Harley Twin Cam, 98 cu in, 3.937 bore, 4.000 stroke, 7.667 rod, 9.5:1 CR, 85cc head
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Harley Twin Cam, 98 cu in, 3.937 bore, 4.000 stroke, 7.667 rod, 9.5:1 CR, 85cc head
|
Make |
Harley Davidson |
|
Engine Size |
98 CI |
|
Model |
Twin Cam |
|
Bore (in) |
3.937 |
|
Stroke (in) |
4 |
|
Comp Ratio |
9.5:1 |
|
Dome CC |
-1.6 |
|
Comp Height |
1.265 |
|
Piston Part Number |
BHM98FT |
|
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, 98 cu in, 3.937 bore, 4.000 stroke, 7.667 rod, 9.5:1 CR, 85cc head |
|---|---|
| Brands | CP Carrillo |
Delivery & Freight
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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 BHM98FT pistons?
For the BHM98FT pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. This ensures proper thermal expansion and prevents piston seizure during operation. Always verify with your specific engine build requirements.
What type of rings are included with the BHM98FT piston kit?
The BHM98FT piston kit includes RS1MG660-3937-THG rings, which are designed for performance applications. Ensure to follow the manufacturer's guidelines for ring end gaps and installation for optimal performance.
Can I use the BHM98FT pistons with stock Harley Twin Cam conrods?
Yes, the BHM98FT pistons are compatible with stock Harley Twin Cam conrods, but it's essential to check for proper clearance and fitment. Machining may be required to achieve the correct clearances.
What is the compression height of the BHM98FT pistons?
The compression height of the BHM98FT pistons is 1.265 inches. This measurement is critical for ensuring the correct compression ratio and overall engine performance.
What material are the BHM98FT pistons made from?
The BHM98FT pistons are forged from high-strength 2618 alloy, which provides excellent durability and performance under high-stress conditions typical of performance engines.
