Description
This valve spring is manufactured in Germany from ASTM A877 chromium-silicon alloy steel valve spring wire. The inner and outer spring arrangement creates a valve spring that provides higher forces within a tightly-packaged space. The advantage of a twin spring is that the stiffness of the combined spring varies with length and, because each spring will have a different natural frequency, this helps to avoid surge (you can read more about valve spring technology in our blog post).
These valve springs are suitable for the Cosworth BD-series engines.
Arrangement: Twin coil non-interference-type valve spring
Dimensions:
Inner Spring
- Spring Rate = 20.10 N/mm
- Free Length = 33.70 mm
- Solid Length = 16.50 mm
- Outer Diameter = 22.60 mm
- Inner Diameter = 17.00 mm
- Wire Diameter = 2.80 mm
- No of Coils = 5.90
- Winding = Left Hand
Outer Spring
- Spring Rate = 44.04 N/mm
- Free Length = 36.60 mm
- Solid Length = 20.09 mm
- Outer Diameter = 32.00 mm
- Inner Diameter = 23.80 mm
- Wire Diameter = 4.10 mm
- No of Coils = 4.90
- Winding = Right Hand
