Chevrolet BBC 454 Dome 540, Bore 4.500, CH 1.270, Stroke 4.250, Rod 6.385 (CP Pistons S5220)
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|
Make |
Chevrolet |
|
Engine Type |
BBC 454 Dome |
|
Part Number |
S5220 |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4.25 |
|
Rod Length (in) |
6.385 |
|
Comp Height |
1.27 |
|
Dome / Dish Height |
0.525 |
|
Dom/Dish CC |
43 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth Int/Exh |
-.310 / .125 |
|
Piston Weight |
600 |
|
Gas Port |
No |
|
Capacity |
541 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
NOT Suitable for nitrous oxide systems (NOS); or 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 Dome 540, Bore 4.500, CH 1.270, Stroke 4.250, Rod 6.385 (CP Pistons S5220) |
|---|---|
| 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 is the recommended compression height for the S5220 pistons?
The S5220 pistons have a compression height of 1.270 inches. This is critical for achieving the desired compression ratio in your Big Block Chev 454 engine.
Can the S5220 pistons be used with nitrous or forced induction?
No, the S5220 pistons are not suitable for nitrous oxide systems, supercharging, or turbocharging. They are designed for naturally aspirated applications only.
What is the weight of the S5220 pistons and how does it affect performance?
The S5220 pistons weigh 600 grams. While this weight is typical for performance applications, it's essential to balance them with the full rotating assembly to ensure optimal engine performance and reliability.
What type of valve reliefs do the S5220 pistons feature?
The S5220 pistons come with radius valve reliefs and generous depths to accommodate high lift camshafts, making them suitable for performance builds with modified cylinder heads.
What is the significance of the accumulator groove in the S5220 pistons?
The accumulator groove in the S5220 pistons helps improve oil control and distribution to the wrist pin, which is crucial for reducing wear and enhancing piston longevity in high-performance applications.
