Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.115 CH, -25cc dish dome 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1203-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1203-010 |
|
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 |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / -.161 |
|
Cubic Inch |
429 |
|
Piston Weight |
453 |
|
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 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1203-010) |
|---|---|
| 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 BLS1203-010 pistons?
The BLS1203-010 pistons are designed to achieve a compression ratio of approximately 9.2 when used with LS7 heads that have a 70cc chamber. However, actual compression may vary based on the specific engine configuration and machining tolerances.
What are the specific ring thicknesses for the BLS1203-010 pistons?
The BLS1203-010 pistons come with a ring thickness of 1.5mm for both the top and second rings, and a 3.0mm thickness for the oil ring. Ensure proper ring gap settings are established during installation.
What is the weight of the BLS1203-010 pistons?
Each BLS1203-010 piston weighs approximately 453 grams. It's important to consider this weight when balancing the rotating assembly for optimal engine performance.
Are there any specific machining requirements for the BLS1203-010 pistons?
Yes, the BLS1203-010 pistons require correct bore clearance and ring gaps to be set by the engine builder. Ensure that the cylinder bore is honed to the appropriate size for a proper fit.
What is the dome/dish height of the BLS1203-010 pistons?
The BLS1203-010 pistons feature a dish height of -0.163 inches, which contributes to the overall compression ratio and combustion characteristics. Ensure compatibility with your engine's specifications.
