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SB Chrysler 410ci Inverted Dome Head 68cc specifications

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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SB Chrysler 414ci Inverted Dome Head 68cc specifications

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)

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)

These Pistons are not held in stock in Australia. We ship every Friday from CP Carrillo so please allow up to 2 weeks for delivery to you.
AUD$1,495.45
In stock
SKU
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

More Information
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

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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.