SB Chrysler 410ci Stock/Edel/Indy Bore 4.040 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.5 Inverted Dome Head 68cc (CP Bullets BM4240-040)
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|
Make |
Chrysler |
|
Engine Type |
SB Chrysler |
|
Part Number |
BM4240-040 |
|
Bore (in) |
4.04 |
|
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 |
9.5 |
|
Pin |
.984 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.295 / -.295 |
|
Cubic Inch |
410 |
|
Piston Weight |
467 |
|
Style |
Inv |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | SB Chrysler 410ci Stock/Edel/Indy Bore 4.040 CH 1.455 Stroke 4.000 Rod 6.123 CR 9.5 Inverted Dome Head 68cc (CP Bullets BM4240-040) |
|---|---|
| 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 BM4240-040 pistons?
For the BM4240-040 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 the best fit.
What is the compression ratio for the BM4240-040 pistons in a 410ci SB Chrysler engine?
The BM4240-040 pistons provide a compression ratio of 9.5:1 when used with 68cc cylinder heads. Ensure that your engine's overall setup, including head gasket thickness and combustion chamber volume, is accounted for to achieve this ratio.
Do I need to modify my cylinder heads for the BM4240-040 pistons?
The BM4240-040 pistons feature two valve reliefs designed for 18-degree heads. Depending on your specific head design and camshaft specifications, additional modifications may be necessary for proper clearance, so check with your engine builder.
What type of rings are included with the BM4240-040 pistons?
The BM4240-040 pistons come with a ring set featuring 1.5mm top and second rings, along with a 3.0mm oil ring. Ensure that the ring gaps are set correctly according to your engine's application and operating conditions.
What is the weight of the BM4240-040 pistons, and how does it affect performance?
The BM4240-040 pistons weigh 467 grams. While this weight is suitable for a performance application, keep in mind that lighter pistons can improve engine response and RPM capability. Always consider the balance of the entire rotating assembly for optimal performance.
