Small Block Chevy Flat Top -6.83cc All 23 Heads 4.145 Bore,3.875 stroke, 6.000 rod 11.3 to 1 comp with a 64cc head (CP Bullets BC1111-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1111-020 |
|
Bore (in) |
4.145 |
|
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 |
-7.6 |
|
Compression Ratio |
11.3 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.325 / -.325 |
|
Cubic Inch |
418 |
|
Piston Weight |
412 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.145 Bore,3.875 stroke, 6.000 rod 11.3 to 1 comp with a 64cc head (CP Bullets BC1111-020) |
|---|---|
| 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 BC1111-020 pistons?
For the BC1111-020 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and reduces the risk of piston scuffing.
What compression ratio can I expect with these pistons and a 64cc head?
These pistons are designed to achieve an 11.3:1 compression ratio when used with a 64cc cylinder head. However, actual compression may vary based on factors like head gasket thickness and deck height.
Do I need to modify my engine for valve clearance with these pistons?
Yes, the BC1111-020 pistons feature two valve reliefs, but you should always check for adequate valve clearance during assembly, especially if using high-lift camshafts or modified cylinder heads.
What is the weight of the BC1111-020 pistons, and how does it affect performance?
The BC1111-020 pistons weigh 412 grams. Lighter pistons can improve engine response and RPM potential, but ensure your engine's rotating assembly is balanced to maintain reliability.
What type of rings are compatible with the BC1111-020 pistons?
These pistons come with a ring thickness of 1.5 x 1.5 x 3.0mm. Ensure you use compatible rings designed for performance applications to maintain optimal sealing and reduce wear.
