Product Description
Ferrea Racing Valve Springs and Retainers for your EVO 8 or 9!
Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear.
Ferrea valve springs are developed from high strength alloys, including premium grade chrome silicone steel These springs are manufactured with state-of-the-art equipment. Ferrea springs are heat-treated and stress-relieved, which dramatically increases the spring's life. Strict quality control procedures and cycle testing ensures consistency from batch to batch. Ferrea valve springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today's aggressive valvetrain combinations.
BEEHIVE" DUAL SPRING KIT SPECS
PAC Alloy Beehive Valve Springs are developed from premium grade super-clean PAC Alloy material designed for racing applications. These valve springs are crafted using the latest technology in manufacturing and processing techniques through the use of state-of-the-art equipment unmatched throughout the industry. Our springs are progressively coiled with tighter tolerances, heat treated, stress relieved, and multistage shot peen for extended life and durability. Strict quality control procedures and cycle testing ensures consistency from batch-to-batch.
- Spring O.D.: 23.87mm / 28.07mm
- Spring I.D.: 14.73mm / 18.85
- Seat Pressure: 90 lbs. @38mm
- Open Pressure: 225 lbs. @28mm
- Rate Inch: 342 lbs
- Coil Bind: 23mm
- Max Net Lift: 135mm
- Spring Material: PAC Alloy
HIGH PRESSURE" DUAL SPRING KIT SPECS:
- Spring O.D.: 23.1mm
- Spring I.D.: 17.35mm
- Seat Pressure: 90 lbs.
- Open Pressure: 210 lbs.
- Rate Inch: 305 lbs.
- Coil Bind: 21mm
- Max Net Lift: 15mm
- Spring Material: Chrome Silicone
DUAL SPRING KIT SPECS:
- Spring O.D.: 22.75mm
- Spring I.D.: 17.1mm
- Seat Pressure: 80 lbs.
- Open Pressure: 180 lbs.
- Rate Inch: 254 lbs.
- Coil Bind: 20mm
- Max Net Lift: 13.5mm
- Spring Material: Special Alloy
