Chevy LS2 Dish -30cc All std 15 deg/ L92 4.125 bore, 4.125 stroke, 6.125 rod 9.4 to 1 Comp with 68cc head (CP Bullets BLS1134-125)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1134-125 |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.065 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
-0.175 |
|
Dom/Dish CC |
-28.56 |
|
Compression Ratio |
9 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.265 / SP |
|
Cubic Inch |
441 |
|
Piston Weight |
440 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 Dish -30cc All std 15 deg/ L92 4.125 bore, 4.125 stroke, 6.125 rod 9.4 to 1 Comp with 68cc head (CP Bullets BLS1134-125) |
|---|---|
| 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 BLS1134-125 pistons?
The BLS1134-125 pistons are designed to achieve a compression ratio of approximately 9.4 to 1 when used with a 68cc cylinder head. However, actual compression ratios may vary based on factors such as head gasket thickness and combustion chamber modifications.
What bore and stroke specifications are compatible with the BLS1134-125 pistons?
These pistons are designed for a 4.125-inch bore and a 4.125-inch stroke, making them suitable for a 441 cubic inch engine configuration with a 6.125-inch rod length.
What is the weight of the BLS1134-125 pistons, and how does it affect engine balance?
The BLS1134-125 pistons weigh 440 grams each. It's essential to consider piston weight when balancing the rotating assembly, as discrepancies can lead to vibrations and affect engine performance.
Are there specific machining requirements for the BLS1134-125 pistons?
Yes, proper bore clearance must be established for the BLS1134-125 pistons, along with appropriate ring gap settings. It's crucial to follow the manufacturer's recommendations and consult with your engine builder for specific machining needs.
What type of valve reliefs do the BLS1134-125 pistons have?
The BLS1134-125 pistons feature two valve reliefs, which are designed to accommodate standard LS valve sizes. Ensure that your cylinder heads and camshaft profile are compatible to avoid any interference.
