Forged Pistons for Acura/Honda, 89mm, K20A/A2 12.5:1, or K24A 14.5:1 lightweight (CP (CP Pistons SC71424XA)
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|
Make |
Acura/Honda |
|
Model |
K20A/A2 |
|
Part Number |
SC71424XA |
|
Cylinders |
4 |
|
Bore (in) |
3.504 |
|
Bore (mm) |
89 |
|
Size |
+3.0mm |
|
Stroke |
86 |
|
Conrod |
139 |
|
Comp Height (in) |
1.181 |
|
Comp Height (mm) |
30 |
|
Dom/Dish CC |
9.8 |
|
Compression Ratio |
12.5 |
|
Weight (Grams) |
315 |
|
Pin (mm) |
22 |
|
Rings |
CPN-3504 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
866-2000-15CP1C |
|
Upgraded Pin |
866-2000-17CP3C |
|
Ultra Duty Pin |
NA |
|
Locks |
866x063 SWL |
CP pistons are compatible with oversized valves and high lift camshafts. CP Pistons represent the highest quality and is engineered for maximum power. Standard features include: Deep valve reliefs accommodate high lift camshafts; Larger valve reliefs for +1mm valve sizes; Custom skirt cam and barrel design; Accumulator grooves; High strength aluminum forgings; High performance rings; Fully CNC machined and balanced to +/- 1 gram; Wrist pins included at no additional cost; Double pin oilers force fed from oil ring groove; Pin lock grooves for easy lock removal; Pin fitting included.
| Product Name | Forged Pistons for Acura/Honda, 89mm, K20A/A2 12.5:1, or K24A 14.5:1 lightweight (CP (CP Pistons SC71424XA) |
|---|---|
| Brands | CP Carrillo |
| Engine | K20 |
| Make | Honda |
Delivery & Freight
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What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What compression ratio do these pistons provide for the K20A/A2 and K24A engines?
The SC71424XA pistons offer a compression ratio of 12.5:1 for the K20A/A2 engine and 14.5:1 for the K24A engine. This high compression is suitable for performance applications but requires careful tuning and fuel quality to ensure reliability.
What is the recommended bore clearance for these pistons?
The bore clearance for the SC71424XA pistons should be set according to the engine builder's specifications, typically around 0.0015" to 0.0025". This ensures proper thermal expansion and prevents piston slap, especially under high RPM conditions.
Can these pistons accommodate oversized valves?
Yes, the SC71424XA pistons feature deep valve reliefs designed to accommodate oversized valves and high lift camshafts, making them suitable for high-performance builds.
What type of wrist pins are included with these pistons?
The SC71424XA pistons come with standard wrist pins (part number 866-2000-15CP1C) included at no additional cost. Upgraded pins are available separately if needed for specific applications.
What machining is required for proper fitment of these pistons?
Before installation, ensure that the cylinder bore is honed to the correct size for these 89mm pistons. Additionally, check ring gaps and adjust as necessary to suit your engine's specifications and intended use.
