Chevy LS7 12° Heads 4.130 bore, 4.000 stroke, 6.125 rod, 1.115 CH, -25cc dish dome 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1203-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1203-005 |
|
Bore (in) |
4.13 |
|
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 |
-25.12 |
|
Compression Ratio |
9 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / -.161 |
|
Cubic Inch |
428 |
|
Piston Weight |
452 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 12° Heads 4.130 bore, 4.000 stroke, 6.125 rod, 1.115 CH, -25cc dish dome 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1203-005) |
|---|---|
| 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 BLS1203-005 pistons?
The BLS1203-005 pistons are designed to achieve a compression ratio of approximately 9:1 when used with LS7 cylinder heads that have a 70cc combustion chamber.
What are the specific ring thicknesses for the BLS1203-005 pistons?
The BLS1203-005 pistons come with a ring thickness of 1.5mm for both the top and second rings, and a 3.0mm oil control ring.
What is the piston weight of the BLS1203-005, and how might it affect engine performance?
The BLS1203-005 pistons weigh 452 grams. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your engine is balanced properly to accommodate this weight.
What type of valve reliefs do the BLS1203-005 pistons feature?
The BLS1203-005 pistons are designed with two valve reliefs to accommodate LS7 cylinder head configurations, ensuring proper clearance for the valves during operation.
Are the BLS1203-005 pistons suitable for high-performance applications?
Yes, the BLS1203-005 pistons are designed for high-performance applications, particularly in LS7 engines. However, ensure proper tuning, fuel quality, and machining to achieve reliable performance.
