Forged Pistons for Acura/Honda, K20A/A2/A3, 86.5mm, 9.5:1 ( (CP Pistons SC70456)
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|
Make |
Acura/Honda |
|
Model |
K20A/A2/A3 |
|
Part Number |
SC70456 |
|
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 |
-3.3 |
|
Compression Ratio |
9.5 FT |
|
Weight (Grams) |
316 |
|
Pin (mm) |
22 |
|
Rings |
CPN-3406 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
866-2250-20CP1C |
|
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/A3, 86.5mm, 9.5:1 ( (CP Pistons SC70456) |
|---|---|
| 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 CP Pistons SC70456?
For the CP Pistons SC70456, a typical bore clearance of 0.0015" to 0.0025" is recommended. However, this can vary based on the specific application and the builder's preferences, so always consult with your engine builder for the best fit.
What compression ratio can I expect with these pistons in a K20 engine?
The CP Pistons SC70456 are designed for a compression ratio of 9.5:1 when used with a standard K20A/A2/A3 setup. Keep in mind that actual compression may vary based on head gasket thickness and any modifications to the combustion chamber.
Are these pistons compatible with high lift camshafts?
Yes, the CP Pistons SC70456 feature deep valve reliefs that accommodate high lift camshafts, making them suitable for performance applications where increased lift is required.
What type of wrist pin is included with these pistons?
The CP Pistons SC70456 come with standard wrist pins (part number 866-2250-20CP1C) included at no additional cost. Upgraded and ultra-duty pins are also available for those seeking additional strength.
What machining processes are required for these pistons?
Before installation, ensure that the piston bore is honed to the correct size and that the ring gaps are set according to your specific application. It's crucial to balance the entire rotating assembly for optimal performance.
