Chevy LS7 Dome +5cc All 12 deg LS7/ 4.135 bore, 4.000 stroke, 6.125 rod 12.9 to 1 Comp with 67.5cc head (CP Bullets BLS1200-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1200-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.12 |
|
Head Type |
LS7 |
|
Head CC |
67.5 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
5 |
|
Compression Ratio |
12.9 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
490 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Dome +5cc All 12 deg LS7/ 4.135 bore, 4.000 stroke, 6.125 rod 12.9 to 1 Comp with 67.5cc head (CP Bullets BLS1200-010) |
|---|---|
| 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 compression ratio for the BLS1200-010 pistons?
The BLS1200-010 pistons are designed to achieve a compression ratio of 12.9:1 when used with LS7 heads that have a combustion chamber volume of 67.5cc.
What are the specific machining requirements for installing the BLS1200-010 pistons?
When installing the BLS1200-010 pistons, ensure the bore clearance is set correctly according to your engine's specifications. Additionally, verify that the ring gaps are appropriately sized for your application, as this can affect performance and reliability.
What is the weight of the BLS1200-010 pistons, and how does it affect engine balance?
The BLS1200-010 pistons weigh 490 grams. It's crucial to consider this weight when balancing the crankshaft and rotating assembly, as mismatched weights can lead to vibrations and reduced engine performance.
Do the BLS1200-010 pistons come with valve reliefs, and how many are there?
Yes, the BLS1200-010 pistons feature two valve reliefs, which are designed to accommodate LS7 engine specifications and prevent piston-to-valve contact during operation.
What is the dome height of the BLS1200-010 pistons, and how does it impact combustion?
The dome height of the BLS1200-010 pistons is 0.175 inches. This dome design helps to increase the compression ratio and can enhance combustion efficiency, but it must be matched with the correct head and tuning for optimal performance.
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