Big Block Chrysler Flat Top -6.77cc All 15 deg Wedge 4.350 Bore , 4.150 stroke, 6.760 rod 10.8 to 1 Comp with 78cc head (CP Bullets BM4010-030)
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|
Make |
Chrysler |
|
Engine Type |
BB Chrysler |
|
Part Number |
BM4010-030 |
|
Bore (in) |
4.35 |
|
Stroke (in) |
4.15 |
|
Rod Length (in) |
6.768 |
|
Comp Height |
1.86 |
|
Head Type |
BB Chry OC/CC |
|
Head CC |
78 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6 |
|
Compression Ratio |
11.2 |
|
Pin |
.990 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-.250 / SP |
|
Cubic Inch |
493 |
|
Piston Weight |
610 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Big Block Chrysler Flat Top -6.77cc All 15 deg Wedge 4.350 Bore , 4.150 stroke, 6.760 rod 10.8 to 1 Comp with 78cc head (CP Bullets BM4010-030) |
|---|---|
| Brands | CP Carrillo |
| Engine | Chrysler |
| Make | Chrysler |
Delivery & Freight
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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 compression ratio for the BM4010-030 pistons?
The BM4010-030 pistons are designed to achieve a compression ratio of approximately 11.2:1 when used with a 78cc cylinder head. Ensure that your engine's specifications align with this ratio for optimal performance.
What machining considerations should I keep in mind when using these pistons?
When installing the BM4010-030 pistons, it's crucial to check bore clearance and set appropriate ring gaps according to your engine's specific requirements. Additionally, ensure that the piston-to-valve clearance is adequate, especially given the two valve reliefs on these pistons.
What is the weight of the BM4010-030 pistons, and how does it affect engine performance?
The BM4010-030 pistons weigh 610 grams each. While this weight is suitable for performance applications, it's important to balance the entire rotating assembly to minimise vibrations and ensure reliable engine operation.
Can I use these pistons with a different stroke or rod length?
The BM4010-030 pistons are specifically designed for a 4.15-inch stroke and a 6.768-inch rod length. Using them with different stroke or rod lengths may lead to improper fitment and could adversely affect engine performance and reliability.
What type of ring set is compatible with the BM4010-030 pistons?
The BM4010-030 pistons require a ring set with dimensions of 1/16 x 1/16 x 3/16 inches. Ensure that the rings are properly gapped and installed to achieve optimal sealing and performance.
