Small Block Chevy Flat Top -6cc 20/30 shift 23 Heads 4.020 Bore,3.500 stroke, 5.700 rod 10.1 to 1 comp with a 64cc head - Lefts & Rights (CP Bullets BCR1350-020)
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)
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)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block Bullet Special Race Series |
|
Part Number |
BCR1320-020 |
|
Bore (in) |
4.02 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.25 |
|
Head Type |
All 23 deg heads |
|
Head CC |
64 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6 |
|
Compression Ratio |
10 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.345 / SP |
|
Cubic Inch |
355 |
|
Piston Weight |
406 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | 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) |
|---|---|
| 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 BCR1320-020 pistons?
For the BCR1320-020 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this may vary based on your specific engine build and operating conditions, so it's essential to consult with your engine builder.
What compression ratio can I expect with the BCR1320-020 pistons and 64cc heads?
With the BCR1320-020 pistons and 64cc heads, you can expect a compression ratio of approximately 10.1:1. This is contingent on the actual combustion chamber volume and any machining done to the block or heads.
What type of ring gaps should I set for the BCR1320-020 pistons?
For the BCR1320-020 pistons, ring gaps should be set according to your specific application and usage. A general guideline for performance applications is 0.004" to 0.005" per inch of bore for the top ring and slightly more for the second ring, but always verify with your engine builder.
Are the BCR1320-020 pistons suitable for high RPM applications?
Yes, the BCR1320-020 pistons are designed for performance use and can handle high RPM applications. However, ensure proper clearances, balancing, and tuning to maintain reliability at elevated RPM levels.
What is the pin size for the BCR1320-020 pistons, and what should I consider for fitment?
The BCR1320-020 pistons feature a pin size of .927" x 2.500". When fitting, ensure that the small end of your conrods is honed to the correct size for a proper fit, as variations can occur in manufacturing.
