CP Piston Kit

CP Piston Kit

$220.00$346.00

Bore

Clear

Ring Set

Clear

Wristpin

Clear

Description

CP Piston Kit

Kit includes CP-Piston, Piston Pin, Pin Clips, and Total Seal Conventional Rings with Optional Gapless 2nd ring for an additional price.
Backorderd piston kits generally have a lead time of 4-6 weeks but may vary depending on CP-Carrillo work load.

11.5:1 Compression Ratio w/ 47.6cc Chamber
Valve Pockets Cut For 37.5mm Intake & 32mm Exhaust

X-Forging

X-Forgings are designed to minimize friction and reduce weight without compromising strength. They have the side of the piston forged and their pin bosses moved inward toward the center, allowing the use of a shorter wristpin. With the use of different strut angles and bracing, an X-Forging is configured by adjusting the weight balance between high and low stress areas.

Total Seal Rings

  • Stronger, Longer life and Most Precise Tolerances
  • Saves money (fewer teardowns)
  • Thinner, Flatter and Lighter
  • Conforms Better to the Cylinder Wall
  • Works well in all applications, notably dirt environments
  • Easier on cylinders, reducing bore wear
  • Uses C33 face coating: doesn’t allows dirt to penetrate coating

Optional Gapless Ring Set

  • Increased horsepower and torque
  • Longer engine life
  • Saves money (fewer teardowns)
  • Improved consistency
  • Longer ring life
  • Better oil control
  • Less Friction
  • Increased intake signal
  • Wider torque curve
  • More engine vacuum

Optional DLC Pin

  • Enhanced surface hardiness
  • Improved surface quality
  • Low friction coefficient
  • 100% Rockwell Tested
  • 1 Micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s with 3 stages of I.D. honing
  • Weight tolerances +/- 1 gram
  • Precision ground ends with I.D. radius
  • Cryogenically treated (subzeroheat-treating process) for
    improved material strength and grain structure

Additional information

Weight 1.75 lbs
Dimensions 5 x 6 x 4 in

Piston Clearances

We measure our clearances from the bottom of the skirt. What we have found works best is to find different pieces of paper in varying thickness, measure with a micrometer and write the thickness on the paper. If the piston falls through it’s got more clearance. If it stops in the bore it’s about right, and if it must be pushed through it needs more clearance to match the paper. Clearances listed below are for air cooled engines in race trim. We did have one customer that would never install his 99mm pistons with less than .006 clearance new.

Bore Skirt – Cast Iron Skirt – Aluminium Ring End Gap Min. Head Valve – Intake Valve – Exhaust
89mm .003” .001” – .0015” .016” .055″ 0.060″ .090″
94mm .004” N/A .018″ .060″ – .0650″ 0.060″ .090″
97mm .004” .001” – .0015” .019” .065″ – .070″ 0.060″ .090″
99mm .0045” N/A .020” .065″ – .070″ 0.060″ .090″
100mm .005” .001” – .0015” .022” .065″ – .070″ 0.060″ .090″
102mm N/A .001” – .0015” .022” .065″ – .070″ 0.060″ .090″
103.1mm .0055” N/A .022” – .024” .065″ – .070″ 0.060″ .090″