Harley Twin Cam, 103 cu in, 3.875 bore, 4.375 stroke, 7.667 rod, 10.75:1 CR, 85cc head
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Harley Twin Cam, 103 cu in, 3.875 bore, 4.375 stroke, 7.667 rod, 10.75:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
103 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.875 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.75:1 |
|
Dome CC |
5.5 |
|
Comp Height |
1.085 |
|
Piston Part Number |
BHM5080 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2250-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS1660-3875-0THG |
|
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, 3.875 bore, 4.375 stroke, 7.667 rod, 10.75:1 CR, 85cc head |
|---|---|
| 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 piston to cylinder clearance for the BHM5080 pistons?
For the BHM5080 pistons, a typical piston to cylinder clearance is around 0.0030" to 0.0035". However, it's crucial to confirm this with your specific engine setup and follow the manufacturer's guidelines.
What type of rings are included with the BHM5080 piston kit?
The BHM5080 piston kit includes RS1660-3875-0THG rings, which are designed for optimal sealing and performance in high-performance applications. Ensure you follow the recommended ring gap specifications during installation.
Can I use the BHM5080 pistons with a stock Harley Davidson Twin Cam engine?
Yes, the BHM5080 pistons can be used with a stock Harley Davidson Twin Cam engine, but modifications may be necessary depending on your specific build and performance goals. It's essential to check for proper clearance and compatibility with your existing components.
What is the compression ratio of the BHM5080 pistons and how does it affect performance?
The BHM5080 pistons have a compression ratio of 10.75:1. This higher compression can improve power output and throttle response, but it also requires careful tuning and possibly higher octane fuel to prevent detonation.
What is the material used for the BHM5080 pistons and what are its benefits?
The BHM5080 pistons are forged from high-strength 2618 alloy, which offers excellent durability and thermal resistance. This material is ideal for high-performance applications, providing reliability under increased stress and heat.
