EA113 Pistons
Set of 4
Overbore and hone required
APR is pleased to present proprietary light-weight,
high-strength forged OEM profile MAHLE
pistons for EA113 2.0T FSI engines.
As the leader in high performance engine products for the
Volkswagen Automotive Group, APR is capable of
creating horsepower and torque levels outside of the original
equipments stress tolerances. In such cases, its recommended and in
some cases necessary to upgrade additional engine components to
cope with the increased load. APRs pistons raise the engines stress
tolerance levels to provide years of continued reliable operation
without compromise.
The introduction of direct injection played a significant role
in piston combustion bowl design. The profile ultimately affects
the swirl and tumble of the air/fuel mixture making the design
critical for the most efficient use of the fuel. APR
worked with MAHLE, a VAG Tier 1 supplier
for OEM pistons, to design a proprietary piston
sharing the OEM profile, as found in VAGs higher
performance 2.0T FSI engines, along with other
strength and weight saving properties.
Quick Facts
- Forged pistons
- Proprietary APR / MAHLE design
- Proprietary MAHLE 142S alloy
- Low noise materials
- Low thermal expansion for tighter tolerances
- OEM piston compression bowl profile
- 83mm oversized design
- 9.8:1 compression ratio
- MAHLE 22mm German tool steel wrist pins
included
- MAHLE low-drag rings included
- 318 grams per piston
- Hard anodized top ring grooves to prevent micro-welding
- MAHLE proprietary Grafal anti-friction coated
skirts
- OEM oil squirter notches
- First landing accumulator grooves for top ring seal
promotion
- Ultra flat ring grooves for ring seal promotion
The piston is designed to handle power levels far beyond the
original components ratings in order to ensure reliability with
years of continued use. Increasing piston strength often comes at
the expense of increased weight, which ultimately reduces engine
efficiency. To generate a balance between strength and weight,
APR pistons are forged from MAHLEs proprietary 142S
alloy and treated with other MAHLE proprietary
coatings. This material is stronger than the common 4032 alloy,
provides quieter operation than 2618 alloy and maintains tighter
piston to cylinder wall clearances thanks to the materials low
expansion rates. The pistons grey phosphate coating acts as a dry
lubricant to protect against galling and micro-welding while MAHLEs
proprietary Grafal skirt coating reduces drag, scuffing, friction,
wear and noise.
APRs engineering teams chose a 9.8:1 compression ratio after
spending several years testing the affects on knock tolerance and
off-boost operation from different ratios. Depending on engine
code, EA113 2.0T are specd with a multitude of
compression ratios from the factory depending on design
requirements. Lower output engines feature a higher compression
ratio while higher output engines feature a 9.8:1 ratio.
APR explored lowering the ratio even further, but were
unable to locate any advantages in doing so. Furthermore, by not
altering the high output engines compression ratio, the
OEM piston profile is maintained.
APR pistons are designed for 83mm bore diameter, a
half millimeter over the OEM units and as such are not
drop in compatible. The larger piston diameter provides in an
increased engine displacement from 1984 cc to 2008 cc. The slight
increase in displacement and reduction in friction provided by the
included high-performance, low-drag rings frees up horsepower. To
remove any imperfections in the cylinder walls and to provide a
new, compatible sealing surface for the upgraded rings, a first
overbore must take place. APR does not recommend drop
in pistons at this level of internal engine modification.
APR pistons include upgraded 22mm German tool steel
wrist pins for ultimate strength and reliability and represents up
to a 2mm increase in diameter on some lower output VAG
2.0T engines.
The pistons are fully compatible with APRs MS100052
connecting rods.
