Chevrolet LS All 15°/L92 heads, 4.070 bore, 4.000 stroke, 6.125 rod, 1.110 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1123-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLSR1123-005 |
|
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 |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
416 |
|
Piston Weight |
423 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevrolet LS All 15°/L92 heads, 4.070 bore, 4.000 stroke, 6.125 rod, 1.110 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1123-005) |
|---|---|
| Brands | CP Carrillo |
| Engine | GM / LS |
| Make | Chevrolet, GM, Holden, LS Chev |
Delivery & Freight
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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 CP Bullets BLSR1123-005 pistons?
For the CP Bullets BLSR1123-005 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this may vary based on your specific engine build and operating conditions, so always consult with your engine builder for precise requirements.
What compression ratio can I expect with these pistons in an LS engine?
The CP Bullets BLSR1123-005 pistons provide a compression ratio of approximately 11.6:1 when used with standard 66cc L92 heads. Keep in mind that actual compression may vary based on head gasket thickness and any modifications to the combustion chamber.
What type of ring gaps should I use with the 1.2mm rings on these pistons?
For the 1.2mm rings on the CP Bullets BLSR1123-005 pistons, a general guideline is to set the top ring gap around 0.020" to 0.022" and the second ring gap around 0.018" to 0.020". Adjustments may be necessary based on your specific application and boost levels.
Do I need to modify the valve reliefs for my specific LS engine setup?
The CP Bullets BLSR1123-005 pistons come with two valve reliefs designed for standard LS applications. However, if you are using aftermarket camshafts with different lift profiles, you may need to check clearances and potentially modify the reliefs to ensure proper valve clearance.
What is the weight of the CP Bullets BLSR1123-005 pistons, and how does it affect my engine build?
The CP Bullets BLSR1123-005 pistons weigh 423 grams each. This weight is suitable for high-performance applications, but keep in mind that lighter pistons can improve engine response and reduce stress on the rotating assembly. Always consider the overall balance of your engine when selecting components.
