Small Block Chevy Dome +5cc All 23 Heads 4.155 Bore,3.875 stroke, 6.000 rod 13.2 to 1 comp with a 64cc head (CP Bullets BC1220-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1220-030 |
|
Bore (in) |
4.155 |
|
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 |
13.2 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
420 |
|
Piston Weight |
438 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.155 Bore,3.875 stroke, 6.000 rod 13.2 to 1 comp with a 64cc head (CP Bullets BC1220-030) |
|---|---|
| Brands | CP Carrillo |
| Make | GM |
Delivery & Freight
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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 BC1220-030 pistons?
The BC1220-030 pistons are designed to achieve a compression ratio of 13.2:1 when used with a 64cc cylinder head. Ensure that your engine is properly tuned to handle this high compression for optimal performance.
What bore and stroke specifications are compatible with the BC1220-030 pistons?
These pistons are designed for a bore of 4.155 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 type of valve reliefs do the BC1220-030 pistons have?
The BC1220-030 pistons feature two valve reliefs, which help accommodate the valve clearance needed for high-performance applications. Ensure your cylinder heads are compatible with this design.
What is the weight of the BC1220-030 pistons?
Each BC1220-030 piston weighs 438 grams. It's important to consider this weight when balancing your rotating assembly to ensure smooth operation at high RPMs.
What ring thickness is specified for the BC1220-030 pistons?
The BC1220-030 pistons use a ring thickness of 1.5mm for the top and second rings, and 3.0mm for the oil control ring. Proper ring gap settings should be determined by your engine builder based on application.
