Chevy LS7 4.125" bore, 4.00" stroke, 6.125" rod, 1.115 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-STD)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1200-STD |
|
Bore (in) |
4.125 |
|
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 |
428 |
|
Piston Weight |
495 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy LS7 4.125" bore, 4.00" stroke, 6.125" rod, 1.115 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-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 BLSR1200-STD pistons in an LS7 engine?
The BLSR1200-STD pistons provide a compression ratio of 12.9:1 when used with LS7 heads that have a 67.5cc chamber. Ensure that your engine's overall assembly and tuning are compatible with this compression for optimal performance.
What machining considerations should I keep in mind when installing the BLSR1200-STD pistons?
When installing the BLSR1200-STD pistons, ensure that the bore clearance is set correctly according to your specific engine build. Additionally, verify that the ring gaps are appropriate for your application, especially if you plan to run higher boost levels.
What is the weight of the BLSR1200-STD pistons and how does it affect engine balance?
The BLSR1200-STD pistons weigh 495 grams each. This weight should be factored into the overall balance of your rotating assembly. It is critical to balance the crankshaft, rods, and pistons together to ensure smooth operation at high RPMs.
Are the BLSR1200-STD pistons suitable for high-performance applications?
Yes, the BLSR1200-STD pistons are designed for high-performance applications, particularly in LS7 engines. They feature a dome design and gas ports, making them suitable for applications that may see increased boost and power levels. However, ensure that your engine is built to handle the stresses involved.
What type of pin is used with the BLSR1200-STD pistons?
The BLSR1200-STD pistons use a pin size of .927 inches by 2.250 inches. Ensure that your conrods are compatible with this pin size for proper fitment and function.
