Small Block Chevy Dome +5cc All 23 Heads 4.040 Bore,3.500 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1040-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1040-040 |
|
Bore (in) |
4.04 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.25 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
5.1 |
|
Compression Ratio |
11.4 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
359 |
|
Piston Weight |
435 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dome +5cc All 23 Heads 4.040 Bore,3.500 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1040-040) |
|---|---|
| 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 compression ratio can I expect with the BC1040-040 pistons?
The BC1040-040 pistons are designed to achieve a compression ratio of 11.4:1 when used with a 64cc cylinder head. However, actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What is the recommended bore clearance for these pistons?
For the BC1040-040 pistons, a typical bore clearance of 0.0030" to 0.0040" is recommended. This clearance ensures proper thermal expansion and prevents piston scuffing at operating temperatures.
Do I need to modify my cylinder heads for valve clearance with these pistons?
Yes, the BC1040-040 pistons feature two valve reliefs, but it's essential to check for adequate clearance with your specific cylinder heads, especially if they have been modified or if you are using high-lift camshafts.
What type of rings are included with the BC1040-040 pistons?
The BC1040-040 pistons come with a ring pack that includes 1.5mm top and second rings, along with a 3.0mm oil ring. Ensure that the ring gaps are set correctly according to your application for optimal performance.
What is the piston weight of the BC1040-040, and how does it affect my engine build?
The BC1040-040 pistons weigh 435 grams each. This weight is suitable for performance applications, but it's important to consider the overall rotating assembly balance, as heavier pistons may affect engine response and RPM capabilities.
