Harley Twin Cam, 107 cu in, 3.937 bore, 4.375 stroke, 7.667 rod, 10.75:1 CR, 85cc head
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Harley Twin Cam, 107 cu in, 3.937 bore, 4.375 stroke, 7.667 rod, 10.75:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
107 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.937 |
|
Stroke (in) |
4.375 |
|
Comp Ratio |
10.75:1 |
|
Dome CC |
3 |
|
Comp Height |
1.085 |
|
Piston Part Number |
BHM107-3 |
|
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, 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 are the recommended piston to cylinder clearances for the BHM107-3 pistons?
For the BHM107-3 pistons, it is crucial to follow the manufacturer's specifications for piston to cylinder clearances. Typically, this will depend on the specific application and intended use of the engine. Ensure to consult the supplied instructions for the correct clearances tailored to your setup.
What is the significance of the 10.75:1 compression ratio in the BHM107-3 pistons?
The 10.75:1 compression ratio of the BHM107-3 pistons is designed to optimise performance and efficiency in the Harley Twin Cam engine. This ratio can provide a good balance of power and reliability, but it is essential to ensure that your engine is tuned correctly and that high-quality fuel is used to prevent detonation.
How should I install the BHM107-3 pistons in my Harley Twin Cam engine?
When installing the BHM107-3 pistons, ensure that the piston rings are properly aligned and that the wrist pins are secured with the provided clips. It is also important to follow the correct torque specifications for the connecting rod bolts and to check for any required machining or clearances before final assembly.
What materials are used in the construction of the BHM107-3 pistons?
The BHM107-3 pistons are forged from high strength 2618 alloy, which provides excellent durability and performance under high-stress conditions. This material choice helps to ensure reliability and longevity in performance applications.
