Forged Pistons for Acura/Honda, 89mm, K20A 9:1 or K24A 10.3:1 (CP Pistons SC70404)
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|
Make |
Acura/Honda |
|
Model |
K20A/A2/A3 |
|
Part Number |
SC70404 |
|
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 |
-10.4 |
|
Compression Ratio |
9 |
|
Weight (Grams) |
341 |
|
Pin (mm) |
22 |
|
Rings |
CPN-3504 |
|
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, 89mm, K20A 9:1 or K24A 10.3:1 (CP Pistons SC70404) |
|---|---|
| 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 compression ratio for the SC70404 pistons in a K20A engine?
The SC70404 pistons have a compression ratio of 9:1 when used in a K20A engine. For the K24A engine, the compression ratio is 10.3:1. Ensure that your engine is built and tuned to accommodate these ratios for optimal performance.
What machining is required for the SC70404 pistons?
When installing SC70404 pistons, it's essential to check bore clearance and ensure proper ring gap settings. The pistons should be fitted to a bore size of 89mm, and any necessary honing should be performed to achieve the correct clearances.
Can the SC70404 pistons accommodate high lift camshafts?
Yes, the SC70404 pistons are designed with deep valve reliefs to accommodate high lift camshafts and oversized valves. This feature allows for improved airflow and performance in modified K20 and K24 engines.
What is the weight of the SC70404 pistons?
Each SC70404 piston weighs approximately 341 grams. This lightweight design contributes to reduced reciprocating mass, enhancing engine responsiveness and performance.
What type of wrist pins are included with the SC70404 pistons?
The SC70404 pistons 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.
