Small Block Chevy 23° N20 4.145 bore, 3.875 stroke 6.00 rod, 1.062 ch 11.2cc dome 14.8 cr, 043,043, 3mm rings - Lefts & Rights (CP Bullets BCRE1521-020)
Small Block Chevy 23° N20 4.155 bore, 4.00 stroke 6.00 rod, 1.00 ch 11.2cc dome 14.9 cr, 043,043, 3mm rings - Lefts & Rights (CP Bullets BCRE1520-030)
Small Block Chevy 23° N20 4.145 bore, 4.00 stroke 6.00 rod, 1.00 ch 11.2cc dome 14.8 cr, 043,043, 3mm rings - Lefts & Rights (CP Bullets BCRE1520-020)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1520-020 |
|
Bore (in) |
4.145 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6 |
|
Comp Height |
1 |
|
Head Type |
23 * Most Heads |
|
Head CC |
64 |
|
Dome / Dish Height |
0.48 |
|
Dom/Dish CC |
11.2 |
|
Compression Ratio |
14.8 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
.043 x .043 x 3.0 |
|
VR Depth |
-.310 / SP |
|
Cubic Inch |
432 |
|
Piston Weight |
485 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Small Block Chevy 23° N20 4.145 bore, 4.00 stroke 6.00 rod, 1.00 ch 11.2cc dome 14.8 cr, 043,043, 3mm rings - Lefts & Rights (CP Bullets BCRE1520-020) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 BCRE1520-020 pistons?
For the BCRE1520-020 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for precise measurements.
What compression ratio can I expect with the BCRE1520-020 pistons?
The BCRE1520-020 pistons are designed to achieve a compression ratio of 14.8:1 when used with a 64cc combustion chamber. Ensure that your engine's setup, including head gasket thickness and combustion chamber volume, is accounted for to achieve the desired compression.
Do I need to modify my cylinder heads for valve clearance with these pistons?
Yes, the BCRE1520-020 pistons feature two valve reliefs, but depending on your specific cylinder head design and camshaft profile, additional modifications may be necessary to ensure adequate valve clearance. Always check clearances during assembly.
What type of rings are included with the BCRE1520-020 pistons?
The BCRE1520-020 pistons come with .043" x .043" x 3.0mm rings. Ensure that the ring gaps are set according to your engine's specifications and intended use to optimise performance and reliability.
What is the weight of the BCRE1520-020 pistons, and how does it affect my build?
The BCRE1520-020 pistons weigh 485 grams each. This weight can impact your engine's reciprocating mass, potentially affecting rev response and overall performance. Consider this when designing your engine for specific applications, especially in high RPM scenarios.
