Relaxed Length: 1.60"
Compressed Length: .275"
Outside Diameter: .540"
Inside Diameter: .470"
Wire Diameter: .039"
This spring is recommended with Quadrajet accelerator pumps such as Item #1003, #1003A, #1003B, #1003D, #1003G, #1004.
Duration spring is located on accelerator pump assembly between the pump cup and the retainer. The duration spring is used as a safety valve that compresses when the throttle is opened quickly.
Gasoline is not compressible, without the compression spring the accelerator pump linkage would bend and distort under the stress.
This spring is shorter, for a longer spring try Item # 1041