Chevy 402ci ASCS 4.130 Bore 1.125 CH 8cc Dome Vert Gas Ports - Lefts & Rights (CP Bullets BCRE1221-005)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1221-005 |
|
Bore (in) |
4.13 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
ASCS |
|
Head CC |
64 |
|
Dome / Dish Height |
0.275 |
|
Dom/Dish CC |
8 |
|
Compression Ratio |
13.4 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.0 x 1.0 x 2.0mm |
|
VR Depth |
-.335 / SP |
|
Cubic Inch |
402 |
|
Piston Weight |
456 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy 402ci ASCS 4.130 Bore 1.125 CH 8cc Dome Vert Gas Ports - Lefts & Rights (CP Bullets BCRE1221-005) |
|---|---|
| Brands | CP Carrillo |
| Engine | Chev |
| 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 BCRE1221-005 pistons?
For the BCRE1221-005 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined by the engine builder based on specific application and operating conditions.
What compression ratio can I expect with the BCRE1221-005 pistons?
The BCRE1221-005 pistons yield a compression ratio of approximately 13.4:1 when used with a 64cc head. Keep in mind that actual compression may vary based on head gasket thickness and other factors.
What type of fuel is suitable for the BCRE1221-005 pistons?
Due to the high compression ratio of 13.4:1, these pistons are best suited for high-octane fuels, such as 98 RON or race fuel, to prevent detonation and ensure optimal performance.
Do I need to modify my cylinder head for the BCRE1221-005 pistons?
The BCRE1221-005 pistons feature two valve reliefs, which should accommodate most standard small block Chevrolet cylinder heads. However, it is advisable to check for adequate clearance, especially with aggressive cam profiles.
What is the weight of the BCRE1221-005 pistons and how does it affect performance?
The BCRE1221-005 pistons weigh 456 grams each. While heavier pistons can affect engine response and RPM capability, they are designed for durability in high-performance applications. Balancing the rotating assembly is crucial for optimal performance.
