Chevrolet BBC 454 Dome 508, Bore 4.500, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5250)
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|
Make |
Chevrolet |
|
Engine Type |
BBC 454 Dome |
|
Part Number |
S5250 |
|
Bore (in) |
4.5 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.135 |
|
Comp Height |
1.645 |
|
Dome / Dish Height |
0.7 |
|
Dom/Dish CC |
47.5 |
|
Pin |
.990 x 2.930 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth Int/Exh |
-.310 / .125 |
|
Piston Weight |
676 |
|
Gas Port |
No |
|
Capacity |
509 |
|
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 508, Bore 4.500, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5250) |
|---|---|
| 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 S5250?
The CP Pistons S5250 are designed specifically for Big Block Chevrolet 454 engines. They are suitable for high-performance applications but are not recommended for nitrous oxide systems or supercharged/turbo setups.
What machining considerations should I keep in mind when using these pistons?
When using the S5250 pistons, ensure that the bore clearance is set correctly according to your engine's specifications. Additionally, the ring gaps must be tailored to your specific application, taking into account the expected RPM and power levels.
What is the weight of the CP Pistons S5250 and how does it affect my engine build?
The S5250 pistons weigh 676 grams each. This weight can impact the overall balance of your rotating assembly, so it's crucial to balance the crankshaft with the full rotating assembly to maintain engine reliability and performance.
Can these pistons be used with angle milled cylinder heads?
Yes, the S5250 pistons are suitable for use with angle milled heads, thanks to their generous valve relief depths which accommodate high lift camshafts.
What is the significance of the double pin oilers in the S5250 pistons?
The double pin oilers in the S5250 pistons are designed to provide enhanced lubrication to the wrist pins. This feature helps reduce wear and increase the longevity of the pistons, especially in high-performance applications.
