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928 Motorsports® 32V Custom Beehive Valve Springs


this part is Pikes Peak tested

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


Item

Retainer

Price (USD)

Shipping*

Availability

32v High-Rev Beehive Valve Spring Set

$28.00

Typically Ships in 2 weeks or less

32v High-Boost Beehive Valve Spring Set

$28.00

Typically Ships in 2 weeks or less

* Domestic US shipping shown. International shipping will be calculated based on location.

 
   
       

Phone: (920) 485-0928
Email: info@928motorsports.com

928 Motorsports, LLC - All Rights Reserved
Horicon, Wisconsin USA

928Motorsports.com - Performance Parts for your Porsche® 928