Audi R8 Lamborghini Huracan Gallardo 5.2 FSI Valve Spring Kit APR MS100092

Brand

APR APR
$3,630.00
Special order only
SKU
MS100092
High performance, light-weight, upgraded valve spring system.

APR Valve Springs/Seats/Retainers - Set of 40

The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve float common on many applications. APR's design specifications called for a valve spring, retainer and spring seat combination that doesn't overpower and snap the OEM valves or erode the aluminum spring seat, while still maintaining exceptional valve control. The result is an advanced design that's 28% lighter yet 20% stiffer than the high performance OEM Golf R setup and is proven to eliminate the OEM valve train's weakest link. We call it Performance Without Compromise!

Valve Springs:

Weight reduction, and not necessary stiffness, is absolutely necessary to increasing valve control. The APR Valve Spring utilizes a beehive design that allows for a reduction in mass in not only the spring itself, but also through use of a smaller titanium retainer. The springs feature an ovate wire design that allows for even stress distribution resulting in better control at high RPMs through a resistance of harmful valve float inducing harmonics. The lightweight design also accomplishes accurate valve control without requiring an overly stiff spring which has been proven to snap OEM valves in half. Each valve spring weights 29 grams and represents a 19% weight reduction over the OEM Golf R spring. The result is a highly engineered design that's simply plug and play!

Valve Spring Retainers:

Through the use of a beehive design, APR's Engineers were able to design and supply a valve spring retainer that's smaller than stock to reduce weight as much as possible. In an effort to offer extreme weight savings, at an additional 71% over the OEM Golf R retainers, American 6AL4V titanium was used for its high specific strength weighing in at only 2 grams each. By offering outstanding weight savings, exceptional valve control characteristic are achieved while only requiring a modest 20% increase in stiffness over the OEM Golf R spring.

Valve Spring Seats:

Often an overlooked piece of an upgraded valve train is the valve spring seat. The factory heads are aluminum, and unfortunately increased spring pressure can distort or erode the mating surface overtime as they mate directly to the bare head. To prevent this from happening, APR's Engineers designed valve spring seats out of 4140 heat-treated chrome molly steel with a black oxide coating. The spring seats are strong enough to withstand pressure from the springs and provide a mating surface that evenly distributes spring load across a larger area than the spring it self, allowing an increased spring rate without negative side effects to the aluminum head.

Eliminating Valve Float:

It's not uncommon to experience valve float with the OEM valve springs, even below the OEM rev limit. On some applications like the 2.0 TSI, back pressure from the K04 turbocharger has been known to force the exhaust valves open. This has been noticed on vehicles with overly weak OEM valve springs and some with higher miles that have simply lost their stiffness over time. This issue accompanies misfires commonly above 5000 RPM. In some extreme cases, valves are forced open and the vehicle ceases accelerating any further. A quick datalog of intake mass airflow and boost pressure at wide open throttle will show a sudden rise in boost pressure with an immediate loss of airflow as pressure from the open valves is pushed back into the intake manifold. On other applications, valve float can begin to occur just beyond the OEM rev limit. While other components, such as higher strength valves are often required for extremely high revving applications, the APR Valve Spring System will eliminate float well beyond the revving constraints set forth by the other components.

Features:

  • Increase valve train control
  • Supports higher revving application
  • Weight-saving beehive spring design
  • ASTM A877A OTSC round wire steel springs
  • 6AL4V American titanium retainers
  • 4140 heat-treated chrome molly steel spring seats with black oxide coating
  • 29 grams per spring
  • 2 grams per retainer
  • Compatible with OEM valves
  • Spring seats included to protects against aluminum erosion in the head

 

Quantity 40
Retainer Material 6AL4V Titanium
Retainer Weight (grams) 2
Seat Material 4140 Chrome Molly Steel
Spring Material ASTM A877A OTSC
Spring Style Beehive
Spring Weight (grams) 29
More Information
OEM Part Number MS100092
UPC 810904031013
Brand APR
Condition Brand new
Country of Manufacture United States
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You're reviewing:Audi R8 Lamborghini Huracan Gallardo 5.2 FSI Valve Spring Kit APR MS100092

This Fits:

Make Model Year
AudiR82009
AudiR82010
AudiR82011
AudiR82012
AudiR82014
AudiR82015
AudiR82017
AudiR82018
AudiR82020
AudiR82021
AudiR82022
LamborghiniGallardo2009
LamborghiniGallardo2010
LamborghiniGallardo2011
LamborghiniGallardo2012
LamborghiniGallardo2013
LamborghiniGallardo2014
LamborghiniHuracan2015
LamborghiniHuracan2016
LamborghiniHuracan2017
LamborghiniHuracan2018
LamborghiniHuracan2019
LamborghiniHuracan2020
LamborghiniHuracan2021
LamborghiniHuracan2022
LamborghiniHuracan2023

Note:

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WARNING: This item requires professional installation to protect the warranty.
NOTE: Euro Car Electronics offers Installation Australia wide. Call 07 5479 5555 or find installer.
VALVE SPRING KIT 5.2FSI 5.2L V10