 1000 Series
The 1000 series of springs is the foundation of the PSI stable. This series launched PSI as a leader in the performance valve spring market. As time and technology have progressed, the 1000 Series springs have become the race tested workhorse for the budget minded racer. With their excellent strength and dynamic stability, these springs are a great value for anyone looking to improve the performance of their valve train.
 1200 Series
Throughout PSI's program of continuous product improvement, the 1200 Series builds on the success of the 1000 Series by employing advanced heat-treating operations. These heat treatments increase the strength of the base materials. This increase in strength results in improvement to the fatigue limit of the wire and better resistance to load loss. These factors together allow the engine builder to push the valve train set-up to the next level.
 1500 Series
This series has all the benefits of the 1200's plus an additional nitriding operation. The nitriding process, which is also done in-house, increases the strength at the surface of the wire and at the same time causes a slight softening of the core material. This trade-off in hardness results in a gain in endurance for the Circle Track and Road Circuit teams who are limited by the onset of fatigue at the wire surface. Since Drag racers are not limited by endurance, the loss of core hardness does not make nitriding suitable for their applications.
Max Life Series Preparation (ML)A proprietary, multi-step surface enhancement process that has been proven to increase spring endurance, Max Life processing is available for any level of PSI spring and is very beneficial for those looking for increased endurance while maintaining their existing set-up. |
