Forged Pistons for Honda, F20C, 87.5mm, CH 1.131, 8.4:1 or F22C, 9:1 (CP Pistons SC7071)
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|
Make |
Honda |
|
Model |
F20C |
|
Part Number |
SC7071 |
|
Cylinders |
4 |
|
Bore (in) |
3.445 |
|
Bore (mm) |
87.5 |
|
Size |
+0.5mm |
|
Stroke |
84 |
|
Conrod |
153 |
|
Comp Height (in) |
1.131 |
|
Comp Height (mm) |
28.7 |
|
Dom/Dish CC |
-8 |
|
Compression Ratio |
8.4 |
|
Weight (Grams) |
321 |
|
Pin (mm) |
23 |
|
Rings |
CPN-3445 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
905-2250-15CP1C |
|
Upgraded Pin |
905-2250-19CP3C |
|
Ultra Duty Pin |
905-2250-26CP3C |
|
Locks |
905x073 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 Honda, F20C, 87.5mm, CH 1.131, 8.4:1 or F22C, 9:1 (CP Pistons SC7071) |
|---|---|
| Brands | CP Carrillo |
| Engine | F20, F22 |
| 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 can I achieve with the SC7071 pistons in my F20C or F22C engine?
The SC7071 pistons provide a compression ratio of 8.4:1 when used in the F20C engine and 9:1 in the F22C engine. Ensure that your engine is properly tuned to optimise performance and reliability.
What is the recommended bore clearance for the SC7071 pistons?
The recommended bore clearance for the SC7071 pistons should be determined by the engine builder, taking into account the specific application and desired performance. Typically, a clearance of 0.0015" to 0.0025" is common for performance applications, but always verify with your specific setup.
Do I need to modify my engine for the SC7071 pistons?
While the SC7071 pistons are designed to accommodate oversized valves and high lift camshafts, you may need to ensure that your engine's cylinder head has adequate clearance for these features. It's advisable to check valve reliefs and piston-to-valve clearance during assembly.
What type of wrist pin is included with the SC7071 pistons?
The SC7071 pistons come with a standard wrist pin (part number 905-2250-15CP1C) included at no additional cost. If you require a stronger option, consider upgrading to the ultra-duty pin (part number 905-2250-26CP3C) for increased durability.
How are the SC7071 pistons balanced?
The SC7071 pistons are fully CNC machined and balanced to within +/- 1 gram, ensuring consistent performance and reliability. It's crucial to balance the entire rotating assembly, including the crankshaft and conrods, for optimal engine performance.
