Forged Pistons for Mini Cooper S, 1.6L Tritec, 77.5mm, 8.3:1 (CP Pistons SC7511)
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|
Make |
Mini Cooper S |
|
Model |
Tritec 1.6L |
|
Part Number |
SC7511 |
|
Cylinders |
4 |
|
Bore (in) |
3.051 |
|
Bore (mm) |
77.5 |
|
Size |
+0.5mm |
|
Stroke |
85.8 |
|
Conrod |
131.5 |
|
Comp Height (in) |
1.043 |
|
Comp Height (mm) |
26.5 |
|
Dom/Dish CC |
-1.7 |
|
Compression Ratio |
8.3 |
|
Weight (Grams) |
231 |
|
Pin (mm) |
21 |
|
Rings |
CPN-3051 |
|
Ring Thickness |
1.0 x 1.2 x 2.8mm |
|
Pin included (Standard) |
827-2250-16CP1C |
|
Upgraded Pin |
827-2250-20CP3C |
|
Ultra Duty Pin |
827-2250-25CP3C |
|
Locks |
827x063 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 Mini Cooper S, 1.6L Tritec, 77.5mm, 8.3:1 (CP Pistons SC7511) |
|---|---|
| Brands | CP Carrillo |
| Engine | Tritec |
| Make | BMW, Mini |
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 SC7511 pistons?
For the SC7511 pistons, a typical bore clearance of 0.0015" to 0.0025" is recommended. This allows for thermal expansion and ensures proper piston operation within the cylinder. Always verify with your engine builder for specific requirements based on your setup.
What compression ratio will I achieve with the SC7511 pistons in my Mini Cooper S?
The SC7511 pistons provide a compression ratio of 8.3:1 when used in the Tritec 1.6L engine. This ratio is suitable for moderate boost applications, but final performance will depend on tuning, fuel quality, and overall engine setup.
What type of wrist pins are included with the SC7511 pistons?
The SC7511 pistons come with standard wrist pins (827-2250-16CP1C) included at no additional cost. For higher performance needs, upgraded (827-2250-20CP3C) and ultra-duty pins (827-2250-25CP3C) are available as options.
Do the SC7511 pistons accommodate high lift camshafts?
Yes, the SC7511 pistons feature deep valve reliefs designed to accommodate high lift camshafts and oversized valves, making them suitable for performance applications where increased airflow is required.
What machining processes are necessary for the SC7511 pistons?
When installing SC7511 pistons, ensure that the cylinder bores are honed to the correct size for the pistons and that the ring gaps are set according to your specific application. Additionally, confirm that the piston-to-wall clearance is within recommended limits for optimal performance.
