Small Block Chevy All 23 Heads 4.020 Bore,3.750 stroke, 5.700 rod 1.425 CH +5cc Dome 1.5mm, 1.5mm, 3mm rings (CP Bullets BC1046-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1046-020 |
|
Bore (in) |
4.02 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.425 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
11.7 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
381 |
|
Piston Weight |
457 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy All 23 Heads 4.020 Bore,3.750 stroke, 5.700 rod 1.425 CH +5cc Dome 1.5mm, 1.5mm, 3mm rings (CP Bullets BC1046-020) |
|---|---|
| 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 bore clearance for the BC1046-020 pistons?
For the BC1046-020 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and prevents piston slap during operation. Always confirm with your engine builder for specific requirements based on your application.
What compression ratio can I expect with the BC1046-020 pistons?
The BC1046-020 pistons are designed to achieve a compression ratio of approximately 11.7:1 when used with a 64cc cylinder head. However, actual compression may vary based on head gasket thickness and combustion chamber modifications, so verify with your engine setup.
What type of valve reliefs do the BC1046-020 pistons have?
The BC1046-020 pistons feature two valve reliefs, which are designed to accommodate typical camshaft profiles used in Small Block Chevy applications. Ensure that your camshaft and valve timing are compatible to avoid interference.
What is the piston weight of the BC1046-020, and how does it affect performance?
The BC1046-020 pistons weigh 457 grams. This weight is suitable for high-performance applications, providing a good balance between strength and reciprocating mass. Lighter pistons can improve throttle response and RPM capabilities, but ensure your connecting rods and crankshaft are rated for the intended use.
Are there any specific machining requirements for the BC1046-020 pistons?
Yes, the BC1046-020 pistons may require specific machining for optimal fitment. Ensure that the piston skirts are correctly honed to match your bore size, and check ring lands for proper clearance. Always consult with your engine builder for precise machining needs.
