Small Block Chevy Flat Top -6.83cc All 23 Heads 4.020 Bore,3.750 stroke, 6.000 rod 10.4 to 1 comp with a 64cc head (CP Bullets BC1025-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1025-020 |
|
Bore (in) |
4.02 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.8 |
|
Compression Ratio |
10.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
381 |
|
Piston Weight |
393 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy Flat Top -6.83cc All 23 Heads 4.020 Bore,3.750 stroke, 6.000 rod 10.4 to 1 comp with a 64cc head (CP Bullets BC1025-020) |
|---|---|
| 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 BC1025-020 pistons?
For the BC1025-020 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, always consult with your engine builder for specific requirements based on your application and tolerances.
What compression ratio can I expect with the BC1025-020 pistons and a 64cc head?
The BC1025-020 pistons are designed to achieve a compression ratio of approximately 10.4:1 when used with a 64cc cylinder head. Ensure that your entire engine setup, including camshaft and fuel type, is compatible with this compression ratio.
What is the weight of the BC1025-020 pistons, and how does it affect performance?
The BC1025-020 pistons weigh 393 grams each. Lighter pistons can improve engine response and reduce reciprocating mass, but it's essential to balance them with the rest of the rotating assembly for optimal performance.
Do the BC1025-020 pistons require any specific machining before installation?
Yes, the BC1025-020 pistons may require specific machining such as honing of the cylinder bores to achieve the correct clearance. Always verify with your engine builder to ensure proper fitment and performance.
What type of ring set is compatible with the BC1025-020 pistons?
The BC1025-020 pistons are designed to work with a ring set that includes 1.5mm top and second rings, along with a 3.0mm oil control ring. Ensure that the ring gaps are set according to your engine's specifications for optimal performance.
