Chevrolet SB 2.2 Dome 420, Bore 4.155, CH 1.062, Stroke 3.875, Rod 6.000 - Lefts & Rights (CP Pistons S2515)
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|
Make |
Chevrolet |
|
Engine Type |
SB2.2 Dome |
|
Part Number |
S2515 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
3.875 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.062 |
|
Dome / Dish Height |
0.17 |
|
Dom/Dish CC |
1.1 |
|
Pin |
.927 x 2.750 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth Int/Exh |
-.275 / -.080 |
|
Piston Weight |
454 |
|
Gas Port |
Yes |
|
Capacity |
420 |
|
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; Domes may be cut to a flat top ; Balanced to +/- 1 gram; Pick lock grooves for easy lock removal; 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 SB 2.2 Dome 420, Bore 4.155, CH 1.062, Stroke 3.875, Rod 6.000 - Lefts & Rights (CP Pistons S2515) |
|---|---|
| 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 S2515 pistons?
The recommended bore clearance for the S2515 pistons is typically around 0.0030" to 0.0035". However, this can vary based on the specific application and the engine builder's preferences. Always consult with your engine builder for the best fitment.
What type of ring gaps should I use with the S2515 pistons?
For the S2515 pistons, the ring gaps should be set according to the intended use of the engine. Generally, a gap of 0.020" to 0.022" for the top rings and 0.022" to 0.024" for the second rings is a good starting point, but always adjust based on your specific application and boost levels.
Are the S2515 pistons suitable for high boost applications?
Yes, the S2515 pistons are designed to handle high boost levels, especially with their dome design and gas porting. However, reliability will depend on proper tuning, fuel quality, and overall engine assembly. Ensure that the engine is built to handle the desired power levels.
What is the weight of the S2515 pistons and how does it affect performance?
The S2515 pistons weigh 454 grams. This weight is suitable for performance applications, as it helps reduce reciprocating mass, allowing for quicker revs. However, it's essential to balance the entire rotating assembly to ensure optimal performance and reliability.
Can the dome height of the S2515 pistons be modified?
Yes, the dome height of the S2515 pistons can be modified to a flat top if required. This should be done with caution and only by a qualified machinist to ensure that the pistons maintain their structural integrity and performance characteristics.
