Small Block Chevy Dome +5cc All 23 Heads 4.155 Bore,4.000 stroke, 6.000 rod 13.9 to 1 comp with a 62cc head (CP Bullets BC1112-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1112-030 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6 |
|
Comp Height |
1 |
|
Head Type |
All 23 deg |
|
Head CC |
62 |
|
Dome / Dish Height |
0.235 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
13.9 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
434 |
|
Piston Weight |
424 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.155 Bore,4.000 stroke, 6.000 rod 13.9 to 1 comp with a 62cc head (CP Bullets BC1112-030) |
|---|---|
| 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 BC1112-030 pistons?
For the BC1112-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on the specific application and operating conditions, so it's best to consult with your engine builder for precise measurements.
What compression ratio can I expect with these pistons in my Small Block Chevy?
These pistons are designed to achieve a compression ratio of 13.9:1 when used with a 62cc cylinder head. Keep in mind that actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What type of valve reliefs do the BC1112-030 pistons have?
The BC1112-030 pistons feature two valve reliefs, which are designed to accommodate typical Small Block Chevy valve sizes and clearances. Ensure your valve train setup is compatible to avoid interference.
What is the weight of the BC1112-030 pistons, and how does it affect performance?
The BC1112-030 pistons weigh 424 grams each. While lighter pistons can improve engine response and reduce reciprocating mass, it's essential to balance them with the rest of the rotating assembly for optimal performance.
Do I need to modify my engine for these pistons to fit?
Installation of the BC1112-030 pistons may require modifications such as honing the cylinder bores for proper clearance and ensuring the connecting rods are compatible. Always verify fitment with your specific engine setup.
