Small Block Chevy Dish -24.6cc All 23 Heads 4.030 Bore,3.750 stroke, 5.850 rod 9.1 to 1 comp with a 62cc head (CP Bullets BC1027-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1027-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.48 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.27 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
-0.156 |
|
Dom/Dish CC |
-24.6 |
|
Compression Ratio |
8.4 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
355 |
|
Piston Weight |
440 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Dish -24.6cc All 23 Heads 4.030 Bore,3.750 stroke, 5.850 rod 9.1 to 1 comp with a 62cc head (CP Bullets BC1027-030) |
|---|---|
| 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 BC1027-030 pistons with a 62cc head?
The BC1027-030 pistons are designed to achieve a compression ratio of approximately 9.1:1 when used with a 62cc cylinder head. However, actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What machining considerations should I keep in mind when using these pistons?
When installing the BC1027-030 pistons, ensure that the bore clearance is set correctly according to your engine's specifications. Additionally, check the ring gaps and adjust them based on your specific application and intended RPM range to ensure optimal performance.
Can I use these pistons with any Small Block Chevy head?
The BC1027-030 pistons are compatible with all 23-degree Small Block Chevy heads. However, it's essential to verify that your specific head design and combustion chamber volume align with the intended compression ratio.
What is the weight of the BC1027-030 pistons, and how does it affect performance?
The BC1027-030 pistons weigh 440 grams each. Lighter pistons can improve engine response and reduce reciprocating mass, but it's crucial to balance them with the rest of the rotating assembly to prevent vibration and ensure reliability.
What type of pin is used with the BC1027-030 pistons?
The BC1027-030 pistons use a .927 x 2.500 inch pin. Ensure that your connecting rods are compatible with this pin size for proper fitment.
