Big Block Chevy 24.5cc dome 4.560 Bore 4.000 stroke 6.135 rod, 10.9 to 1 with 118cc head (CP Bullets BBC5311-060)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5311-060 |
|
Bore (in) |
4.56 |
|
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 |
523 |
|
Piston Weight |
738 |
|
Style |
Dome |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy 24.5cc dome 4.560 Bore 4.000 stroke 6.135 rod, 10.9 to 1 with 118cc head (CP Bullets BBC5311-060) |
|---|---|
| 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 BBC5311-060 pistons?
The BBC5311-060 pistons are designed to achieve a compression ratio of approximately 10.9 to 1 when used with a 118cc cylinder head. Ensure that your engine's specific setup, including head gasket thickness and combustion chamber volume, is accounted for to confirm this ratio.
What bore and stroke specifications are compatible with these pistons?
These pistons are designed for a 4.560-inch bore and a 4.000-inch stroke. It's crucial to ensure your engine block is machined to these specifications for optimal performance and fitment.
What type of valve reliefs do the BBC5311-060 pistons feature?
The BBC5311-060 pistons come with one valve relief that has a slant design. This is intended to provide clearance for the valves while maintaining the integrity of the piston dome.
What is the weight of the BBC5311-060 pistons and how does it affect performance?
Each BBC5311-060 piston weighs 738 grams. While this weight is typical for performance applications, it's important to consider the overall rotating assembly balance and the impact on engine RPM and performance characteristics.
Are there any specific machining requirements for the BBC5311-060 pistons?
Yes, proper bore clearance must be established for these pistons, along with setting the ring gaps according to your engine's specifications. Always consult with your engine builder to ensure these parameters are correctly addressed for optimal performance.
