PISTON DESIGNBILLETA billet is made from a bare aluminum cylinder(extruded bar stock) and is the same material as theforgings. This approach gives us the ability to create
any geometry desired and is often used when a forging is not available for a given application, or they canbe chosen for prototyping before a new forging design is released. Although wehave many forgings, sometimes preference is still a billet, as it is a free-form
process ensuring a perfectly matched result every time. We offer several different finishes on our billets and the price is determined accordingly. Depending on
what tools can be used, how many edge breaks/rounded corners are preferred
and tool step over on the program – all determine spindle time. We are also able
to place the center of gravity in “X” and “Y” at the center point of the piston
when feasible and create a balanced piston for tighter piston to cylinder headclearances. Shot peening is always an option on a billet and when done, it
makes the fully machined underside appear very similar to a piston on a forging.

OIL SHED COATING
Applied to the underside of the piston, this coating reduces the reciprocating
mass by repelling oil from internal moving parts.

WPC TREATMENTWPC is a treatment that enhances the surface to reduce
friction by firing ultra fine particles towards the surface of apiston or wristpin at very high speeds. The thermal discharge
permanently changes the surface, strengthening the structure
and creating a harder more durable final product. Its uniquemicro-dimple formation pattern greatly reduces friction and helps retain oil.

ASF TREATMENT
Besides the obvious shine, ASF (Accelerated Surface Finishing)deburrs and smoothes the surface while reducing carbon buildup, possibility of stress risers and also aids in shedding oil fromthe piston underside. There are different approaches that canbe taken, either the entire piston can be treated, or just thedome and underside depending on when the process takes place.
**Consult your CP-Carrillo tech associate before deciding on
which feature or coating works best for you**

COATINGSHARD ANODIZE
Anodizing the piston reduces wear and material transfer.
Anodizing can be done to the entire piston or a selective area
depending on its usage. Anodizing the entire piston has beenshown to be very durable in drag racing applications, but somepistons require only the ring groove(s) anodized in order tolessen the chance of micro-welding the ring to the aluminum groove.

CERAMIC CROWN COATING
This coating reflects heat into the combustion chamber andaway from the piston crown, while lowering piston temperatures for increased part life. The engine can experience
improved combustion and performance as a result of heatbeing reflected back into the fuel charge.

SKIRT COAT / MOLY DRY FILM COATINGThe application of molybdenum to the piston skirt, used toreduce friction between the piston and the cylinder during
engine operation. It also helps during cold start ups and hightemperature operation where a substandard oil barrier on thecylinder wall could exist.

RICH TRADITION UNPRECEDENTED PISTON AND CONNECTING ROD MANUFACTURING

11P I S T O N S - WCHUY SCTP O- CMA R RA INL LDO S TA N D A R D

BOX STYLE FORGINGBox type pistons also have their pin bosses moved inward
toward the center of the piston, but include an additional rib tostrengthen the deck of the piston and pin bosses. These too
allow the use of shorter wristpins which promotes reduced
wrist pin deflection. The box structure actually creates a “box”
around the small end of the connecting rod. These pistons are not always lighter,but are typically stronger than traditional round style pistons and typical XForgings.

Locks, Pins & Rings
Ceramic Micro-Dimpled pins
CP-Carrillo’s Micro-Dimpled finish pins offer affordable wear protection. This unique treatment process refines and compacts
the pin’s surface texture, making it harder and more durable. The improved surface texture allows more consistent lubrication, reducing friction and decreasing chances of wrist pin galling. Available in both our 5100 Chromoly and 9310 pins, thesepins are perfect for every budget -and application.
• Strengthened surface structure• More durable, harder and consistent finish• Micro-Dimpling holds lubricant better• 1 Micron surface finish• Case hardened (computerized gas process)• Gun drilled I.D.’s• Weight tolerances +/- 1 gram• Precision ground ends• Available with chamfered ends for use with Wire Locks• Straight wall design to reduce pin bore gallingPART
W551-1500-12CP1C
W591-1650-13CP1C
W630-1650-13CP1C
W669-1650-12CP1C
W708-1850-15CP1C

PARTPART

W708-2000-15CP1C
W748-2000-15CP1C
W787-2000-15CP1C
W812-1875-15CP1C
W827-2000-15CP1C

W827-2250-16CP1C
W827-2500-15CP1C
W866-2250-15CP1C
W866-2500-12CP1C
W866-2500-15CP1C

PART

PART

W905-2250-15CP1C
W927-2000-12CP1C
W927-2250-15CP1C
W927-2250-18CP1C
W927-2500-12CP1C

W927-2500-15CP1C
W927-2750-15CP1CW928-2750-15CP1C
W945-2500-15CP1C

Ceramic Micro-Dimpled pins - Non Chamfered - Chromoly
PARTPARTPART

PART

W927-2500-15CP1S

W927-2750-15CP1S

W929-2750-15CP1S

W990-2750-15CP1S

Ceramic Micro-Dimpled pins 9310 Steel - Chamfered
PART

PART

PART

PART

PART

W708-2350-18CP3C
W748-2000-12CP3C
W787-2250-14CP3C
W787-2250-16CP3C
W827-2000-12CP3C
W866-2250-15CP3C
W866-2250-17CP3C
W866-2250-18CP3C
W866-2500-20CP3C

W866-2750-15CP3C
W905-2500-15CP3C
W927-2000-11CP3C
W927-2000-15CP3C
W927-2250-13CP3C
W927-2250-15CP3C
W927-2250-17CP3C
W927-2500-13CP3C
W927-2500-15CP3C

W927-2750-15CP3C
W927-2750-17CP3C
W927-2950-15CP3C
W927-2950-17CP3C
W928-2250-13CP3C
W928-2250-15CP3C
W928-2500-13CP3C
W928-2500-15CP3C

W928-2750-15CP3C
W928-2950-17CP3C
W929-2250-15CP3C
W929-2750-15CP3C
W929-2750-17CP3C
W929-2950-17CP3C
W990-2750-18CP3C
W990-2930-18CP3C

W990-2930-22CP3C
W991-2930-15CP3C
W991-2930-18CP3C
W991-2930-20CP3C
W991-2930-22CP3C
W992-2930-15CP3C
W992-2930-18CP3C
W992-2930-22CP3C

Ceramic Micro-Dimpled pins 9310 Steel - Non Chamfered
PARTPARTPARTPARTPART

W866-2500-15CP3S
W927-2250-15CP3S
W927-2500-13CP3S
W927-2500-15CP3S
W927-2750-13CP3S
W927-2750-15CP3S

W927-2750-17CP3S
W927-2950-13CP3S
W927-2950-15CP3S
W927-2950-23CP3S
W928-2500-15CP3S
W928-2750-15CP3S

W930-2750-15CP3S
W990-2750-13CP3S
W990-2750-15CP3S
W990-2750-18CP3S
W990-2930-15CP3S

W990-2930-18CP3S
W990-2930-20CP3S
W990-2930-22CP3S
W991-2930-15CP3S
W991-2930-18CP3S

W991-2930-20CP3SW991-2930-22CP3S
W992-2930-15CP3SW992-2930-18CP3SW992-2930-22CP3S

RICH TRADITION UNPRECEDENTED PISTON AND CONNECTING ROD MANUFACTURING115

H A R D WA R E A N D A C C E S S O R I E S

Ceramic Micro-Dimpled pins - Chamfered - Chromoly