Small Block Chevy Flat Top -6.83cc All 23 Heads 4.035 Bore,3.750 stroke, 6.000 rod 10.5 to 1 comp with a 64cc head (CP Bullets BC1025-035)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1025-035 |
|
Bore (in) |
4.035 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.8 |
|
Compression Ratio |
10.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
384 |
|
Piston Weight |
392 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.035 Bore,3.750 stroke, 6.000 rod 10.5 to 1 comp with a 64cc head (CP Bullets BC1025-035) |
|---|---|
| Brands | CP Carrillo |
| Make | GM |
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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 bore clearance for the BC1025-035 pistons?
For the BC1025-035 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This will ensure proper expansion and prevent scuffing during operation. Always verify with your specific engine build requirements.
What compression ratio can I expect with the BC1025-035 pistons and 64cc heads?
The BC1025-035 pistons are designed to achieve a compression ratio of 10.5:1 when used with 64cc cylinder heads. However, actual compression may vary based on factors like head gasket thickness and machining tolerances.
Do I need to machine the piston for valve clearance with these pistons?
The BC1025-035 pistons feature two valve reliefs, which should provide adequate clearance for most applications. However, it's essential to check valve-to-piston clearance during assembly, especially with high-lift camshafts.
What is the weight of the BC1025-035 pistons and how does it affect my engine?
The BC1025-035 pistons weigh 392 grams each. This weight is suitable for performance applications, but keep in mind that lighter pistons can reduce reciprocating mass, potentially improving engine response and RPM capability.
What type of rings should I use with the BC1025-035 pistons?
The BC1025-035 pistons come with a ring thickness of 1.5 x 1.5 x 3.0mm. It's advisable to use high-performance rings compatible with these dimensions, ensuring proper sealing and durability under high loads.
