Small Block Chevy 417ci ASCS 4.140 Bore 1.062 CH 13.8:1 CR - Lefts & Rights (CP Bullets BCRE1220-015)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1220-015 |
|
Bore (in) |
4.14 |
|
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 |
13.8 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.0 x 1.0 x 2.0mm |
|
VR Depth |
-.335 / SP |
|
Cubic Inch |
417 |
|
Piston Weight |
443 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevy 417ci ASCS 4.140 Bore 1.062 CH 13.8:1 CR - Lefts & Rights (CP Bullets BCRE1220-015) |
|---|---|
| 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 BCRE1220-015 pistons?
For the BCRE1220-015 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on your specific engine build and application, so always consult with your engine builder for the best fit.
What compression ratio can I expect with the BCRE1220-015 pistons?
The BCRE1220-015 pistons provide a compression ratio of 13.8:1 when used with a 64cc head. Ensure that your engine is properly tuned to handle this level of compression, especially if using high boost or race fuel.
What type of ring gaps should I use with these pistons?
For the BCRE1220-015 pistons, the ring gaps should be set according to the intended use of the engine. A common starting point is 0.020" for the top ring and 0.022" for the second ring, but adjustments may be necessary based on your specific application and RPM range.
Do I need to modify my cylinder head for clearance with these pistons?
The BCRE1220-015 pistons feature two valve reliefs, which should provide adequate clearance for most standard small block Chevy heads. However, it's crucial to check for valve-to-piston clearance during assembly, especially if using aftermarket camshafts or higher lift profiles.
What is the weight of the BCRE1220-015 pistons, and how does it affect my engine?
The BCRE1220-015 pistons weigh 443 grams each. While this weight is typical for performance applications, it's important to balance the entire rotating assembly to minimise vibrations and ensure smooth operation at high RPM.
