Forged Pistons for Acura/Honda, 87.5mm, K20A/A2 10.2:1, or K24A 11.5:1 (No K20A3 head) ( (CP Pistons SC71451)
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|
Make |
Acura/Honda |
|
Model |
K24 w/K20A/A2 |
|
Part Number |
SC71451 |
|
Cylinders |
4 |
|
Bore (in) |
3.445 |
|
Bore (mm) |
87.5 |
|
Size |
+0.5mm |
|
Stroke |
99 |
|
Conrod |
152 |
|
Comp Height (in) |
1.181 |
|
Comp Height (mm) |
30 |
|
Dom/Dish CC |
-0.4 |
|
Compression Ratio |
11.5 |
|
Weight (Grams) |
340 |
|
Pin (mm) |
22 |
|
Rings |
CPN-3445 |
|
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, 87.5mm, K20A/A2 10.2:1, or K24A 11.5:1 (No K20A3 head) ( (CP Pistons SC71451) |
|---|---|
| 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 K24A engines?
The SC71451 pistons provide a compression ratio of 11.5:1 when used in K24A engines. This is suitable for performance builds aiming for higher power outputs.
Can these pistons be used with K20A3 heads?
No, these pistons are not compatible with K20A3 heads. They are specifically designed for K20A/A2 and K24A applications.
What is the recommended bore clearance for these pistons?
Bore clearance should be set according to the engine builder's specifications, typically around 0.0015” to 0.0025” for forged pistons, but always confirm with your specific engine setup.
What type of wrist pins are included with these pistons?
The SC71451 pistons come with standard wrist pins (part number 866-2250-15CP1C) included at no additional cost. Upgraded and ultra-duty pins are also available for those seeking higher performance.
What machining considerations should I keep in mind when installing these pistons?
Ensure that the cylinder bore is properly honed for the 87.5mm size, and verify that the ring gaps are set correctly. Additionally, check for any necessary clearances with your conrods and crankshaft to avoid interference.
