Forged Pistons for Acura/Honda, K20A/A2, 86.5mm, 11.5:1 ( (CP Pistons SC71401)
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|
Make |
Acura/Honda |
|
Model |
K20A/A2 |
|
Part Number |
SC71401 |
|
Cylinders |
4 |
|
Bore (in) |
3.406 |
|
Bore (mm) |
86.5 |
|
Size |
+0.5mm |
|
Stroke |
86 |
|
Conrod |
139 |
|
Comp Height (in) |
1.181 |
|
Comp Height (mm) |
30 |
|
Dom/Dish CC |
8 |
|
Compression Ratio |
11.5 |
|
Weight (Grams) |
334 |
|
Pin (mm) |
22 |
|
Rings |
CPN-3406 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
866-2250-15CP1C |
|
Upgraded Pin |
866-2250-20CP3C |
|
Ultra Duty Pin |
866-2250-25CP3C |
|
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, K20A/A2, 86.5mm, 11.5:1 ( (CP Pistons SC71401) |
|---|---|
| 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 is the recommended bore clearance for the SC71401 pistons?
For the SC71401 pistons, a typical bore clearance of 0.0015" to 0.0020" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for precise measurements.
What type of rings are included with the SC71401 pistons?
The SC71401 pistons come with high-performance CP rings, specifically designed for durability and performance. The ring thickness is 1.0 x 1.2 x 2.8mm, suitable for high-revving applications.
What is the maximum recommended RPM for the SC71401 pistons?
While the SC71401 pistons are designed for high-performance applications, the maximum RPM will depend on the overall engine build, including rod and crankshaft specifications. Typically, they can handle RPMs in the range of 8,000 to 9,000, but ensure your engine is properly balanced and tuned.
Do the SC71401 pistons require any special machining?
Yes, the SC71401 pistons may require specific machining for optimal fitment, including checking bore size and ensuring correct ring gap settings. It's crucial to work with a qualified engine builder to achieve the best results.
What is the weight of the SC71401 pistons and how does it affect performance?
The SC71401 pistons weigh 334 grams each. Lighter pistons can improve engine response and reduce reciprocating mass, which can enhance performance, especially in high-revving applications. However, ensure that the overall engine balance is maintained.
