Small Block Chevy Flat Top -6.83cc All 23 Heads 4.165 Bore,3.875 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1111-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1111-040 |
|
Bore (in) |
4.165 |
|
Stroke (in) |
3.875 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.062 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.8 |
|
Compression Ratio |
11.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
422 |
|
Piston Weight |
416 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.165 Bore,3.875 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1111-040) |
|---|---|
| Brands | CP Carrillo |
| 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 bore clearance for the BC1111-040 pistons?
For the BC1111-040 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on your specific engine build and operating conditions, so always consult your engine builder for precise specifications.
What compression ratio can I expect with these pistons and a 64cc head?
These pistons are designed to achieve a compression ratio of approximately 11.4:1 when used with a 64cc cylinder head. Keep in mind that actual compression can be influenced by factors such as head gasket thickness and combustion chamber modifications.
Do I need to machine the piston for valve reliefs?
The BC1111-040 pistons come with two valve reliefs, which should accommodate most common camshaft profiles in Small Block Chevy applications. However, it's essential to verify clearance with your specific setup, especially if using a high-lift cam.
What is the weight of the BC1111-040 pistons, and how does it affect my engine?
The BC1111-040 pistons weigh 416 grams each. This weight is suitable for performance applications, but be aware that lighter pistons can improve engine response and reduce stress on the rotating assembly. Always balance the entire rotating assembly for optimal performance.
What type of rings should I use with these pistons?
The BC1111-040 pistons are designed to work with 1.5mm x 1.5mm x 3.0mm rings. Ensure you select high-quality performance rings that match the intended use of your engine, whether it's for street or race applications.
