Chevy LS2 Dish -21.5cc All std 15 deg/ L92 4.030 bore, 4.125 stroke, 6.125 rod 9.5 to 1 Comp with 68cc head (CP Bullets BLS1134-030)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1134-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.05 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
-0.1455 |
|
Dom/Dish CC |
-21.5 |
|
Compression Ratio |
9.5 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
421 |
|
Piston Weight |
406 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 Dish -21.5cc All std 15 deg/ L92 4.030 bore, 4.125 stroke, 6.125 rod 9.5 to 1 Comp with 68cc head (CP Bullets BLS1134-030) |
|---|---|
| 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 BLS1134-030 pistons?
The BLS1134-030 pistons are designed to achieve a compression ratio of 9.5:1 when used with a 68cc cylinder head. Ensure that all components are compatible to maintain this ratio.
What bore and stroke specifications are these pistons designed for?
These pistons are designed for a 4.030-inch bore and a 4.125-inch stroke, making them suitable for a 421 cubic inch LS engine setup.
What type of valve reliefs do the BLS1134-030 pistons have?
The BLS1134-030 pistons feature two valve reliefs, which are essential for clearance with the LS engine's valves during operation.
What is the weight of the BLS1134-030 pistons?
Each BLS1134-030 piston weighs approximately 406 grams. This weight is important for maintaining balance in the rotating assembly.
What is the dish volume of the BLS1134-030 pistons?
The BLS1134-030 pistons have a dish volume of -21.5cc, which contributes to the overall compression ratio when paired with the appropriate cylinder head.
