Small Block Chevrolet 406 ci Fit All 13deg Dome, Bore 4.125, CH 1.100, Stroke 3.800, Rod 6.000 - Lefts & Rights (CP Pistons S2420A)
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|
Make |
Chevrolet |
|
Engine Type |
13˚ Dome 400 Chevy |
|
Part Number |
S2420A |
|
Bore (in) |
4.125 |
|
Stroke (in) |
3.8 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.1 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
-4.97 |
|
Pin |
.927 x 2.750 |
|
Ring Thickness |
.043 x .043 x 3.0mm |
|
VR Depth Int/Exh |
-.315 / SP |
|
Piston Weight |
472 |
|
Gas Port |
Yes |
|
Capacity |
406 |
|
Shlef (RPO) or Made to Order (MTO) |
ROP |
Dedicated right and left forgings; Pin-fitting included at no cost; Chamfered pins and wire locks included; Accumulator and anti-detonation grooves included; Double pin oilers, force fed from oil ring; Radius valve reliefs; Balanced to +/- 1 gram; Pick lock grooves for easy lock removal; Domes may be cut to a flat top; Designed for back-cut rings; Custom skirt cam and barrel shapes; Fully CNC Machined. Notes: D – Rail Support included, G – Supplied with Wire Locks
| Product Name | Small Block Chevrolet 406 ci Fit All 13deg Dome, Bore 4.125, CH 1.100, Stroke 3.800, Rod 6.000 - Lefts & Rights (CP Pistons S2420A) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| 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 bore clearance for the S2420A pistons?
For the S2420A pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on the specific engine build and intended use.
What type of ring gaps should I use with the S2420A pistons?
Ring gaps for the S2420A pistons should be set according to the application and boost levels. Generally, a gap of 0.004" per inch of bore is a good starting point, but adjustments may be necessary based on the engine's specific requirements.
Can the dome height of the S2420A pistons be modified?
Yes, the dome height of the S2420A pistons can be cut to a flat top if required. However, this should be done with caution to maintain the structural integrity of the piston and ensure proper combustion characteristics.
What is the significance of the gas ports in the S2420A pistons?
The gas ports in the S2420A pistons help to improve ring seal and reduce blow-by by allowing combustion gases to pressurise the ring area. This feature is particularly beneficial in high-performance applications.
What should I consider when balancing the rotating assembly with S2420A pistons?
When balancing the rotating assembly with S2420A pistons, ensure that the entire assembly, including the crankshaft, conrods, and pistons, is balanced to within +/- 1 gram. This will help to minimise vibrations and improve engine performance.
