Chevrolet BBC 454 Dome 466, Bore 4.310, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5256)
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|
Make |
Chevrolet |
|
Engine Type |
BBC 454 Dome |
|
Part Number |
S5256 |
|
Bore (in) |
4.31 |
|
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 |
640 |
|
Gas Port |
No |
|
Capacity |
467 |
|
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 466, Bore 4.310, CH 1.645, Stroke 4.000, Rod 6.135 (CP Pistons S5256) |
|---|---|
| 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 S5256 pistons?
For the S5256 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this may vary based on the specific application and operating conditions, so it's essential to consult with your engine builder for precise measurements.
Can I use the S5256 pistons with a supercharger or turbocharger?
No, the S5256 pistons are not suitable for use with nitrous oxide systems, superchargers, or turbochargers. They are designed for naturally aspirated applications only.
What is the maximum stroke length compatible with the S5256 pistons?
The S5256 pistons can be used with a maximum stroke length of 4.500" when paired with a 10.180" block height and a 6.535" rod. Ensure to verify compatibility with your specific engine setup.
What type of wrist pins are included with the S5256 pistons?
The S5256 pistons come with .990 x 2.930 wrist pins included at no extra cost. These pins are designed for optimal fitment and performance in your engine.
What is the weight of the S5256 pistons and how does it affect engine balance?
The S5256 pistons weigh 640 grams each. It's crucial to balance these pistons with the full rotating assembly to ensure smooth operation and prevent vibrations at high RPMs.
