Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.115 CH, -25cc dish dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1203-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1203-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
Head Type |
LS7 |
|
Head CC |
70 |
|
Dome / Dish Height |
0.163 |
|
Dom/Dish CC |
-25.13 |
|
Compression Ratio |
9.2 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
430 |
|
Piston Weight |
457 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.115 CH, -25cc dish dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1203-010) |
|---|---|
| Brands | CP Carrillo |
| Engine | GM / LS |
| Make | Chevrolet, GM, Holden, LS Chev |
Delivery & Freight
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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 compression ratio for the BLSR1203-010 pistons?
The BLSR1203-010 pistons are designed for a compression ratio of approximately 9.2:1 when used with LS7 heads and a suitable engine configuration. Ensure that your engine's overall setup, including head volume and gasket thickness, supports this ratio for optimal performance.
What machining considerations should I keep in mind for these pistons?
When installing the BLSR1203-010 pistons, ensure that the bore clearance is set according to the manufacturer's specifications. Additionally, check that the ring gaps are properly set based on your specific application and operating conditions to prevent issues such as blow-by or ring failure.
What is the weight of the BLSR1203-010 pistons, and how does it affect performance?
The BLSR1203-010 pistons weigh 457 grams each. This weight is relatively light for performance applications, which can help reduce reciprocating mass and improve engine response. However, always consider the balance of the entire rotating assembly for optimal performance.
Are there specific applications or setups where the BLSR1203-010 pistons perform best?
The BLSR1203-010 pistons are well-suited for high-performance LS7 builds, particularly in applications where a balance of power and reliability is desired. They are ideal for naturally aspirated or mild forced induction setups, but always ensure proper tuning and fuel quality for best results.
What type of pin is used with the BLSR1203-010 pistons?
The BLSR1203-010 pistons use a .927 x 2.250 inch pin. Ensure that your connecting rods are compatible with this pin size for proper fitment and performance.
