Chevrolet BBC 454 Inverted Dome 508, Bore 4.500, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5140)
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|
Make |
Chevrolet |
|
Engine Type |
BBC 454 Inverted Dome |
|
Part Number |
S5140 |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.135 |
|
Comp Height |
1.645 |
|
Dome / Dish Height |
-0.036 |
|
Dom/Dish CC |
-8 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth Int/Exh |
-0.32 |
|
Piston Weight |
689 |
|
Gas Port |
No |
|
Capacity |
509 |
|
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 508, Bore 4.500, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5140) |
|---|---|
| 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 applications for the CP Pistons S5140?
The CP Pistons S5140 are designed for high-performance applications in the Chevrolet Big Block 454 engine. They are suitable for use with nitrous oxide systems, as well as supercharged or turbocharged setups, making them ideal for racing and performance builds.
What machining considerations should I keep in mind when using these pistons?
When installing the S5140 pistons, ensure that the bore clearance is set correctly according to your engine's specifications. Additionally, check the ring gaps to accommodate the intended operating conditions, especially if you plan to run high boost or nitrous.
What is the weight of the CP Pistons S5140, and how does it affect performance?
The S5140 pistons weigh 689 grams. While this weight is suitable for high-performance applications, it's important to balance the entire rotating assembly to minimise vibrations and ensure optimal engine performance.
Can the CP Pistons S5140 be used with angle milled heads?
Yes, the S5140 pistons are designed to be compatible with angle milled heads, thanks to their generous valve relief depths. This allows for high lift camshafts without clearance issues.
What is the significance of the double pin oilers included with these pistons?
The double pin oilers in the S5140 pistons provide enhanced lubrication to the wrist pins, which is crucial for high-performance applications. This feature helps reduce friction and wear, contributing to the overall reliability of the engine under high-stress conditions.
