Big Block Chevy -3.4cc Flat Top 4.600 Bore 4.750 stroke 6.700 rod, 10.7 to 1 with 118cc head (CP Bullets BBC5321-100)
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|
Make |
Chevrolet |
|
Engine Type |
Big Block |
|
Part Number |
BBC5321-100 |
|
Bore (in) |
4.6 |
|
Stroke (in) |
4.75 |
|
Rod Length (in) |
6.7 |
|
Comp Height |
1.12 |
|
Head Type |
24 OC |
|
Head CC |
118 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-3.4 |
|
Compression Ratio |
10.7 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth |
-0.32 |
|
Cubic Inch |
632 |
|
Piston Weight |
599 |
|
Style |
FT |
|
Valve Reliefs |
1 VR with Slant |
|
Gas Port |
No |
| Product Name | Big Block Chevy -3.4cc Flat Top 4.600 Bore 4.750 stroke 6.700 rod, 10.7 to 1 with 118cc head (CP Bullets BBC5321-100) |
|---|---|
| Brands | CP Carrillo |
| Engine | Big Block Chev |
| Make | GM |
Delivery & Freight
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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 BBC5321-100 pistons?
For the BBC5321-100 pistons, a typical bore clearance is around 0.0030" to 0.0035". However, final clearance should be determined by the engine builder based on specific application and tolerances.
What compression ratio can I expect with the BBC5321-100 pistons and 118cc heads?
The BBC5321-100 pistons provide a compression ratio of 10.7:1 when used with 118cc heads. Ensure that your engine's overall assembly, including head gasket thickness and combustion chamber volume, is accounted for to achieve this ratio.
What type of ring gaps should I set for the BBC5321-100 pistons?
The ring gaps for the BBC5321-100 pistons should be set according to the manufacturer's specifications and the intended use of the engine. Generally, a starting point for gap settings is around 0.004" per inch of bore for the top ring and slightly more for the second ring.
Do I need to machine the pistons for my application?
It's common for the BBC5321-100 pistons to require some machining for optimal fitment, particularly for ring land clearance and to ensure proper piston-to-wall clearance. Always consult with your engine builder for specific machining needs.
What is the weight of the BBC5321-100 pistons and how does it affect performance?
The BBC5321-100 pistons weigh 599 grams. While weight can impact engine performance, especially in terms of reciprocating mass, the design of these pistons aims to balance strength and weight for optimal performance in high-power applications.
