Small Block Chevy Dome +5cc All 23 Heads 4.145 Bore,3.875 stroke, 6.000 rod 13.2 to 1 comp with a 64cc head (CP Bullets BC1220-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1220-020 |
|
Bore (in) |
4.145 |
|
Stroke (in) |
3.875 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.062 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.235 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
13.1 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
418 |
|
Piston Weight |
438 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.145 Bore,3.875 stroke, 6.000 rod 13.2 to 1 comp with a 64cc head (CP Bullets BC1220-020) |
|---|---|
| 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 compression ratio for the BC1220-020 pistons with a 64cc head?
The BC1220-020 pistons are designed to achieve a compression ratio of approximately 13.1 to 1 when used with a 64cc head. Ensure that your engine is properly machined and tuned to handle this level of compression.
What bore and stroke specifications are compatible with the BC1220-020 pistons?
The BC1220-020 pistons are designed for a bore of 4.145 inches and a stroke of 3.875 inches, making them suitable for a Small Block Chevy engine with a 6.000-inch rod length.
What are the valve relief specifications for the BC1220-020 pistons?
The BC1220-020 pistons feature two valve reliefs, which are essential for clearance with the valves in a Small Block Chevy engine. Ensure that your cylinder heads are compatible with these reliefs to avoid interference.
What is the weight of the BC1220-020 pistons, and how does it affect engine performance?
The BC1220-020 pistons weigh 438 grams. While lighter pistons can improve engine response and reduce reciprocating mass, ensure that your engine's rotating assembly is balanced to maintain reliability and performance.
Are there any specific machining requirements for the BC1220-020 pistons?
Yes, the BC1220-020 pistons may require specific bore clearances and ring gap settings as determined by your engine builder. Proper machining is crucial for optimal performance and longevity, so consult with a professional for best practices.
