Small Block Chevy Flat Top -6.83cc All 23 Heads 4.035 Bore,3.480 stroke, 5.700 rod 9.8 to 1 comp with a 64cc head (CP Bullets BC1021-035)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1021-035 |
|
Bore (in) |
4.035 |
|
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 |
356 |
|
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 4.035 Bore,3.480 stroke, 5.700 rod 9.8 to 1 comp with a 64cc head (CP Bullets BC1021-035) |
|---|---|
| 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 BC1021-035 pistons?
The BC1021-035 pistons are designed to achieve a compression ratio of approximately 9.9 to 1 when used with a 64cc cylinder head. However, actual compression will depend on factors such as head gasket thickness and deck height.
What are the specific machining requirements for the BC1021-035 pistons?
When installing the BC1021-035 pistons, ensure that the bore clearance is set correctly according to the engine builder's specifications. Additionally, check that the ring gaps are tailored to the application, especially if the engine will see high RPMs or forced induction.
What is the weight of the BC1021-035 pistons, and how does it affect performance?
The BC1021-035 pistons weigh 452 grams each. While lighter pistons can improve throttle response and reduce reciprocating mass, it's crucial to balance them with the rest of the rotating assembly to maintain engine reliability and performance.
Are there any specific considerations for valve clearance with the BC1021-035 pistons?
The BC1021-035 pistons feature two valve reliefs, which should provide adequate clearance for most 23-degree heads. However, it's essential to check valve-to-piston clearance during assembly, especially if using high-lift camshafts.
What type of pin is used with the BC1021-035 pistons, and what are its dimensions?
The BC1021-035 pistons use a pin with dimensions of .927 inches in diameter and 2.500 inches in length. Ensure that the connecting rods are compatible with these pin specifications for proper fitment.
