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The P-Springy is available in several different types. The most universal and first developed unit is known as the "M" Series. It was designed to replace competition coil springs that have outer diameters ranging from 1.42" to 1.625" O.D.
Our "S" Series covers sizes less than 1.42" O.D. as measured at the spring pocket base, while the "L" Series handles applications starting at 1.75" O.D. and up.
Valve lift capacity for these springs typically ranges from stock production values all the way up to 1.000" and beyond.
Installation height is almost always very similar to the original coil being replaced. If extended length intake or exhaust valves are current being employed, the P-Springy units will need at least that same length of stem.
Our extensive use of computer assisted design and machining have allowed the P-Springy to be available for virtually any application that requires high speed valve train hardware.
Finally, as an example in a recent test using "M" Series hardware, no valve control issues were noted running common titanium sprint car valve train hardware at 11,000 RPM.
Clearly, dynamic mass reduction wins out in the end, no matter if you're an F1 Team or campaigning a USAC Midget. In the case of a large production V8, why tether to old technology that limits you to 9600 RPM?
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