Big Block Chevy Tall Deck 24.9cc dome 4.500 Bore 4.750 stroke 6.700 rod, 12.8 to 1 with 118cc head (CP Bullets BBC5320-STD)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5320-STD |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4.75 |
|
Rod Length (in) |
6.7 |
|
Comp Height |
1.12 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
24.9 |
|
Compression Ratio |
12.8 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.31 |
|
Cubic Inch |
604 |
|
Piston Weight |
600 |
|
Style |
Dome |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy Tall Deck 24.9cc dome 4.500 Bore 4.750 stroke 6.700 rod, 12.8 to 1 with 118cc head (CP Bullets BBC5320-STD) |
|---|---|
| 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 BBC5320-STD pistons?
For the BBC5320-STD pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined by the engine builder based on specific application and tolerances.
What compression ratio can I expect with the BBC5320-STD pistons and 118cc heads?
The BBC5320-STD pistons are designed to achieve a compression ratio of 12.8:1 when used with 118cc cylinder heads. Ensure that all components are compatible and properly machined to achieve this ratio reliably.
What is the weight of the BBC5320-STD pistons and how does it affect performance?
The BBC5320-STD pistons weigh approximately 600 grams. While this weight is suitable for high-performance applications, consider the overall rotating assembly balance and the impact on engine RPM and response.
Do the BBC5320-STD pistons require any specific machining before installation?
Yes, the BBC5320-STD pistons may require specific machining such as honing of the cylinder bores to achieve the correct clearance. Always consult with your engine builder to ensure proper fitment.
What type of fuel is recommended for an engine using BBC5320-STD pistons?
Due to the high compression ratio of 12.8:1, it is recommended to use high-octane fuel to prevent detonation. The exact fuel requirements can vary based on tuning, boost levels, and specific engine setup.
