Chevy LS7 12° Heads 4.130 bore, 4.000 stroke, 6.125 rod, 1.120 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1200-005 |
|
Bore (in) |
4.13 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
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 |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
497 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy LS7 12° Heads 4.130 bore, 4.000 stroke, 6.125 rod, 1.120 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-005) |
|---|---|
| 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 BLSR1200-005 pistons?
The BLSR1200-005 pistons are designed to achieve a compression ratio of approximately 12.9:1 when used with LS7 cylinder heads and the specified bore and stroke.
What are the specific machining requirements for the BLSR1200-005 pistons?
Ensure that the bore clearance is set according to the engine builder's specifications. Additionally, verify that the ring gaps are appropriately set for the intended application, as this can significantly affect performance and reliability.
What is the weight of the BLSR1200-005 pistons and how does it affect engine performance?
The BLSR1200-005 pistons weigh 497 grams. Lighter pistons can improve throttle response and reduce stress on the connecting rods, but ensure that the overall rotating assembly is balanced for optimal performance.
Do the BLSR1200-005 pistons come with gas ports, and what is their purpose?
Yes, the BLSR1200-005 pistons feature gas ports. These ports help improve ring seal and reduce blow-by, which can enhance performance and efficiency, especially under high boost conditions.
What type of valve reliefs do the BLSR1200-005 pistons have?
The BLSR1200-005 pistons are designed with two valve reliefs to accommodate LS7 cylinder head configurations, ensuring proper clearance for the valves during operation.
