Chevy LS7 12° Heads 4.130 bore, 4.125 stroke, 6.125 rod, 1.055 CH, -5cc Flat Top 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1205-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1205-005 |
|
Bore (in) |
4.13 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.055 |
|
Head Type |
LS7 |
|
Head CC |
70 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-4.6 |
|
Compression Ratio |
11.4 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.220 / -.161 |
|
Cubic Inch |
442 |
|
Piston Weight |
467 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 12° Heads 4.130 bore, 4.125 stroke, 6.125 rod, 1.055 CH, -5cc Flat Top 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1205-005) |
|---|---|
| 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 BLSR1205-005 pistons?
The BLSR1205-005 pistons are designed to achieve a compression ratio of approximately 11.4:1 when used with LS7 heads featuring a 70cc combustion chamber. Ensure that your engine's overall setup supports this ratio for optimal performance.
What are the specific ring thicknesses for the BLSR1205-005 pistons?
The BLSR1205-005 pistons come with a ring thickness of 1.2mm for both the top and second rings, and a 3.0mm thickness for the oil control ring. Proper installation and gap settings are crucial for performance and longevity.
What is the piston weight of the BLSR1205-005, and how does it affect engine performance?
The BLSR1205-005 pistons weigh 467 grams. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your engine is balanced correctly to accommodate this weight for optimal performance.
Do the BLSR1205-005 pistons require any specific machining before installation?
Before installation, ensure that the bore clearance is set correctly according to your engine's specifications. Additionally, verify that the ring gaps are adjusted properly to prevent any issues during operation.
What type of valve reliefs are included with the BLSR1205-005 pistons?
The BLSR1205-005 pistons feature two valve reliefs designed to accommodate LS7 engine configurations. Ensure that your camshaft and valve train setup are compatible to prevent interference.
