Big Block Chevy 24.5cc dome 4.530 Bore 4.000 stroke 6.135 rod, 10.8 to 1 with 118cc head (CP Bullets BBC5311-030)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5311-030 |
|
Bore (in) |
4.53 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.135 |
|
Comp Height |
1.645 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
24.5 |
|
Compression Ratio |
10.8 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.31 |
|
Cubic Inch |
516 |
|
Piston Weight |
722 |
|
Style |
Dome |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy 24.5cc dome 4.530 Bore 4.000 stroke 6.135 rod, 10.8 to 1 with 118cc head (CP Bullets BBC5311-030) |
|---|---|
| Brands | CP Carrillo |
| Engine | Big Block Chev |
| 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 BBC5311-030 pistons?
For the BBC5311-030 pistons, a typical bore clearance of 0.0035" to 0.0045" is recommended. This ensures proper thermal expansion and prevents piston scuffing during operation. Always confirm with your engine builder for specific requirements.
What compression ratio can I expect with these pistons and a 118cc head?
The BBC5311-030 pistons are designed to achieve a compression ratio of 10.8:1 when used with a 118cc cylinder head. However, actual compression may vary based on factors like head gasket thickness and combustion chamber modifications.
What type of valve reliefs do the BBC5311-030 pistons have?
The BBC5311-030 pistons feature one valve relief with a slant design. This allows for better clearance with the valves, especially in high-performance applications. Always check your specific valve lift and timing to ensure compatibility.
What is the piston weight of the BBC5311-030 and how does it affect performance?
The BBC5311-030 pistons weigh 722 grams each. While heavier pistons can provide durability, they may also affect engine responsiveness and revving characteristics. Balancing the rotating assembly is crucial to mitigate any negative effects on performance.
Are there any specific machining requirements for the BBC5311-030 pistons?
Yes, the BBC5311-030 pistons may require specific machining for optimal fitment, including checking and possibly honing the bore for correct clearance. Additionally, ensure the ring grooves are properly sized and the piston skirts are adequately finished for smooth operation.
