Big Block Chevy 24.35cc Dome 4.280 Bore 4.000 stroke 6.135 rod, 9.5 to 1 with 118cc head (CP Bullets BBC5111-030)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5111-030 |
|
Bore (in) |
4.28 |
|
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 |
24.3 |
|
Compression Ratio |
9.8 |
|
Pin |
.990 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.295 |
|
Cubic Inch |
460 |
|
Piston Weight |
655 |
|
Style |
Dome |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy 24.35cc Dome 4.280 Bore 4.000 stroke 6.135 rod, 9.5 to 1 with 118cc head (CP Bullets BBC5111-030) |
|---|---|
| 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 BBC5111-030 pistons?
For the BBC5111-030 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 the specific application and operating conditions.
What compression ratio can I expect with the BBC5111-030 pistons and 118cc heads?
The BBC5111-030 pistons are designed to achieve a compression ratio of approximately 9.8:1 when used with 118cc cylinder heads. Ensure that all components are correctly matched and that the engine is properly tuned for optimal performance.
What type of ring gaps should I use for the BBC5111-030 pistons?
The ring gaps for the BBC5111-030 pistons should be set according to the manufacturer's specifications and the intended use of the engine. Generally, a gap of 0.004" to 0.005" per inch of bore is a good starting point, but adjustments may be necessary based on specific conditions.
Do I need to machine the piston domes for my application?
Machining the piston domes may be necessary depending on your specific engine setup and desired compression ratio. It's important to consult with your engine builder to determine if any modifications are required for optimal performance.
What is the weight of the BBC5111-030 piston and how does it affect performance?
The BBC5111-030 piston weighs 655 grams. While lighter pistons can improve engine response and reduce stress on components, it's essential to balance the entire rotating assembly for optimal performance and reliability.
