Small Block Chevy Flat Top -6cc 20/30 shift 23 Heads 4.020 Bore,3.500 stroke, 6.000 rod 10.1 to 1 comp with a 64cc head - Lefts & Rights (CP Bullets BCR1320-020)
Small Block Chevy Flat Top -6cc 20/30 shift 23 Heads 4.030 Bore,3.500 stroke, 6.000 rod 10.1 to 1 comp with a 64cc head - Lefts & Rights (CP Bullets BCR1320-030)
Small Block Chevy Flat Top -6cc 20/30 shift 23 Heads 4.030 Bore,3.500 stroke, 5.700 rod 10.1 to 1 comp with a 64cc head - Lefts & Rights (CP Bullets BCR1350-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block Bullet Special Race Series |
|
Part Number |
BCR1350-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.55 |
|
Head Type |
All 23 deg heads |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6 |
|
Compression Ratio |
10.1 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.345 / SP |
|
Cubic Inch |
357 |
|
Piston Weight |
455 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Small Block Chevy Flat Top -6cc 20/30 shift 23 Heads 4.030 Bore,3.500 stroke, 5.700 rod 10.1 to 1 comp with a 64cc head - Lefts & Rights (CP Bullets BCR1350-030) |
|---|---|
| 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 BCR1350-030 pistons?
For the BCR1350-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and prevents piston scuffing. Always verify with your specific engine setup.
What type of ring gaps should I use with these pistons?
For the BCR1350-030 pistons, ring gaps should be set according to the intended use and RPM range. A common starting point is 0.004" per inch of bore for the top ring and slightly larger for the second ring. Adjust based on your specific application and boost levels.
Can I use these pistons with any 23-degree cylinder heads?
Yes, the BCR1350-030 pistons are designed to work with all 23-degree cylinder heads. However, ensure that the head's combustion chamber volume and design are compatible with the specified compression ratio of 10.1:1.
What is the maximum RPM these pistons can handle?
While the BCR1350-030 pistons are built for performance applications, the maximum RPM they can handle depends on several factors including engine balance, tuning, and overall build quality. Typically, they are suitable for high-performance applications in the range of 6,500 to 7,500 RPM, but always consult with your engine builder for specifics.
What is the benefit of the gas porting on the BCR1350-030 pistons?
The gas porting on the BCR1350-030 pistons helps improve ring seal by allowing combustion gases to pressurise the ring grooves. This can enhance performance, especially in high-boost applications, by reducing blow-by and increasing efficiency. Ensure proper tuning and clearances to maximise these benefits.
