Small Block Chevrolet 350ci All 23deg 4.045 bore 3.480 stroke 5.700 rod Wissotta Spec Piston (CP Bullets BC1021-045W)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block Chevy Wissotta Spec |
|
Part Number |
BC1021-045W |
|
Bore (in) |
4.045 |
|
Stroke (in) |
3.48 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.56 |
|
Head Type |
All 23 deg |
|
Head CC |
68 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-6.9 |
|
Compression Ratio |
9.8 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.310 / -.310 |
|
Cubic Inch |
358 |
|
Piston Weight |
452 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Chevrolet 350ci All 23deg 4.045 bore 3.480 stroke 5.700 rod Wissotta Spec Piston (CP Bullets BC1021-045W) |
|---|---|
| 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 compression ratio for the BC1021-045W pistons?
The BC1021-045W pistons are designed to achieve a compression ratio of approximately 9.8:1 when used with a 68cc cylinder head. Ensure that your engine's overall setup, including head gasket thickness and combustion chamber volume, is considered for accurate compression calculations.
What are the specific machining requirements for the BC1021-045W pistons?
When installing the BC1021-045W pistons, ensure that the bore clearance is set according to the manufacturer's specifications. Additionally, check the ring gaps and adjust them based on your engine's intended use, as this will affect performance and reliability.
What is the weight of the BC1021-045W pistons, and how does it affect engine performance?
The BC1021-045W pistons weigh 452 grams each. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your engine's balance and overall rotating assembly are properly configured to accommodate this weight.
Are there specific valve reliefs on the BC1021-045W pistons?
Yes, the BC1021-045W pistons feature two valve reliefs. This design is intended to provide clearance for the valves in high-performance applications, but it's essential to verify that your specific cylinder head and camshaft combination will work without interference.
What type of pin is used with the BC1021-045W pistons?
The BC1021-045W pistons use a pin size of .927 inches by 2.500 inches. Ensure that your connecting rods are compatible with this pin size for proper fitment and function.
