SB Chrysler 414ci Stock/Edel/Indy Bore 4.060 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.6 Inverted Dome Head 68 (CP Bullets BM4240-060)

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|
Make |
Chrysler |
|
Engine Type |
SB Chrysler |
|
Part Number |
BM4240-060 |
|
Bore (in) |
4.06 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.123 |
|
Comp Height |
1.455 |
|
Head Type |
All 18 deg |
|
Head CC |
68 |
|
Dome / Dish Height |
-0.1 |
|
Dom/Dish CC |
-17.8 |
|
Compression Ratio |
9.6 |
|
Pin |
.984 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.295 / -.295 |
|
Cubic Inch |
414 |
|
Piston Weight |
467 |
|
Style |
Inv |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | SB Chrysler 414ci Stock/Edel/Indy Bore 4.060 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.6 Inverted Dome Head 68 (CP Bullets BM4240-060) |
|---|---|
| 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 BM4240-060 pistons?
For the BM4240-060 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 specific application and operating conditions.
What is the compression ratio of the BM4240-060 pistons and how does it affect performance?
The BM4240-060 pistons have a compression ratio of 9.6:1. This ratio is suitable for a balance of performance and reliability, but tuning and fuel quality will significantly impact the engine's overall performance.
What type of ring gaps should I set for the BM4240-060 pistons?
For the BM4240-060 pistons, the top ring gap should typically be set around 0.020" to 0.022", while the second ring gap can be set at approximately 0.018" to 0.020". Always verify with the specific application and consider the engine's intended use.
What is the weight of the BM4240-060 pistons and how does it impact engine balance?
The BM4240-060 pistons weigh 467 grams. It's essential to balance the rotating assembly, including these pistons, to minimise vibrations and ensure smooth operation, especially at high RPM.
Are the BM4240-060 pistons suitable for high-performance applications?
Yes, the BM4240-060 pistons are designed for high-performance applications, particularly in small block Chrysler engines. However, reliability and performance will depend on proper machining, clearances, and tuning tailored to the specific engine setup.