Chevrolet 13° Flat Top 400 Chevrolet 431, Bore 4.145, CH 1.000, Stroke 4.000, Rod 6.000 - Lefts & Rights (CP Pistons S2403)
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|
Make |
Chevrolet |
|
Engine Type |
13˚ Flat Top 400 Chevy |
|
Part Number |
S2403 |
|
Bore (in) |
4.145 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6 |
|
Comp Height |
1 |
|
Dome / Dish Height |
F.T |
|
Dom/Dish CC |
-8.8 |
|
Pin |
.927 x 2.750 |
|
Ring Thickness |
.043 x .043 x 3.0mm |
|
VR Depth Int/Exh |
-.300 / SP |
|
Piston Weight |
427 |
|
Gas Port |
Yes |
|
Capacity |
432 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
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 | Chevrolet 13° Flat Top 400 Chevrolet 431, Bore 4.145, CH 1.000, Stroke 4.000, Rod 6.000 - Lefts & Rights (CP Pistons S2403) |
|---|---|
| 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 is the recommended bore clearance for the S2403 pistons?
The S2403 pistons are designed for a 4.145-inch bore. Typically, a clearance of 0.0030 to 0.0040 inches is recommended, but this can vary based on your specific engine build and operating conditions. Always consult your engine builder for precise specifications.
What type of ring gaps should I use with the S2403 pistons?
For the S2403 pistons, the ring gaps should be set according to the intended use of the engine. Generally, for a performance application, a top ring gap of 0.018 to 0.022 inches and a second ring gap of 0.016 to 0.020 inches is a good starting point. However, always verify with your engine builder based on your specific setup.
Can I modify the dome height of the S2403 pistons?
Yes, the domes of the S2403 pistons can be cut to a flat top if desired. This modification can affect compression ratio and combustion characteristics, so it should be done with careful consideration of your engine's specifications and tuning requirements.
What is the significance of the gas ports in the S2403 pistons?
The gas ports in the S2403 pistons are designed 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 where maintaining optimal cylinder pressure is crucial.
How do I ensure proper fitment of the S2403 pistons in my engine?
To ensure proper fitment of the S2403 pistons, you should verify that your connecting rods are compatible with the 6.000-inch length and that your crankshaft stroke matches the 4.000-inch specification. Additionally, proper machining of the cylinder bores and careful assembly are critical for optimal performance.
