Harley Twin Cam, 103 cu in, 3.885 bore, 4.375 stroke, 11.25:1
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Harley Twin Cam, 103 cu in, 3.885 bore, 4.375 stroke, 11.25:1
|
Make |
Harley Davidson |
|
Engine Size |
103 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.885 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
11.25:1 |
|
Dome CC |
10.5 |
|
Comp Height |
1.083 |
|
Piston Part Number |
M5085 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2500-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS111A-3885-0 |
|
Shelf (RPO) or Made to Order (MTO) |
MTO |
Proudly made in the USA by CP Carrillo Pistons!
- Fully CNC machined
- Balanced to +/- 1 gram
- Double forced pin oilers
- Forged from high strength 2618 alloy
- Designed for maximum performance, horsepower and reliability
- Complete kit includes two pistons, ring sets, wrist pins and clips
- Follow ring end gap and piston to cylinder clearances as per the supplied instructions
| Product Name | Harley Twin Cam, 103 cu in, 3.885 bore, 4.375 stroke, 11.25:1 |
|---|---|
| Brands | CP Carrillo |
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 M5085 pistons?
For the M5085 pistons, it is crucial to set the bore clearance according to the specific application and the builder's preference. Typically, a clearance of 0.0025" to 0.0035" is common for performance applications, but always refer to the manufacturer's guidelines and adjust based on your engine's specific requirements.
What type of rings are included with the M5085 piston kit?
The M5085 piston kit includes RS111A-3885-0 rings. These are designed to provide optimal sealing and performance. Ensure that you follow the recommended specifications for ring end gaps and installation to achieve the best results.
What is the compression height of the M5085 pistons?
The compression height of the M5085 pistons is 1.083 inches. This measurement is critical for achieving the desired compression ratio and ensuring proper fitment within the engine.
What material are the M5085 pistons made from?
The M5085 pistons are forged from high strength 2618 alloy. This material is known for its durability and ability to withstand high temperatures and pressures, making it suitable for performance applications.
How should the M5085 pistons be installed in the engine?
When installing the M5085 pistons, ensure that the piston-to-cylinder clearance is set correctly and that the ring gaps are aligned according to the supplied instructions. Proper lubrication and careful handling during installation will also help prevent damage and ensure optimal performance.
