Small Block Chevy Flat Top -6.83cc All 23 Heads 4.040 Bore,3.480 stroke, 5.700 rod 9.8 to 1 comp with a 64cc head (CP Bullets BC1021-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1021-040 |
|
Bore (in) |
4.04 |
|
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 |
357 |
|
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 4.040 Bore,3.480 stroke, 5.700 rod 9.8 to 1 comp with a 64cc head (CP Bullets BC1021-040) |
|---|---|
| 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 compression ratio for the BC1021-040 pistons with a 64cc head?
The BC1021-040 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 that the engine is built to the correct specifications for optimal performance.
What bore and stroke specifications do the BC1021-040 pistons accommodate?
These pistons are designed for a 4.040-inch bore and a 3.480-inch stroke, making them suitable for a Small Block Chevy engine with a 5.700-inch rod length.
What is the weight of the BC1021-040 pistons, and how does it affect engine performance?
The BC1021-040 pistons weigh 452 grams. While lighter pistons can improve engine response and RPM capability, it's essential to balance them with the rest of the rotating assembly to maintain reliability and performance.
Do the BC1021-040 pistons require any specific machining before installation?
Yes, it is crucial to check the bore clearance and ensure proper ring gap settings as per your engine build. Additionally, verify that the small-end of the conrod is honed to the correct size for a proper fit.
What type of valve reliefs do the BC1021-040 pistons feature?
The BC1021-040 pistons come with two valve reliefs, allowing for compatibility with various camshaft profiles while ensuring adequate clearance for valve operation.
