Small Block Chevy Flat top -6.83cc All 23 deg Head 4.040 Bore, 3.250 stroke, 5.700 rod 9.6 to 1 comp with a 62cc head (CP Bullets BC1015-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1015-040 |
|
Bore (in) |
4.04 |
|
Stroke (in) |
3.25 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.68 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.8 |
|
Compression Ratio |
9.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
333 |
|
Piston Weight |
473 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat top -6.83cc All 23 deg Head 4.040 Bore, 3.250 stroke, 5.700 rod 9.6 to 1 comp with a 62cc head (CP Bullets BC1015-040) |
|---|---|
| Brands | CP Carrillo |
| Make | GM |
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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 BC1015-040 pistons?
For the BC1015-040 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and reduces the risk of piston scuffing.
What compression ratio can I expect with the BC1015-040 pistons and a 62cc head?
With the BC1015-040 pistons and a 62cc head, you can expect a compression ratio of approximately 9.6:1. However, this can vary based on actual head volume and gasket thickness.
What type of ring gaps should I set for the BC1015-040 pistons?
For the BC1015-040 pistons, ring gaps should be set according to the engine's intended use. A common starting point is 0.004" per inch of bore for the top ring and slightly more for the second ring, but always consult your engine builder for specific recommendations.
What is the piston weight of the BC1015-040 and how does it affect engine performance?
The BC1015-040 pistons weigh 473 grams. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your connecting rods and crankshaft are rated for the intended RPM and power levels.
Are there any specific machining requirements for the BC1015-040 pistons?
Yes, the BC1015-040 pistons may require specific machining for correct fitment, including checking bore size and ensuring proper ring groove dimensions. Always verify clearances with your engine builder to achieve optimal performance.
