Small Block Chevy Dome +5cc All 23 Heads 4.040 Bore,3.750 stroke, 6.000 rod 12.2 to 1 comp with a 64cc head (CP Bullets BC1042-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1042-040 |
|
Bore (in) |
4.04 |
|
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 |
12.3 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
385 |
|
Piston Weight |
414 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.040 Bore,3.750 stroke, 6.000 rod 12.2 to 1 comp with a 64cc head (CP Bullets BC1042-040) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 BC1042-040 pistons?
The BC1042-040 pistons are designed to achieve a compression ratio of approximately 12.3:1 when used with a 64cc cylinder head. Ensure that your engine's overall setup, including head gasket thickness and combustion chamber volume, is accounted for to maintain this ratio.
What machining is required for the BC1042-040 pistons?
When installing the BC1042-040 pistons, it's crucial to ensure proper bore clearance and ring gap settings. The pistons should be fitted to a 4.040-inch bore, and the engine builder should check for any necessary honing to achieve the correct fit.
What is the weight of the BC1042-040 pistons and how does it affect performance?
The BC1042-040 pistons weigh 414 grams. This weight can influence engine performance, particularly in terms of reciprocating mass. Lighter pistons can improve throttle response and reduce stress on the engine components, but ensure that your engine is balanced appropriately with the full rotating assembly.
What type of valve reliefs do the BC1042-040 pistons have?
The BC1042-040 pistons feature two valve reliefs, which are designed to accommodate typical camshaft profiles used in Small Block Chevy engines. Always verify that your specific camshaft does not interfere with the piston during operation.
Can the BC1042-040 pistons be used with gas porting?
The BC1042-040 pistons do not come with gas ports. If you require gas porting for your application, you will need to consider alternative piston options or consult with a professional engine builder for modifications.
