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SBC 350 Wissotta Spec flat top piston detail view

SBC, 350, Wissotta Spec, Flat top, 4.040 bore, 1.560 CH, 3.480 stroke, 5.700 Rod, -6.8cc (CP Bullets BC1021-040W)

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SBC, 350, Wissotta Spec, Flat top, 4.060 bore, 1.560 CH, 3.480 stroke, 5.700 Rod, -6.8cc (CP Bullets BC1021-060W)

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$1,404.55
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SKU
BC1021-060W
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Make

Chevrolet

Engine Type

Small Block Chevy Wissotta Spec

Part Number

BC1021-060W

Bore (in)

4.06

Stroke (in)

3.48

Rod Length (in)

5.7

Comp Height

1.56

Head Type

All 23 deg

Head CC

68

Dome / Dish Height

FT

Dom/Dish CC

-6.9

Compression Ratio

9.8

Pin

.927 x 2.500

Ring Thickness

1.5 x 1.5 x 3.0mm

VR Depth

-.310 / -.310

Cubic Inch

360

Piston Weight

452

Style

FT

Valve Reliefs

2 VR's

Gas Port

No

More Information
Product Name SBC, 350, Wissotta Spec, Flat top, 4.060 bore, 1.560 CH, 3.480 stroke, 5.700 Rod, -6.8cc (CP Bullets BC1021-060W)
Brands CP Carrillo
Engine Chev
Make GM

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 BC1021-060W pistons?

For the BC1021-060W pistons, a typical bore clearance of 0.0030" to 0.0040" is recommended. However, this can vary based on your specific application and operating conditions, so always consult with your engine builder for precise measurements.

What compression ratio can I expect with the BC1021-060W pistons?

The BC1021-060W pistons provide a compression ratio of approximately 9.8:1 when used with 68cc cylinder heads. Ensure that your complete engine setup, including head gasket thickness and combustion chamber volume, is considered for accurate compression calculations.

What type of ring gaps should I set for the BC1021-060W pistons?

For the BC1021-060W pistons, ring gaps should typically be set according to the manufacturer's specifications and the intended use of the engine. A common starting point is 0.004" per inch of bore for the top rings and slightly more for the second rings, but always verify with your engine builder based on your specific application.

What is the weight of the BC1021-060W pistons and how does it affect performance?

The BC1021-060W pistons weigh 452 grams each. Lighter pistons can improve engine response and reduce inertia, but it's essential to balance them with the rest of the rotating assembly to maintain reliability and performance.

Are there any specific machining requirements for the BC1021-060W pistons?

Yes, the BC1021-060W pistons may require specific machining for proper fitment, including honing of the cylinder bores to achieve the correct clearance. Always consult with your engine builder to ensure the pistons are installed correctly and to the required specifications.

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