Chevrolet SBC 350 - Flat Top, 2.020/1.600 valve milled head 357, Bore 4.030, CH 1.125, Stroke 3.500, Rod 6.125 (CP Pistons S1221)
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|
Make |
Chevrolet |
|
Engine Type |
SBC 350 - Flat Top, 2.020/1.600 valve milled head |
|
Part Number |
S1221 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.125 |
|
Dome / Dish Height |
F.T |
|
Dom/Dish CC |
-5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
.043 x .043 x 3.0mm |
|
VR Depth Int/Exh |
-.335 / SP |
|
Piston Weight |
363 |
|
Gas Port |
Yes |
|
Capacity |
357 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
Stronger forging designed for 500 CFM two and four barrel applications; with dedicated right and left hand forgings; Suitable for angle milled heads; Accumulator grooves included as well as wrist pins and pin fitting at no cost; Double pin oilers; force fed from oil ring; Fully CNC machined. Notes: B - Supplied with Double Spiral Locks, C - .10 Deck Clearance with 3.480 Stroke, D - Rail Support included, E - Can be used with 3.750 Stroke & 6.000 Rod.
| Product Name | Chevrolet SBC 350 - Flat Top, 2.020/1.600 valve milled head 357, Bore 4.030, CH 1.125, Stroke 3.500, Rod 6.125 (CP Pistons S1221) |
|---|---|
| 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 CP Pistons S1221?
For the CP Pistons S1221, a typical bore clearance is around 0.0030" to 0.0035". However, this can vary based on the specific application and the builder's preferences. Always consult with your engine builder for the best fitment.
What type of fuel is recommended for the Chevrolet SBC 350 with these pistons?
These pistons are designed for high-performance applications and are best suited for premium unleaded fuel or race fuel, depending on your compression ratio and tuning. Ensure your fuel quality matches your engine's performance goals.
Can the CP Pistons S1221 be used with a 3.750 stroke crankshaft?
Yes, the CP Pistons S1221 can be used with a 3.750 stroke crankshaft. Ensure that the engine builder accounts for the necessary clearances and any potential modifications required for optimal performance.
What is the significance of the gas ports in the CP Pistons S1221?
The gas ports in the CP Pistons S1221 help improve ring seal and reduce the chances of ring flutter at high RPMs. This feature is particularly beneficial for applications that require consistent performance under high load conditions.
What is the weight of the CP Pistons S1221 and how does it affect performance?
The CP Pistons S1221 weighs 363 grams. This weight is designed to balance performance and durability. Lighter pistons can improve throttle response and reduce stress on the engine, but ensure that your engine is built to handle the specific characteristics of these pistons.
