Chevrolet 18° Flat Top 400 Chevrolet with Gas Ports 420, Bore 4.155, CH 1.062, Stroke 3.875, Rod 6.000 - Lefts & Rights (CP Pistons S2181)
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|
Make |
Chevrolet |
|
Engine Type |
18˚ Flat Top 400 Chevy With Gas Ports |
|
Part Number |
S2181 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
3.875 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.062 |
|
Dome / Dish Height |
F.T |
|
Dom/Dish CC |
-7.2 |
|
Pin |
.927 x 2.750 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth Int/Exh |
-.330 / SP |
|
Piston Weight |
447 |
|
Gas Port |
Yes |
|
Capacity |
420 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
Dedicated right and left forgings; Wrist pins and pin-fitting included at no cost; Accumulator groove included; Double pin oilers, force fed from oil ring; Designed for back cut rings; Chamfered ring and wire locks; Balanced to +/- 1 gram ; Pick lock grooves for easy lock removal; Fully CNC Machined. Notes: D – Rail Support included , G – Supplied with Wire Locks
| Product Name | Chevrolet 18° Flat Top 400 Chevrolet with Gas Ports 420, Bore 4.155, CH 1.062, Stroke 3.875, Rod 6.000 - Lefts & Rights (CP Pistons S2181) |
|---|---|
| Brands | CP Carrillo |
| Engine | 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 specific machining requirements for the S2181 pistons?
The S2181 pistons require careful attention to bore clearance and ring gap settings. Ensure that the bore is honed to the correct size for a 4.155-inch diameter and that the ring gaps are set according to your engine's specific requirements, particularly considering the intended use and power levels.
What is the weight of the S2181 pistons and how does it affect performance?
The S2181 pistons weigh 447 grams each. This weight is designed to balance performance and durability, but it's crucial to ensure that the entire rotating assembly is balanced correctly to minimise vibrations and maximise engine efficiency.
How do the gas ports on the S2181 pistons enhance performance?
The gas ports on the S2181 pistons help improve cylinder pressure and combustion efficiency by allowing exhaust gases to flow into the ring pack. This can lead to better ring sealing and reduced blow-by, which is beneficial for high-performance applications.
What is the significance of the dedicated right and left forgings in the S2181 pistons?
The dedicated right and left forgings ensure optimal fitment and performance in the engine. This design consideration helps maintain consistent combustion characteristics and reduces the risk of piston slap, ultimately contributing to better reliability and performance.
What is the expected lead time for the S2181 pistons since they are made to order?
As the S2181 pistons are made to order, you should expect a lead time of approximately 6-8 weeks for delivery. Plan your engine build accordingly to accommodate this timeframe.
