Big Block Chevy 24.5cc dome 4.530 Bore 4.000 stroke 6.385 rod, 10.8 to 1 with 118cc head (CP Bullets BBC5312-030)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5312-030 |
|
Bore (in) |
4.53 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.385 |
|
Comp Height |
1.4 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
24.5 |
|
Compression Ratio |
10.7 |
|
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 |
683 |
|
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 6.385 rod, 10.8 to 1 with 118cc head (CP Bullets BBC5312-030) |
|---|---|
| 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 BBC5312-030 pistons?
For the BBC5312-030 pistons, a typical bore clearance of 0.0035" to 0.0045" is recommended. However, this may vary based on the specific application and operating conditions, so always consult your engine builder for precise specifications.
What compression ratio can I expect with the BBC5312-030 pistons and 118cc heads?
The BBC5312-030 pistons are designed to achieve a compression ratio of approximately 10.8:1 when used with 118cc cylinder heads. Keep in mind that actual compression can be influenced by factors such as head gasket thickness and combustion chamber volume.
What type of ring set should I use with the BBC5312-030 pistons?
The BBC5312-030 pistons come with a ring thickness of 1/16 x 1/16 x 3/16 inches. It is advisable to use a compatible performance ring set designed for forged pistons to ensure optimal sealing and performance.
Do I need to modify the piston for valve clearance with the BBC5312-030 pistons?
The BBC5312-030 pistons feature a single valve relief with a slant, which is designed to accommodate typical Big Block Chevy valve sizes. However, it's essential to check for adequate clearance with your specific camshaft and valve train setup to avoid interference.
What is the weight of the BBC5312-030 pistons, and how does it affect performance?
The BBC5312-030 pistons weigh 683 grams each. While this weight is typical for performance applications, it's important to balance the entire rotating assembly, as excessive weight can affect engine response and overall performance.
