Chevrolet SBC 350 - Flat Top, 2.020/1.600 valve milled head 358, Bore 4.040, CH 1.550, Stroke 3.500, Rod 5.700 (CP Pistons S1253)
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|
Make |
Chevrolet |
|
Engine Type |
SBC 350 - Flat Top, 2.020/1.600 valve milled head |
|
Part Number |
S1253 |
|
Bore (in) |
4.04 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.55 |
|
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 |
418 |
|
Gas Port |
Yes |
|
Capacity |
359 |
|
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 358, Bore 4.040, CH 1.550, Stroke 3.500, Rod 5.700 (CP Pistons S1253) |
|---|---|
| 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 S1253 pistons?
For the S1253 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and the materials used.
What is the purpose of the gas ports on the S1253 pistons?
The gas ports on the S1253 pistons are designed to improve ring sealing and reduce blow-by by allowing combustion gases to pressurise the ring area. This can enhance performance, especially in high RPM applications.
Can the S1253 pistons be used with a 3.750 stroke crankshaft?
Yes, the S1253 pistons can be used with a 3.750 stroke crankshaft, provided that the engine builder ensures proper clearance and fitment with the connecting rods and cylinder head.
What type of locks are supplied with the S1253 pistons?
The S1253 pistons come supplied with double spiral locks, which help secure the wrist pins in place and ensure reliable operation under high-stress conditions.
What is the weight of the S1253 pistons, and how does it affect performance?
The S1253 pistons weigh 418 grams. Lighter pistons can reduce reciprocating mass, allowing for quicker engine response and higher RPM potential, but it's important to balance this with the overall engine design and intended use.
