Small Block Chevy USMTS 4.155 Bore, Stroke 3.875, 6.00 rod, 1.062 CH Vert Gas Ports 14:1 CR 1mm,1mm, 2mm rings - Lefts & Rights (CP Bullets BCRE1220-030)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1220-030 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
3.875 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.062 |
|
Head Type |
ASCS |
|
Head CC |
64 |
|
Dome / Dish Height |
0.275 |
|
Dom/Dish CC |
8 |
|
Compression Ratio |
14 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.0 x 1.0 x 2.0mm |
|
VR Depth |
-.335 / SP |
|
Cubic Inch |
420 |
|
Piston Weight |
448 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy USMTS 4.155 Bore, Stroke 3.875, 6.00 rod, 1.062 CH Vert Gas Ports 14:1 CR 1mm,1mm, 2mm rings - Lefts & Rights (CP Bullets BCRE1220-030) |
|---|---|
| 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 BCRE1220-030 pistons?
For the BCRE1220-030 pistons, a typical bore clearance of 0.0035" to 0.0045" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for precise specifications.
What compression ratio can I expect with the BCRE1220-030 pistons?
The BCRE1220-030 pistons are designed for a compression ratio of 14:1 when used with a 64cc head. Ensure that your engine's setup, including fuel quality and tuning, is suitable for high compression applications to maintain reliability.
What type of ring gaps should I set for the BCRE1220-030 pistons?
For the BCRE1220-030 pistons, a common starting point for ring gaps is 0.004" per inch of bore for the top rings and 0.005" per inch for the second rings. Adjustments may be necessary based on your specific application and operating conditions.
What is the weight of the BCRE1220-030 pistons, and how does it affect performance?
The BCRE1220-030 pistons weigh 448 grams each. While lighter pistons can improve engine response and reduce reciprocating mass, it's important to balance them with the rest of the rotating assembly to maintain engine harmony and reliability.
Are the BCRE1220-030 pistons suitable for high RPM applications?
Yes, the BCRE1220-030 pistons are designed for high-performance applications, making them suitable for high RPM use. However, ensure that your engine is properly built and tuned to handle the increased stresses associated with high RPM operation.
