Small Block Chevy Dome +5.5cc All 23 Heads 4.030 Bore,3.250 stroke, 5.700 rod 11.1 to 1 comp with a 62cc head (CP Bullets BC1047-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1047-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.25 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.68 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.255 |
|
Dom/Dish CC |
5.5 |
|
Compression Ratio |
11.1 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
332 |
|
Piston Weight |
503 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5.5cc All 23 Heads 4.030 Bore,3.250 stroke, 5.700 rod 11.1 to 1 comp with a 62cc head (CP Bullets BC1047-030) |
|---|---|
| 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 is the recommended bore clearance for the BC1047-030 pistons?
For the BC1047-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on the specific application and builder preferences.
What compression ratio can I expect with the BC1047-030 pistons and 62cc heads?
The BC1047-030 pistons are designed to achieve an 11.1:1 compression ratio when used with 62cc cylinder heads. Ensure that all components are compatible and properly machined to achieve this ratio reliably.
Do I need to modify my cylinder heads to use the BC1047-030 pistons?
The BC1047-030 pistons feature two valve reliefs, which should accommodate most standard 23-degree heads. However, it's advisable to check for clearance with your specific camshaft and head combination to avoid interference.
What is the weight of the BC1047-030 pistons and how does it affect performance?
The BC1047-030 pistons weigh 503 grams each. While lighter pistons can improve engine response and reduce rotating mass, ensure that your connecting rods and crankshaft are rated to handle the overall assembly weight and intended RPM range.
What type of rings should I use with the BC1047-030 pistons?
The BC1047-030 pistons are designed to work with 1.5mm x 1.5mm x 3.0mm ring sets. Choose high-quality rings suitable for your application, and ensure proper ring gap settings are followed for optimal performance.
