Forged Pistons for Audi/ VW, 1.8L 20 Valve (Stroker) 20mm pin, 82mm, 9.5:1 (CP Pistons SC7617)
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|
Make |
Audi/VW |
|
Model |
1.8L 20 Valve (Stroker) |
|
Part Number |
SC7617 |
|
Cylinders |
4 |
|
Bore (in) |
3.228 |
|
Bore (mm) |
82 |
|
Size |
+1.0mm |
|
Stroke |
92.8 |
|
Conrod |
144 |
|
Comp Height (in) |
1.16 |
|
Comp Height (mm) |
29.5 |
|
Dom/Dish CC |
-6.9 |
|
Compression Ratio |
9.5 |
|
Weight (Grams) |
283 |
|
Pin (mm) |
20 |
|
Rings |
CPN-3228 |
|
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 Audi/ VW, 1.8L 20 Valve (Stroker) 20mm pin, 82mm, 9.5:1 (CP Pistons SC7617) |
|---|---|
| Brands | CP Carrillo |
| Engine | 1.8L 20 Valve - stroker |
| Make | Audi |
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 SC7617?
The recommended bore clearance for the CP Pistons SC7617 is typically between 0.0020" to 0.0025". However, this can vary based on specific engine conditions and the builder's preferences, so always consult with your engine builder for the best fit.
What type of ring gaps should I set for the CP Pistons SC7617?
For the CP Pistons SC7617, a common starting point for ring gaps is 0.004" per inch of bore. Given the 82mm bore, this translates to approximately 0.016" for the top ring. Adjustments may be necessary based on your specific application, boost levels, and RPM range.
Can I use these pistons with a stock conrod?
While the CP Pistons SC7617 can technically be used with stock conrods, it is highly recommended to use performance conrods designed for higher power applications to ensure reliability and strength, especially in a stroker setup.
What is the compression ratio of the CP Pistons SC7617 and how does it affect performance?
The CP Pistons SC7617 has a compression ratio of 9.5:1. This ratio is suitable for a balance of performance and reliability, particularly in turbocharged applications. However, tuning and fuel quality will significantly impact the engine's performance and reliability.
What machining processes are required when installing the CP Pistons SC7617?
When installing the CP Pistons SC7617, ensure the engine block is honed to the correct bore size and that the piston ring lands are properly machined. Additionally, check for clearances with the conrods and ensure the crankshaft is balanced with the full rotating assembly for optimal performance.
