Big Block Chevy -2.9cc Flat Top 4.310 bore 4.000 stroke 6.135 rod, 7.9 to 1 with 118cc head (CP Bullets BBC5020-060)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5020-060 |
|
Bore (in) |
4.31 |
|
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 |
-2.94 |
|
Compression Ratio |
8.1 |
|
Pin |
.990 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.29 |
|
Cubic Inch |
460 |
|
Piston Weight |
445 |
|
Style |
FT |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy -2.9cc Flat Top 4.310 bore 4.000 stroke 6.135 rod, 7.9 to 1 with 118cc head (CP Bullets BBC5020-060) |
|---|---|
| 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 bore clearance for the BBC5020-060 pistons?
For the BBC5020-060 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on your specific engine build and operating conditions, so always consult with your engine builder for precise specifications.
What compression ratio can I expect with the BBC5020-060 pistons and 118cc heads?
With the BBC5020-060 pistons and 118cc heads, you can expect a compression ratio of approximately 8.1:1. Keep in mind that this may vary slightly depending on the final assembly and any additional machining done.
What type of ring package is included with the BBC5020-060 pistons?
The BBC5020-060 pistons come with a ring package featuring 1/16" x 1/16" x 3/16" thickness. Ensure proper installation and gap settings as per your engine's requirements.
What is the weight of the BBC5020-060 pistons, and how does it affect my engine?
The BBC5020-060 pistons weigh 445 grams each. This weight is suitable for performance applications, but always consider the overall balance of your rotating assembly to maintain engine reliability and performance.
Are there any specific machining requirements for the BBC5020-060 pistons?
Yes, the BBC5020-060 pistons may require specific machining for the pin bores and ring lands to ensure proper fitment and performance. It is crucial to check clearances and tolerances during assembly, as variations can affect engine performance.
