Small Block Chevy Dome +5cc All 23 Heads 4.020 Bore,3.750 strok, 6.000 rod 12.1 to 1 comp with a 64cc head (CP Bullets BC1042-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1042-020 |
|
Bore (in) |
4.02 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
12.2 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
381 |
|
Piston Weight |
408 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.020 Bore,3.750 strok, 6.000 rod 12.1 to 1 comp with a 64cc head (CP Bullets BC1042-020) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 BC1042-020 pistons?
The BC1042-020 pistons are designed to achieve a compression ratio of approximately 12.1:1 when used with a 64cc cylinder head. However, actual compression will depend on factors such as head gasket thickness and combustion chamber volume.
What bore size is required for the BC1042-020 pistons?
The BC1042-020 pistons are designed for a bore size of 4.020 inches. Ensure that your engine block is machined to this specification for proper fitment.
What type of valve reliefs do the BC1042-020 pistons have?
The BC1042-020 pistons feature two valve reliefs, which are designed to provide clearance for the valves in a Small Block Chevy engine. Ensure that your camshaft profile is compatible with these reliefs.
What is the weight of the BC1042-020 pistons?
Each BC1042-020 piston weighs approximately 408 grams. This weight should be considered when balancing the rotating assembly for optimal engine performance.
What is the pin size for the BC1042-020 pistons?
The BC1042-020 pistons use a pin size of .927 inches with a length of 2.500 inches. Ensure that your connecting rods are compatible with this pin specification.
