Small Block Chevy Flat Top -6.83cc All 23 Heads 4.060 Bore,3.480 stroke, 5.700 rod 9.9 to 1 comp with a 64cc head (CP Bullets BC1021-060)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1021-060 |
|
Bore (in) |
4.06 |
|
Stroke (in) |
3.48 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.56 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.9 |
|
Compression Ratio |
9.9 |
|
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 |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.060 Bore,3.480 stroke, 5.700 rod 9.9 to 1 comp with a 64cc head (CP Bullets BC1021-060) |
|---|---|
| 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 BC1021-060 pistons?
For the BC1021-060 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and intended use.
What compression ratio can I expect with these pistons and a 64cc head?
These pistons are designed to achieve a compression ratio of approximately 9.9:1 when used with a 64cc cylinder head. Ensure that all components are compatible and properly machined to achieve this ratio.
What type of ring gaps should I set for the BC1021-060 pistons?
Ring gaps should 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.
Are there any specific machining requirements for these pistons?
Yes, the BC1021-060 pistons may require the cylinder bores to be honed to achieve the correct clearance. Additionally, ensure that the piston pin bores are checked for proper fitment and alignment.
What is the weight of the BC1021-060 pistons and how does it affect my engine?
The BC1021-060 pistons weigh 452 grams each. 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.
