Chevy LS2 Flat top -2.7cc All std 15 deg/ L92 4.030 bore, 4.000 stroke, 6.125 rod 11.1 to 1 Comp with 68cc head (CP Bullets BLS1142-030)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1142-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.11 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-2.7 |
|
Compression Ratio |
11 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
408 |
|
Piston Weight |
452 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 Flat top -2.7cc All std 15 deg/ L92 4.030 bore, 4.000 stroke, 6.125 rod 11.1 to 1 Comp with 68cc head (CP Bullets BLS1142-030) |
|---|---|
| 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 bore size for the BLS1142-030 pistons?
The BLS1142-030 pistons are designed for a bore size of 4.030 inches. Ensure your engine block is machined to this specification for proper fitment.
What compression ratio can I expect with these pistons and a 68cc head?
With the BLS1142-030 pistons and a 68cc cylinder head, you will achieve a compression ratio of approximately 11.1:1. This ratio is suitable for performance applications but requires careful tuning and quality fuel.
What is the pin size for the BLS1142-030 pistons?
The BLS1142-030 pistons feature a pin size of .927 inches with a length of 2.250 inches. Ensure your conrods are compatible with this pin specification.
Do I need to modify my engine for valve clearance with these pistons?
Yes, the BLS1142-030 pistons come with two valve reliefs, but it's crucial to check valve clearance during assembly. Machining may be necessary depending on your specific camshaft and head configuration.
What is the weight of the BLS1142-030 pistons, and how does it affect engine performance?
The BLS1142-030 pistons weigh 452 grams each. Lighter pistons can improve engine response and reduce stress on the rotating assembly, but ensure your engine is balanced accordingly for optimal performance.
