Small Block Chevrolet 378ci All 23deg Dish 4.000 bore 1.125 CH 3.750 stroke 6.000 rod with 64cc head (CP Bullets BC1031-STD)

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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1031-STD |
|
Bore (in) |
4 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
-0.103 |
|
Dom/Dish CC |
-16.2 |
|
Compression Ratio |
9.3 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
377 |
|
Piston Weight |
413 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevrolet 378ci All 23deg Dish 4.000 bore 1.125 CH 3.750 stroke 6.000 rod with 64cc head (CP Bullets BC1031-STD) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 BC1031-STD pistons?
For the BC1031-STD 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 the BC1031-STD pistons in my Small Block Chevrolet?
The BC1031-STD pistons provide a compression ratio of approximately 9.3:1 when used with a 64cc head. Keep in mind that actual compression may vary based on factors like head gasket thickness and combustion chamber modifications.
What is the weight of the BC1031-STD pistons and how does it affect performance?
The BC1031-STD pistons weigh 413 grams each. Lighter pistons can improve engine response and reduce stress on the connecting rods, but ensure that your rotating assembly is balanced to maintain reliability.
Do the BC1031-STD pistons require any specific machining?
Yes, the BC1031-STD pistons may require specific machining for proper fitment, including verifying bore size and ensuring correct ring gap settings. Always consult with your engine builder for precise requirements.
What type of valve reliefs do the BC1031-STD pistons have?
The BC1031-STD pistons feature two valve reliefs. Ensure that your cylinder heads are compatible and that the reliefs are adequate for your camshaft specifications to prevent valve contact.