Chevy 403ci 4.135 Bore 1.125 CH 14:1 CR - Lefts & Rights (CP Bullets BCRE1522-010)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1522-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
3.75 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.125 |
|
Head Type |
23 * Most Heads |
|
Head CC |
64 |
|
Dome / Dish Height |
0.48 |
|
Dom/Dish CC |
11.2 |
|
Compression Ratio |
14.1 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
.043 x .043 x 3.0 |
|
VR Depth |
-.310 / SP |
|
Cubic Inch |
403 |
|
Piston Weight |
508 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy 403ci 4.135 Bore 1.125 CH 14:1 CR - Lefts & Rights (CP Bullets BCRE1522-010) |
|---|---|
| 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 BCRE1522-010 pistons?
For the BCRE1522-010 pistons, a typical bore clearance of 0.0035" to 0.0045" is recommended. This ensures proper thermal expansion and prevents piston scuffing during operation.
What type of fuel is suitable for the 14:1 compression ratio of these pistons?
Due to the high 14:1 compression ratio, these pistons are best suited for high-octane race fuel or E85 to prevent detonation. Proper tuning and fuel quality are critical for reliability.
What are the implications of using gas ported pistons like the BCRE1522-010?
Gas ported pistons improve ring seal and reduce blow-by by allowing combustion gases to pressurise the ring pack. However, they require precise tuning and should be used in high-performance applications where optimal ring performance is essential.
Do I need to modify my cylinder heads for the valve reliefs on these pistons?
The BCRE1522-010 pistons feature two valve reliefs designed to accommodate most aftermarket cylinder heads. However, it's advisable to check valve clearance during assembly to ensure proper fitment, especially with high-lift camshafts.
What is the weight of the BCRE1522-010 pistons, and how does it affect engine balance?
The BCRE1522-010 pistons weigh 508 grams each. When building your engine, it's important to balance the rotating assembly, including these pistons, to minimise vibrations and ensure smooth operation at high RPM.
