Chevy 400ci All 23° 4.125 Bore 1.270 CH -27.2cc Dish (CP Bullets BC1122-STD)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BC1122-STD |
|
Bore (in) |
4.125 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
5.85 |
|
Comp Height |
1.27 |
|
Head Type |
All 23 deg |
|
Head CC |
64 |
|
Dome / Dish Height |
-0.18 |
|
Dom/Dish CC |
-27.2 |
|
Compression Ratio |
9.1 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
401 |
|
Piston Weight |
468 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy 400ci All 23° 4.125 Bore 1.270 CH -27.2cc Dish (CP Bullets BC1122-STD) |
|---|---|
| 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 BC1122-STD pistons?
For the BC1122-STD 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 always consult your engine builder for the best fit.
What compression ratio can I expect with the BC1122-STD pistons?
The BC1122-STD pistons are designed to achieve a compression ratio of approximately 9.1:1 when used with 64cc cylinder heads. Keep in mind that actual compression may vary based on head gasket thickness and other factors.
Do I need to machine the piston skirts for my application?
Depending on your engine's specific requirements, you may need to perform some machining on the piston skirts for optimal clearance and fitment. It's essential to check the fitment with your block and ensure proper clearances are maintained.
What type of ring set is compatible with the BC1122-STD pistons?
The BC1122-STD pistons come with a ring thickness of 1.5 x 1.5 x 3.0mm. Ensure you select a compatible ring set that matches these dimensions for proper sealing and performance.
What is the weight of the BC1122-STD pistons, and how does it affect performance?
The BC1122-STD pistons weigh 468 grams each. This weight is suitable for performance applications, but keep in mind that lighter pistons can improve engine response and reduce reciprocating mass, which may enhance overall performance.
