Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.120 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1200-010 |
|
Bore (in) |
4.135 |
|
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 |
430 |
|
Piston Weight |
499 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.120 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1200-010) |
|---|---|
| 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 BLSR1200-010 pistons?
The BLSR1200-010 pistons are designed to achieve a compression ratio of approximately 12.9:1 when used with LS7 heads and the specified bore and stroke. Ensure that your engine's overall setup, including head cc and gasket thickness, is accounted for to maintain this ratio.
What are the specific machining requirements for the BLSR1200-010 pistons?
When using the BLSR1200-010 pistons, it's crucial to ensure proper bore clearance and set the ring gaps according to your engine's specifications. Additionally, verify that the piston pin bores are correctly sized for your connecting rods, as variations can occur.
What type of valve reliefs do the BLSR1200-010 pistons have?
The BLSR1200-010 pistons feature two valve reliefs, which are designed to accommodate LS7 cylinder head configurations. Ensure that your valve lift and duration are compatible to avoid any interference.
What is the weight of the BLSR1200-010 pistons, and how does it affect performance?
The BLSR1200-010 pistons weigh 499 grams each. This weight is suitable for high-performance applications, but it's important to balance the entire rotating assembly to maintain engine reliability and performance at high RPMs.
Can I use the BLSR1200-010 pistons with a different stroke or rod length?
The BLSR1200-010 pistons are specifically designed for a 4.000-inch stroke and 6.125-inch rod length. Using them with different specifications may lead to improper fitment and performance issues, so it is recommended to stick to the intended setup.
