Big Block Chevy -3.4cc Flat Top 4.500 Bore 4.000 stroke 6.135 rod, 8.6 to 1 with 118cc head (CP Bullets BBC5220-STD)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5220-STD |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.135 |
|
Comp Height |
1.645 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-3.4 |
|
Compression Ratio |
8.5 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.31 |
|
Cubic Inch |
509 |
|
Piston Weight |
699 |
|
Style |
FT |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy -3.4cc Flat Top 4.500 Bore 4.000 stroke 6.135 rod, 8.6 to 1 with 118cc head (CP Bullets BBC5220-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 BBC5220-STD pistons?
For the BBC5220-STD pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific application, engine temperature, and intended use.
What compression ratio can I expect with the BBC5220-STD pistons and 118cc heads?
Using the BBC5220-STD pistons with 118cc heads will yield a compression ratio of approximately 8.5:1. This ratio is suitable for moderate performance applications, but ensure to verify with your specific engine setup and fuel type.
Do I need to modify the piston for valve clearance when using the BBC5220-STD?
The BBC5220-STD pistons feature a single valve relief with a slant, which is designed to accommodate typical valve sizes in Big Block Chev engines. However, it's crucial to check for clearance with your specific camshaft and valve train setup to avoid interference.
What is the weight of the BBC5220-STD pistons, and how does it affect performance?
The BBC5220-STD pistons weigh 699 grams each. While this weight is typical for performance applications, lighter pistons can improve engine response and RPM capabilities. Consider your overall rotating assembly balance when selecting piston weight.
What type of rings are compatible with the BBC5220-STD pistons?
The BBC5220-STD pistons are designed to use 1/16 x 1/16 x 3/16 inch rings. Ensure to choose high-quality rings that match your performance goals and are suitable for the intended application.
