Small Block Chevy Dome +5cc All 23 Heads 4.030 Bore,3.750 stroke, 5.700 rod 12.2 to 1 comp with a 64cc head (CP Bullets BC1046-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1046-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.425 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
11.8 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
383 |
|
Piston Weight |
458 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.030 Bore,3.750 stroke, 5.700 rod 12.2 to 1 comp with a 64cc head (CP Bullets BC1046-030) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 compression ratio can I expect with the BC1046-030 pistons?
The BC1046-030 pistons are designed to achieve a compression ratio of approximately 12.2:1 when used with a 64cc cylinder head. However, actual compression may vary based on specific engine assembly and machining tolerances.
What is the recommended bore clearance for these pistons?
For optimal performance, it is crucial to set the bore clearance according to your specific engine build. A typical range for performance applications is around 0.0030" to 0.0040", but always verify with your engine builder to ensure proper fitment.
Do I need to modify my cylinder heads for these pistons?
The BC1046-030 pistons feature two valve reliefs, which should accommodate most 23-degree cylinder heads. However, it's essential to check for clearance with your specific camshaft and valve train setup to avoid any interference.
What is the weight of the BC1046-030 pistons, and how does it affect my engine?
The BC1046-030 pistons weigh 458 grams. While this weight is typical for performance applications, it's important to consider the overall rotating assembly balance and how it may impact engine RPM and reliability.
What type of rings should I use with these pistons?
The BC1046-030 pistons come with a ring thickness specification of 1.5 x 1.5 x 3.0mm. Ensure you select high-quality rings that match these dimensions and are suitable for your intended application, whether it be street or race.
