Chevy LS7 12° Heads 4.135 bore, 4.125 stroke, 6.125 rod, 1.055 CH, -5cc Flat Top 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1205-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1205-010 |
|
Bore (in) |
4.135 |
|
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 |
11.6 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
443 |
|
Piston Weight |
459 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 12° Heads 4.135 bore, 4.125 stroke, 6.125 rod, 1.055 CH, -5cc Flat Top 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1205-010) |
|---|---|
| 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 bore clearance for the BLS1205-010 pistons?
For the BLS1205-010 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and intended use.
What compression ratio can I expect with the BLS1205-010 pistons in an LS7 engine?
The BLS1205-010 pistons provide a compression ratio of approximately 11.6:1 when used with LS7 heads. Ensure that your engine's specific configuration and fuel quality support this compression for optimal performance.
What is the weight of the BLS1205-010 pistons, and how does it affect performance?
The BLS1205-010 pistons weigh 459 grams each. While lighter pistons can improve throttle response and reduce reciprocating mass, it's essential to balance them with the rest of the rotating assembly for reliability.
Do the BLS1205-010 pistons require any specific machining?
Yes, the BLS1205-010 pistons may require specific bore honing to achieve the correct clearance. Additionally, ensure that the piston ring gaps are set appropriately based on your engine's application and expected RPM.
What type of rings are included with the BLS1205-010 pistons?
The BLS1205-010 pistons come with 1.5mm x 1.5mm x 3.0mm rings. These rings are designed for performance applications, but proper ring gap settings are crucial for optimal sealing and performance.
