Chevrolet All LS 15°/L92 4.005 bore, 4.000 stroke, 6.125 rod, 1.110 CH, 1.5mm, 1.5mm, 3.0mm rings (CP Bullets BLS1142-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1142-005 |
|
Bore (in) |
4.005 |
|
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 |
-2.69 |
|
Compression Ratio |
10.8 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
403 |
|
Piston Weight |
452 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevrolet All LS 15°/L92 4.005 bore, 4.000 stroke, 6.125 rod, 1.110 CH, 1.5mm, 1.5mm, 3.0mm rings (CP Bullets BLS1142-005) |
|---|---|
| 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 clearance for the BLS1142-005 pistons?
For the BLS1142-005 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and thermal expansion considerations.
What compression ratio can I expect with the BLS1142-005 pistons in an LS engine?
The BLS1142-005 pistons provide a compression ratio of approximately 10.8:1 when used with standard 68cc L92 cylinder heads. Ensure that your specific setup, including head gasket thickness and combustion chamber modifications, is accounted for to achieve the desired compression.
What type of ring gaps should I set for the BLS1142-005 pistons?
For the BLS1142-005 pistons, it's advisable to set the top ring gap around 0.020" to 0.022" and the second ring gap around 0.018" to 0.020". The oil ring gap should be set to approximately 0.015" to 0.020". Adjustments may be necessary based on your specific application and boost levels.
What is the weight of the BLS1142-005 pistons, and how does it affect engine performance?
The BLS1142-005 pistons weigh 452 grams each. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your connecting rods and crankshaft are rated for the intended RPM and power levels to maintain reliability.
Are there specific machining requirements for the BLS1142-005 pistons?
Yes, the BLS1142-005 pistons may require specific machining such as honing of the cylinder bores to achieve the correct clearance. Additionally, ensure that the piston pin bores are properly sized and that the overall assembly is balanced with the crankshaft for optimal performance.
