Chevy LS All 15°/L92 heads, 4.070 bore, 3.622 stroke, 6.125 rods, 1.305 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1121-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLSR1121-005 |
|
Bore (in) |
4.07 |
|
Stroke (in) |
3.622 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.305 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
66.5 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-2.7 |
|
Compression Ratio |
10.6 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
377 |
|
Piston Weight |
454 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy LS All 15°/L92 heads, 4.070 bore, 3.622 stroke, 6.125 rods, 1.305 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1121-005) |
|---|---|
| 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 BLSR1121-005 pistons?
The recommended bore clearance for the BLSR1121-005 pistons is typically between 0.0030" to 0.0035". However, final clearance should be determined based on your specific engine build and intended use.
What type of fuel is suitable for the compression ratio of 10.6 with these pistons?
With a compression ratio of 10.6, it is advisable to use premium unleaded fuel with an octane rating of at least 98 RON to prevent knocking, especially under high load conditions.
What machining processes are necessary before installing the BLSR1121-005 pistons?
Before installation, ensure that the cylinder bores are properly honed to match the piston dimensions and that ring gaps are set according to your engine's specifications. Additionally, check for any necessary balancing of the rotating assembly.
Can I use these pistons with aftermarket cylinder heads?
Yes, the BLSR1121-005 pistons are designed to work with standard 15°/L92 heads. However, if using aftermarket heads, ensure that the valve reliefs are compatible and that the overall geometry is suitable for your specific setup.
What is the significance of the gas port feature on these pistons?
The gas port feature on the BLSR1121-005 pistons helps improve ring seal and reduces the risk of ring flutter at high RPMs. This is particularly beneficial for high-performance applications where maintaining consistent cylinder pressure is critical.
