SB Chrysler 414ci Stock/Edel/Indy Bore 4.070 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.6 Inverted Dome Head 68 (CP Bullets BM4240-070)
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|
Make |
Chrysler |
|
Engine Type |
SB Chrysler |
|
Part Number |
BM4240-070 |
|
Bore (in) |
4.07 |
|
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 |
416 |
|
Piston Weight |
467 |
|
Style |
Inv |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | SB Chrysler 414ci Stock/Edel/Indy Bore 4.070 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.6 Inverted Dome Head 68 (CP Bullets BM4240-070) |
|---|---|
| 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 BM4240-070 pistons?
For the BM4240-070 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for precise measurements.
What compression ratio can I expect with the BM4240-070 pistons in my SB Chrysler engine?
These pistons provide a compression ratio of 9.6:1 when used with 68cc cylinder heads. Ensure that your engine's overall setup, including head gasket thickness and combustion chamber volume, is taken into account to achieve the desired compression.
What is the weight of the BM4240-070 pistons and how does it affect performance?
The BM4240-070 pistons weigh 467 grams each. While lighter pistons can improve engine response and reduce reciprocating mass, it's essential to balance them with the rest of your rotating assembly to maintain reliability and performance.
Are there specific machining requirements for the BM4240-070 pistons?
Yes, the BM4240-070 pistons may require careful attention to bore sizing and ring gap settings. Ensure that the cylinder bores are honed to the correct size and that the ring gaps are set according to your engine's intended use and RPM range.
What type of valve reliefs do the BM4240-070 pistons have?
The BM4240-070 pistons feature two valve reliefs designed to accommodate typical valve sizes in SB Chrysler applications. Always verify clearance with your specific cylinder heads and camshaft to ensure proper operation.
