Harley Twin Cam, 103 cu in,3.885 bore, 4.375 stroke, 10.25:1
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Harley Twin Cam, 103 cu in,3.885 bore, 4.375 stroke, 10.25:1
|
Make |
Harley Davidson |
|
Engine Size |
103 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.885 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.25:1 |
|
Dome CC |
1.4 |
|
Comp Height |
1.092 |
|
Piston Part Number |
M5025 |
|
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) |
ROP |
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, 10.25:1 |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
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If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
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 M5025 pistons?
For the M5025 pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. However, it's crucial to confirm this with your specific engine build and ensure proper fitting.
What type of rings are included with the M5025 piston kit?
The M5025 piston kit includes RS111A-3885-0 rings, which are designed to work optimally with the pistons for performance applications. Ensure proper installation and gap settings as per the supplied instructions.
What is the expected compression ratio with the M5025 pistons in a Harley Twin Cam engine?
The M5025 pistons provide a compression ratio of 10.25:1 when used in a Harley Twin Cam engine with a 3.885" bore and 4.375" stroke. This ratio is suitable for performance applications but should be verified with your specific engine setup.
What material are the M5025 pistons made from?
The M5025 pistons are forged from high strength 2618 alloy, which offers excellent durability and performance characteristics, making them suitable for high-performance applications.
How are the M5025 pistons balanced?
The M5025 pistons are balanced to within +/- 1 gram, ensuring consistency and reliability in performance. Proper balancing is essential for optimal engine operation and longevity.
