Chevrolet SBC 350 - Flat Top, 2.020/1.600 valve milled head 355, Bore 4.020, CH 1.000, Stroke 3.500, Rod 6.250 (CP Pistons S1230)

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|
Make |
Chevrolet |
|
Engine Type |
SBC 350 - Flat Top, 2.020/1.600 valve milled head |
|
Part Number |
S1230 |
|
Bore (in) |
4.02 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
6.25 |
|
Comp Height |
1 |
|
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 |
337 |
|
Gas Port |
Yes |
|
Capacity |
355 |
|
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 355, Bore 4.020, CH 1.000, Stroke 3.500, Rod 6.250 (CP Pistons S1230) |
|---|---|
| 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 S1230 pistons?
For the S1230 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on specific engine build tolerances and operating conditions, so it's best to consult with your engine builder.
Can the S1230 pistons be used with a 3.750 stroke crankshaft?
Yes, the S1230 pistons are designed to be compatible with a 3.750 stroke crankshaft. Ensure that your connecting rods and clearance are suitable for this configuration.
What is the weight of the S1230 pistons and how does it affect performance?
The S1230 pistons weigh 337 grams each. This weight is beneficial for performance applications as it helps reduce reciprocating mass, leading to improved throttle response and higher RPM potential, provided the rest of the engine is balanced accordingly.
What type of gas porting is included with the S1230 pistons?
The S1230 pistons come with gas ports, which help improve ring sealing and reduce blow-by, especially in high-performance applications. Ensure proper tuning and ring gap settings to maximise the benefits of the gas porting.
What is the significance of the -5 cc dome/dish volume in the S1230 pistons?
The -5 cc dome/dish volume indicates that these pistons have a slight negative volume, which contributes to the overall compression ratio of the engine. This is important for tuning your engine for optimal performance and should be considered when calculating your target compression ratio.