Harley Twin Cam, 107 cu in, 3.937 bore, 4.375 stroke, 7.667 rod, 11:1 CR, 85cc head
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Harley Twin Cam, 107 cu in, 3.937 bore, 4.375 stroke, 7.667 rod, 11:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
107 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.937 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
11.1:1 |
|
Dome CC |
6 |
|
Comp Height |
1.085 |
|
Piston Part Number |
BHM107-6 |
|
Conrod Part Nmber |
PSR6161 |
|
Pint Part Number |
927-2250-15CP1C |
|
Locks Part Number |
927x073 SWL |
|
Rings |
RS1MG660-3937-THG |
|
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, 107 cu in, 3.937 bore, 4.375 stroke, 7.667 rod, 11:1 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 BHM107-6 pistons?
For the BHM107-6 pistons, a typical piston to cylinder clearance is around 0.0025" to 0.0035". However, it's essential to consult the specific engine build instructions and adjust based on your application and tolerances.
What type of rings are included with the BHM107-6 piston kit?
The BHM107-6 piston kit includes RS1MG660-3937-THG rings, which are designed for optimal sealing and performance. Ensure you follow the manufacturer's guidelines for installation and ring gap settings.
Can I use the BHM107-6 pistons with a stock Harley Twin Cam setup?
While the BHM107-6 pistons can be used in a stock Harley Twin Cam setup, achieving the best performance may require modifications to the engine, such as tuning and possibly upgrading the fuel system to handle the increased compression ratio of 11:1.
What are the benefits of the 2618 alloy used in BHM107-6 pistons?
The 2618 alloy used in BHM107-6 pistons provides high strength and excellent durability, making them suitable for high-performance applications. This alloy can withstand higher temperatures and pressures, which is beneficial for performance builds.
How should I prepare the BHM107-6 pistons before installation?
Before installation, ensure the BHM107-6 pistons are clean and free from debris. Check the ring gaps and adjust as necessary, and verify the piston to cylinder clearance. It's also advisable to lubricate the piston skirts and rings with engine oil before assembly.
