SBC 407ci Fit All 13°, Bore 4.130, CH 1.100, Stroke 3.800, Rod 6.000, CR 13.8, Dome, 50 Head CC - Lefts & Rights (CP Pistons S2421A)
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|
Make |
Chevrolet |
|
Engine Type |
13˚ Dome 400 Chevy |
|
Part Number |
S2421A |
|
Bore (in) |
4.13 |
|
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 |
473 |
|
Gas Port |
Yes |
|
Capacity |
407 |
|
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 | SBC 407ci Fit All 13°, Bore 4.130, CH 1.100, Stroke 3.800, Rod 6.000, CR 13.8, Dome, 50 Head CC - Lefts & Rights (CP Pistons S2421A) |
|---|---|
| Brands | CP Carrillo |
| Engine | 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 compression ratio for the SBC 407ci with these pistons?
The SBC 407ci pistons (SKU S2421A) are designed to achieve a compression ratio of 13.8:1 when used with a 50cc combustion chamber. Ensure that your cylinder head and gasket choices align with this specification for optimal performance.
What machining is required for these pistons?
These pistons may require precise bore clearance and ring gap settings, which depend on your specific engine build. It's crucial to check the bore size and ensure proper fitment, as well as to verify that the piston-to-wall clearance is within the recommended range for your application.
What is the weight of the S2421A pistons and how does it affect performance?
Each S2421A piston weighs 473 grams. This weight is suitable for high-performance applications, but it's essential to balance the entire rotating assembly to minimise vibrations and ensure reliability at high RPMs.
Can the dome height of these pistons be modified?
Yes, the domes on the S2421A pistons can be cut to a flat top if desired. However, any modifications should be done carefully to maintain the integrity of the piston and ensure proper compression characteristics.
What type of gas porting is included with these pistons?
The S2421A pistons feature gas ports that are designed to enhance ring seal and improve performance. These ports allow for better oil control and reduced blow-by, which is particularly beneficial in high-performance applications.
