Chevy LS3 Flat top -2.7cc All std 15 deg/ L92 4.070 bore, 4.000 stroke, 6.125 rod 11.6 to 1 Comp with 66cc head (CP Bullets BLS1123-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1123-005 |
|
Bore (in) |
4.07 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.11 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
66 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-2.7 |
|
Compression Ratio |
11.6 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
416 |
|
Piston Weight |
423 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS3 Flat top -2.7cc All std 15 deg/ L92 4.070 bore, 4.000 stroke, 6.125 rod 11.6 to 1 Comp with 66cc head (CP Bullets BLS1123-005) |
|---|---|
| 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 BLS1123-005 pistons?
The BLS1123-005 pistons are designed for a bore size of 4.070 inches. Ensure your engine's cylinder bores are machined to this specification for optimal performance.
What compression ratio can I expect with these pistons?
These pistons provide a compression ratio of 11.6:1 when used with a 66cc cylinder head. However, actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What type of ring thickness do these pistons use?
The BLS1123-005 pistons use a ring thickness of 1.5mm for the top and second rings, and 3.0mm for the oil control ring. Ensure proper ring gap settings are followed for your specific application.
What is the weight of the BLS1123-005 pistons?
Each BLS1123-005 piston weighs 423 grams. This weight should be considered when balancing your rotating assembly to maintain engine performance and reliability.
Are there any specific machining requirements for these pistons?
Yes, the BLS1123-005 pistons may require specific bore clearances and ring gaps to be set by the engine builder. Always consult with your machinist to ensure proper fitment and performance.
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