inside a cylinder is ignited, the combustion that occurs creates a torque spike that is applied to the crankshaft through the piston and rod. This torque spike is so severe that it not only turns the crankshaft, it actually twists the crankshaft ahead of its normal rotation and then the crankshaft rebounds. This twisting action is known as torsional vibration. When these torque spikes and forces get into phase with the natural frequency, critical torsional harmonic vibrations occur and can be seriously destructive to the bearings and the crankshaft. Dampers are designed to control those destructive vibrations. Critical harmonic vibrations occur numerous times in a engine’s operating range. Stock rubber and elastomer-type dampers are frequency sensitive “tuned absorbers”, and work at only one critical frequency. In the case of a stock rubber damper, it is tuned for a factory engine’s critical harmonic vibrations. If you change the mass of pistons, rods, or the crankshaft, you change the natural frequency of the crankshaft assembly; therefore, the stock damper is no longer tuned to the new frequency of vibration, and you may be headed for early failure of expensive engine components. Dampers also create heat while they work, and rubber is a poor dissipator of heat. This heat and the exposure to the elements deteriorates rubber, causing it to crack and change durometer, which then leads to inertia ring slippage, damper failure, uncontrolled torsional vibration, and costly engine parts breakage.


Features and Benefits

  • Broad RPM range protection.
  • Reduce risk of crankshaft failure.
  • Reduce wear on critical engine parts.
  • Unleash lost torque & horsepower.
  • No maintenance required.
  • Superior durability.
  • SFI 18.1 spec. Race proven for over 35 years.
  • Made in USA.

Product Details

Year Make
Bolt And Washer Included:No
Bore Dia. Min/Max:1.374 / 1.375
Degree Marking Range:2 degree increments, 50 BTDC to 10 ATDC
Degree Markings:Engraved
Depth:3.5
Description:Fluidampr Harmonic Balancer
Engine Balance:External (28 oz)
Finish:Black Zinc
Grade Type:Performance
Inside Diameter:1.3745
Keyway Spec:Single; (3/16")
Keyway Type:Yes
Keyway:Single
Length:3.34
Material:Steel
Mounting Hardware Incl.:No
Mounting Hole Diameter:1.3745
Mounting Hole Quantity:1
O.D.:6-5/8" (6.625)
Outside Diameter:6.625
Part Number:fdr650211
Prop 65 (C, R, or CR):CR
Prop 65 - Short Label:WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
Prop 65 Yes/No:Yes
Pulley Bolt Pattern:4 bolt standard Ford pulley pattern. Pulley spacer (Fluidampr #717656) may be required on some 1975-later engines. Custom pulleys may be required on some 1969-earlier engines.
Safety Rating:SFI 18.1
Title:Fluidampr - 650211 - Harmonic Balancer - Fluidampr - SBF - Ext Balance 28oz - Each
WT. in lbs.()=Rotating weight:12.5 (8.3 Rwt)
Weight / Rotating Weight:12.6 lbs / 8.4 lbs

Application Summary

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 and earlier engines.

Part Type

Engine Harmonic Balancer

Data: v4.2 - Upd: 2026-09-29 00:44:11

Features

  • Broad RPM range protection.
  • Made in USA.
  • No maintenance required.
  • Reduce risk of crankshaft failure.
  • Reduce wear on critical engine parts.
  • SFI 18.1 spec. Race proven for over 35 years.
  • Superior durability.
  • Unleash lost torque & horsepower.

Specifications

Product Attributes - Brand
Fluidampr
Product Attributes - Manufacturer's Part Number
650211
Product Attributes - Part Type
Harmonic Balancers
Product Attributes - Product Line
Fluidampr Harmonic Dampers
Product Attributes - UPC
815293001111
Product Attributes - Engine Balance
External, 28 oz. imbalance
Product Attributes - SFI Rating
SFI 18.1
Product Attributes - Degree Markings
Yes
Product Attributes - Degree Marking Range
50 BTDC to 10 ATDC
Product Attributes - Outside Diameter (in.)
6.625
Product Attributes - Crankshaft Pulley Bolt Hole Quantity
Four
Product Attributes - Keyway Quantity
One
Product Attributes - Harmonic Balancer Material
Steel
Product Attributes - Harmonic Balancer Construction
Fluid
Product Attributes - Harmonic Balancer Color
Black zinc chromate
Product Attributes - Mounting Hardware Included
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Additional timing/degree marks at 90, 180, and 270 degrees. Pulley spacers may be required for 1975 and later engines. 1.375 inch bore. Accepts 4 bolt crank shaft pulley.

Reference Information

Brand Name/s Fluidampr
StreetFX SKU fdr650211
SFX Item ID 4403659
Supplier Item Code 4403659
Manufacturer SKU 650211
Manufacturer UPC 815293001111
Alternative References FLU000048, FLU650211, 28oz

Compatibility

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 and earlier engines.

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