Forged Pistons for Toyota 4AGE 20V 81.5 12:1 ( CP Pistons SC7659)
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|
Make |
Toyota |
|
Model |
4AG 20V |
|
Part Number |
SC7659 |
|
Cylinders |
4 |
|
Bore (in) |
3.209 |
|
Bore (mm) |
81.5 |
|
Size |
+0.5mm |
|
Stroke |
77 |
|
Conrod |
122 |
|
Comp Height (in) |
1.208 |
|
Comp Height (mm) |
30.7 |
|
Dom/Dish CC |
6 |
|
Compression Ratio |
12 |
|
Weight (Grams) |
281 |
|
Pin (mm) |
20 |
|
Rings |
CPN-3209 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
787-2250-16CP1C |
|
Upgraded Pin |
787-2250-18CP3C |
|
Ultra Duty Pin |
787-2250-24CP3C |
|
Locks |
787X050 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 Toyota 4AGE 20V 81.5 12:1 ( CP Pistons SC7659) |
|---|---|
| Brands | CP Carrillo |
| Engine | 4AGE |
| Make | Toyota |
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 SC7659 pistons?
For the SC7659 pistons, a typical bore clearance of 0.0015" to 0.0025" is recommended. This allows for thermal expansion and ensures proper fitment in the Toyota 4AGE 20V engine. Always verify with your specific application and machining tolerances.
What compression ratio can I expect with the SC7659 pistons?
The SC7659 pistons have a compression ratio of 12:1 when used with the standard 4AGE 20V configuration. This ratio is suitable for high-performance applications, but be mindful of fuel quality and tuning to avoid detonation.
Are the wrist pins included with the SC7659 pistons suitable for high RPM applications?
Yes, the wrist pins included with the SC7659 pistons are designed for high-performance use and are suitable for high RPM applications. However, ensure proper lubrication and fitment to maintain reliability under stress.
What type of ring gaps should I use with the SC7659 pistons?
For the SC7659 pistons, it is recommended to set the top ring gap between 0.018" to 0.020" and the second ring gap between 0.016" to 0.018". Adjustments may be necessary based on your specific engine setup and intended use.
Can the SC7659 pistons accommodate oversized valves?
Yes, the SC7659 pistons feature deep valve reliefs that can accommodate oversized valves and high lift camshafts, making them suitable for performance builds that require such modifications.
