Chevrolet BBC 454 Inverted Dome 555, Bore 4.560, CH 1.270, Stroke 4.250, Rod 6.385 (CP Pistons S5113)
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|
Make |
Chevrolet |
|
Engine Type |
BBC 454 Inverted Dome |
|
Part Number |
S5113 |
|
Bore (in) |
4.56 |
|
Stroke (in) |
4.25 |
|
Rod Length (in) |
6.385 |
|
Comp Height |
1.27 |
|
Dome / Dish Height |
-0.12 |
|
Dom/Dish CC |
-20 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth Int/Exh |
-0.32 |
|
Piston Weight |
633 |
|
Gas Port |
No |
|
Capacity |
555 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
Suitable for nitrous oxide systems (NOS); Suitable for supercharged or turbo; Wrist pins and pin-fitting included at no cost; Accumulator groove included; Double pin oilers, force fed from oil ring; Balanced to +/- 1 gram; Radius valve reliefs; Generous valve relief depths allow for high lift; Pick lock grooves for easy lock removal; Suitable for angle milled heads; Fully CNC machined. Notes: B – Supplied with Double Spiral Locks, D – Rail Support included, O – Made for 10.200 Block Height, P – 9.2 Deck Height, Q – Also fits 4.000 Stroke and 6.385 Rod, R – Can be used with 4.500 Stroke and 10.180 block with 6.535 Rod, S – Supplied with .150 Wall (151g) or optional .180 Wall (175g).
| Product Name | Chevrolet BBC 454 Inverted Dome 555, Bore 4.560, CH 1.270, Stroke 4.250, Rod 6.385 (CP Pistons S5113) |
|---|---|
| Brands | CP Carrillo |
| Engine | Big Block 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 are the recommended machining requirements for the S5113 pistons?
The S5113 pistons are designed for a 4.560 bore and may require specific machining to achieve the correct bore clearance. Ensure that the cylinder bores are honed to match the piston specifications, and check ring gaps according to your application. It's crucial to follow the manufacturer's guidelines for optimal performance.
Can the S5113 pistons be used with nitrous or forced induction?
Yes, the S5113 pistons are suitable for use with nitrous oxide systems, as well as supercharged or turbocharged applications. However, the reliability and performance will depend on proper tuning, fuel quality, and overall engine setup. Ensure that you account for the increased stress on components when using forced induction.
What is the weight of the S5113 pistons and how does it affect performance?
The S5113 pistons weigh 633 grams. While this weight is typical for performance applications, it is important to balance the entire rotating assembly, including the crankshaft and conrods, to minimise vibrations and ensure smooth operation at high RPMs.
What type of wrist pins are included with the S5113 pistons?
The S5113 pistons come with .990 x 2.930 wrist pins included at no additional cost. Ensure that the pin fitting is done correctly to maintain proper clearances and prevent any potential issues during operation.
What is the significance of the -20cc dome/dish volume on the S5113 pistons?
The -20cc dome/dish volume indicates that these pistons have a negative volume, which contributes to the overall compression ratio of the engine. This is particularly important for high-performance applications, as it allows for better combustion efficiency. Be sure to calculate the final compression ratio considering the cylinder head and gasket specifications.
