Chevy LS7 Dome +5cc All 12 deg LS7/ 4.125 bore, 4.125 stroke, 6.125 rod 13.2 to 1 Comp with 66.5cc head (CP Bullets BLS1201-STD)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1201-STD |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.055 |
|
Head Type |
LS7 |
|
Head CC |
66.5 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
5 |
|
Compression Ratio |
13.2 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
441 |
|
Piston Weight |
458 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Dome +5cc All 12 deg LS7/ 4.125 bore, 4.125 stroke, 6.125 rod 13.2 to 1 Comp with 66.5cc head (CP Bullets BLS1201-STD) |
|---|---|
| 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 BLS1201-STD pistons?
The BLS1201-STD pistons are designed to achieve a compression ratio of 13.2:1 when used with a 66.5cc LS7 head. Ensure that your engine's setup aligns with this specification for optimal performance.
What are the specific machining requirements for the BLS1201-STD pistons?
When installing BLS1201-STD pistons, verify that the bore clearance is set correctly and that the ring gaps are tailored to your engine's application. Proper machining is crucial to prevent issues under high RPM and boost conditions.
What type of valve reliefs do the BLS1201-STD pistons have?
The BLS1201-STD pistons feature two valve reliefs, which are designed to accommodate LS7 engine specifications. Ensure your camshaft profile is compatible to avoid interference.
What is the weight of the BLS1201-STD pistons?
Each BLS1201-STD piston weighs 458 grams. This weight should be considered when balancing your rotating assembly to maintain engine performance and reliability.
Are there any specific considerations for using the BLS1201-STD pistons in a turbocharged application?
While the BLS1201-STD pistons can be used in turbocharged applications, ensure that your tuning, fuel quality, and boost levels are appropriate for the 13.2:1 compression ratio. Reliability will depend on proper setup and clearances.
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