Big Block Chrysler 4.350 bore, 4.150 stroke, 6.768 rod, 1.860 CH, +8.3 cc dome, 1/16, 1/16, 3/16 ring (CP Bullets BM4002-030)
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|
Make |
Chrysler |
|
Engine Type |
BB Chrysler |
|
Part Number |
BM4002-030 |
|
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 |
0.35 |
|
Dom/Dish CC |
7.3 |
|
Compression Ratio |
12.9 |
|
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 |
638 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Big Block Chrysler 4.350 bore, 4.150 stroke, 6.768 rod, 1.860 CH, +8.3 cc dome, 1/16, 1/16, 3/16 ring (CP Bullets BM4002-030) |
|---|---|
| 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 bore clearance for the BM4002-030 pistons?
For the BM4002-030 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 optimal clearances.
What compression ratio can I expect with the BM4002-030 pistons?
The BM4002-030 pistons are designed to achieve a compression ratio of approximately 12.9:1 when used with a 78cc cylinder head. Keep in mind that actual compression may vary based on head gasket thickness and other factors.
What type of ring gaps should I set for the BM4002-030 pistons?
For the BM4002-030 pistons, it is advisable to set the top ring gap around 0.020" to 0.022" and the second ring gap around 0.018" to 0.020". Adjustments may be necessary based on your specific application and operating conditions.
What is the piston weight of the BM4002-030 and how does it affect performance?
The BM4002-030 pistons weigh 638 grams each. While lighter pistons can improve engine response and reduce rotating mass, it's essential to balance them with the rest of the rotating assembly to maintain reliability and performance.
Do the BM4002-030 pistons require any special machining?
Yes, the BM4002-030 pistons may require specific machining such as honing the cylinder bores to achieve the correct clearance. Always ensure that your engine builder checks the fitment and makes any necessary adjustments during assembly.
