Chevy LS7 Dome +5cc All 12 deg LS7/ 4.130 bore, 4.125 stroke, 6.125 rod 13.3 to 1 Comp with 66.5cc head (CP Bullets BLS1201-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1201-005 |
|
Bore (in) |
4.13 |
|
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 |
13.3 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
442 |
|
Piston Weight |
456 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Dome +5cc All 12 deg LS7/ 4.130 bore, 4.125 stroke, 6.125 rod 13.3 to 1 Comp with 66.5cc head (CP Bullets BLS1201-005) |
|---|---|
| Brands | CP Carrillo |
| Engine | GM / LS |
| Make | Chevrolet, GM, Holden, LS Chev |
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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 BLS1201-005 pistons?
The BLS1201-005 pistons are designed for a compression ratio of 13.3:1 when used with a 66.5cc LS7 head. Ensure your engine is properly tuned to handle this compression for optimal performance.
What are the specific machining requirements for installing the BLS1201-005 pistons?
When installing the BLS1201-005 pistons, you should ensure that the bore is correctly sized at 4.130 inches with appropriate clearance. Additionally, check ring gaps and ensure the piston pin fit is correct, as machining tolerances can vary.
What is the weight of the BLS1201-005 pistons and how does it affect engine performance?
The BLS1201-005 pistons weigh 456 grams. While this weight is typical for performance applications, lighter pistons can improve throttle response and RPM capabilities. Always consider the balance of the entire rotating assembly.
Can I use the BLS1201-005 pistons with a different stroke or rod length?
The BLS1201-005 pistons are specifically designed for a 4.125-inch stroke and 6.125-inch rod length. Using them with different specifications may lead to clearance issues and affect engine performance.
What type of valve reliefs do the BLS1201-005 pistons have?
The BLS1201-005 pistons feature two valve reliefs. Ensure that your cylinder heads are compatible and that there is sufficient clearance for your specific camshaft profile to avoid interference.
