Chevy LS7 Dome +5cc All 12 deg LS7/ 4.155 bore, 4.000 stroke, 6.125 rod 13.1 to 1 Comp with 67.5cc head (CP Bullets BLS1200-030)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1200-030 |
|
Bore (in) |
4.155 |
|
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 |
13 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
432 |
|
Piston Weight |
488 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Dome +5cc All 12 deg LS7/ 4.155 bore, 4.000 stroke, 6.125 rod 13.1 to 1 Comp with 67.5cc head (CP Bullets BLS1200-030) |
|---|---|
| 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 BLS1200-030 pistons?
The BLS1200-030 pistons are designed for a compression ratio of 13.1:1 when used with a 67.5cc LS7 head. Ensure that your engine's configuration supports this ratio for optimal performance.
What bore size is compatible with the BLS1200-030 pistons?
These pistons are designed for a bore size of 4.155 inches. Proper machining of the cylinder bores is essential to achieve the correct clearance and fitment.
What are the specifications for the pin used in the BLS1200-030 pistons?
The BLS1200-030 pistons use a pin size of .927 inches in diameter and 2.250 inches in length. Ensure that your conrods are compatible with these pin specifications.
What is the weight of the BLS1200-030 pistons?
Each BLS1200-030 piston weighs 488 grams. Consider this weight when balancing your rotating assembly for optimal engine performance.
Do the BLS1200-030 pistons have valve reliefs?
Yes, the BLS1200-030 pistons feature two valve reliefs. This design is crucial for clearance with the LS7's valve train, especially at higher RPMs.
