Small Block Chevy Flat Top -6.83cc All 23 Heads 4.045 Bore,3.480 stroke, 5.700 rod 9.9 to 1 comp with a 64cc head (CP Bullets BC1021-045)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1021-045 |
|
Bore (in) |
4.045 |
|
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 |
358 |
|
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 4.045 Bore,3.480 stroke, 5.700 rod 9.9 to 1 comp with a 64cc head (CP Bullets BC1021-045) |
|---|---|
| Brands | CP Carrillo |
| 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 BC1021-045 pistons?
For the BC1021-045 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 thermal expansion considerations.
What compression ratio can I expect with the BC1021-045 pistons and a 64cc head?
The BC1021-045 pistons yield a compression ratio of approximately 9.9:1 when used with a 64cc cylinder head. Keep in mind that actual compression may vary based on factors like head gasket thickness and combustion chamber volume.
What type of ring gaps should I set for the BC1021-045 pistons?
For the BC1021-045 pistons, it's advisable to set the top ring gap between 0.018" to 0.022" and the second ring gap between 0.016" to 0.020". Adjustments may be necessary based on your specific application and operating conditions.
What is the piston weight of the BC1021-045 and how does it affect performance?
The BC1021-045 pistons weigh 452 grams. While lighter pistons can improve engine response and RPM potential, ensure that your rotating assembly is balanced properly to maintain reliability and performance.
Are there any specific machining requirements for the BC1021-045 pistons?
Yes, the BC1021-045 pistons may require specific machining for bore clearance and ring groove dimensions. It's crucial to verify these specifications with your engine builder to ensure optimal performance and reliability.
