Small Block Chrysler Inv Dish -18cc EQ Magnum 4.030 bore, 3.580 stroke, 6.123 rod 9.0 to 1 Comp with 62cc head (CP Bullets BMR4200-030)
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|
Make |
Chrysler |
|
Engine Type |
SB Chrysler |
|
Part Number |
BMR4200-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.58 |
|
Rod Length (in) |
6.123 |
|
Comp Height |
1.645 |
|
Head Type |
EQ Magnum |
|
Head CC |
62 |
|
Dome / Dish Height |
-0.117 |
|
Dom/Dish CC |
-18 |
|
Compression Ratio |
9.1 |
|
Pin |
.984 x 2.500 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.250 / -.250 |
|
Cubic Inch |
365 |
|
Piston Weight |
472 |
|
Style |
Inv |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chrysler Inv Dish -18cc EQ Magnum 4.030 bore, 3.580 stroke, 6.123 rod 9.0 to 1 Comp with 62cc head (CP Bullets BMR4200-030) |
|---|---|
| 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 BMR4200-030 pistons?
For the BMR4200-030 pistons, a typical bore clearance is around 0.0030" to 0.0035". However, this can vary based on the specific application and the builder's preferences. Always consult your engine builder for the best fitment.
What compression ratio can I expect with the BMR4200-030 pistons and a 62cc head?
The BMR4200-030 pistons are designed to achieve a compression ratio of approximately 9.1:1 when used with a 62cc EQ Magnum head. However, actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What is the weight of the BMR4200-030 pistons and how does it affect performance?
The BMR4200-030 pistons weigh 472 grams each. While this weight is suitable for performance applications, keep in mind that lighter pistons can improve engine response and reduce stress on the rotating assembly. Balancing the entire rotating assembly is crucial for optimal performance.
Do the BMR4200-030 pistons require any special machining?
Yes, the BMR4200-030 pistons may require specific machining for proper fitment, including honing of the cylinder bores to achieve the correct clearance. Additionally, ensure that the ring lands are properly prepared and that the piston-to-wall clearance is within recommended specifications.
What type of ring package is compatible with the BMR4200-030 pistons?
The BMR4200-030 pistons are designed to work with a 1.2 x 1.2 x 3.0mm ring package. Ensure that the rings are properly gapped and installed according to your engine's specifications for optimal performance and longevity.
