928 Motorsports® - 928 Motorsports® 32V Custom Beehive Valve Springs

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928 Motorsports® 32V Custom Beehive Valve Springs

Application: 1985-95 32-Valve Porsche® 928

These beehive springs are wound from super clean ovate valve spring wire and are both heat treated and shot-peened. The ovate wire allows for more travel to coil bind and is also thicker on the x axis of the spring giving it greater strength and fatigue resistance.

The design of a beehive spring combines the light weight of a single spring with better harmonic control than a dual spring. Since the beehive changes diameters from the top of the spring to the bottom, the natural frequencies also change with the diameters so the spring is not affected by harmonics like a single spring. The interference-fit center coil meant to dampen the harmonics on dual springs is also eliminated, as is all the heat and valve train stresses it created.

In addition, a beehive has a very small top coil, making the spring retainer much smaller and lighter for less moving mass than a straight wound spring. Consider that the intake valve opens and closes 50 times a second at 6,000 rpm, and you can appreciate how much a reduction in valve train mass can be!

The result is less heat, load and stress on the entire valve train, plus greater fatigue resistance and durability. Race tested, but a significant valve train improvement for non-race engines as well.

Sold only in sets of 32 springs.

Kit Includes:

16 custom exhaust spring perches
16 custom intake spring perches
32 custom 928MS beehive valve springs
32 custom chrome-moly valve spring retainers

Two Sets Available: Chose the High-Rev spring set for naturally-aspirated motors planning to spin up to 8000 rpm. The High-Boost spring set is the right choice for supercharged engines running big boost - up to 20 psi.

	Intake Closed Seat Pressure	Pressure @ Intake Open	Exhaust Closed Seat Pressure	Pressure @ Exhaust Open	Will Bind At
Stock 32v 928 Spring Set	85 lbs	195 lbs @ .354" lift OEM 928 S4 Cam	78 lbs	180 Lbs @ .313" lift OEM 928 S4 Cam	.410" lift
High Rev Beehive Spring Set	100 lbs	240 lbs @ .430" lift 928MS 32vR3 Cam	100 lbs	227 lbs @ .398" lift 928MS 32vR3 Cam	.516" lift
High Boost Beehive Spring Set	115 lbs	248 lbs @ .412" lift 928MS 32vR4 Cam	115 lbs	247 lbs @ .398" lift 928MS 32vR4 Cam	.516" lift