Big Block Chevy 24.40cc Dome 4.320 Bore 4.250 stroke 6.385 rod, 10.6 to 1 with 118cc head (CP Bullets BBC5110-070)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5110-070 |
|
Bore (in) |
4.32 |
|
Stroke (in) |
4.25 |
|
Rod Length (in) |
6.385 |
|
Comp Height |
1.275 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
24.4 |
|
Compression Ratio |
10.5 |
|
Pin |
.990 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.295 |
|
Cubic Inch |
498 |
|
Piston Weight |
598 |
|
Style |
Dome |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy 24.40cc Dome 4.320 Bore 4.250 stroke 6.385 rod, 10.6 to 1 with 118cc head (CP Bullets BBC5110-070) |
|---|---|
| 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 compression ratio for the BBC5110-070 pistons?
The BBC5110-070 pistons are designed to achieve a compression ratio of approximately 10.5 to 1 when used with a 118cc cylinder head. However, actual compression can vary based on factors such as head gasket thickness and combustion chamber modifications.
What are the specific machining requirements for the BBC5110-070 pistons?
When installing the BBC5110-070 pistons, ensure that the bore clearance is set correctly, typically around 0.0035" to 0.0045". Additionally, ring gaps should be tailored to your specific application, particularly if running high RPM or boost.
What is the weight of the BBC5110-070 pistons and how does it affect performance?
The BBC5110-070 pistons weigh 598 grams each. While this weight is suitable for performance applications, it's crucial to balance the entire rotating assembly to minimise vibrations and ensure optimal engine performance.
What type of valve reliefs do the BBC5110-070 pistons have?
The BBC5110-070 pistons feature a single valve relief with a slant design. This is intended to provide clearance for the valves while maintaining strength in the piston structure.
How does the dome height of the BBC5110-070 pistons affect combustion?
The dome height of 0.25 inches on the BBC5110-070 pistons contributes to the overall compression ratio and combustion characteristics. It is important to consider this when tuning the engine for optimal performance and fuel efficiency.
