Big Block Chevy -2.9cc Flat Top 4.320 bore 4.250 stroke 6.385 rod, 8.6 to 1 with 118cc head (CP Bullets BBC5010-070)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5010-070 |
|
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 |
FT |
|
Dom/Dish CC |
-2.9 |
|
Compression Ratio |
8.6 |
|
Pin |
.990 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.29 |
|
Cubic Inch |
498 |
|
Piston Weight |
592 |
|
Style |
FT |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy -2.9cc Flat Top 4.320 bore 4.250 stroke 6.385 rod, 8.6 to 1 with 118cc head (CP Bullets BBC5010-070) |
|---|---|
| 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 bore clearance for the BBC5010-070 pistons?
For the BBC5010-070 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, it's essential to verify this with your specific engine build and conditions.
What compression ratio can I expect with the BBC5010-070 pistons and 118cc heads?
The BBC5010-070 pistons are designed to achieve a compression ratio of 8.6:1 when used with 118cc heads. Ensure that your engine's actual compression ratio is verified with the final assembly and any machining done.
What type of ring set is compatible with the BBC5010-070 pistons?
The BBC5010-070 pistons use a ring thickness of 1/16" x 1/16" x 3/16". Make sure to select a ring set that matches these dimensions for optimal performance.
Do I need to machine the piston pin bores for the BBC5010-070 pistons?
Typically, the piston pin bores on the BBC5010-070 pistons should be checked for fitment. Depending on your specific engine and pin choice, some builders may need to hone the bores for a proper fit.
What is the weight of the BBC5010-070 pistons and how does it affect performance?
The BBC5010-070 pistons weigh 592 grams each. While weight can impact engine performance, particularly in terms of reciprocating mass, it is crucial to balance the entire rotating assembly for optimal results.
