Small Block Chevy Flat Top -6.83cc All 23 Heads 4.155 Bore,3.875 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1111-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1111-030 |
|
Bore (in) |
4.155 |
|
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 |
11.4 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
420 |
|
Piston Weight |
411 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.155 Bore,3.875 stroke, 6.000 rod 11.4 to 1 comp with a 64cc head (CP Bullets BC1111-030) |
|---|---|
| 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 BC1111-030 pistons?
For the BC1111-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and prevents piston scuffing. Always verify with the specific engine build requirements.
What compression ratio can I expect with these pistons?
The BC1111-030 pistons provide a compression ratio of 11.4:1 when used with a 64cc cylinder head. Ensure that your engine's overall setup, including fuel quality and tuning, can support this compression for optimal performance.
What type of ring gaps should I set for the BC1111-030 pistons?
Ring gaps for the BC1111-030 pistons should be set according to the specific application and intended use. A common starting point is 0.004" per inch of bore for the top rings and slightly larger for the second rings. Adjust based on your engine's boost levels and RPM.
Do I need to machine the piston pin bores for the BC1111-030 pistons?
The piston pin bores of the BC1111-030 pistons may require honing to achieve the correct clearance with your connecting rods. Always check the fitment and clearances during assembly to ensure proper operation.
What is the weight of the BC1111-030 pistons and how does it affect my engine?
The BC1111-030 pistons weigh 411 grams each. This weight is suitable for performance applications, but be mindful of the overall rotating assembly balance. Lighter pistons can improve throttle response, but ensure they are compatible with your engine's design and intended use.
