Chevy LS3 Flat top -2.7cc All std 15 deg/ L92 4.065 bore, 3.622 stroke, 6.125 rod 10.5 to 1 Comp with 66.5cc head (CP Bullets BLS1121-STD)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1121-STD |
|
Bore (in) |
4.065 |
|
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 |
10.5 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
376 |
|
Piston Weight |
453 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS3 Flat top -2.7cc All std 15 deg/ L92 4.065 bore, 3.622 stroke, 6.125 rod 10.5 to 1 Comp with 66.5cc head (CP Bullets BLS1121-STD) |
|---|---|
| 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 and stroke for the BLS1121-STD pistons?
The BLS1121-STD pistons are designed for a bore of 4.065 inches and a stroke of 3.622 inches, making them suitable for a 376 cubic inch LS engine.
What compression ratio can I expect with the BLS1121-STD pistons?
These pistons provide a compression ratio of 10.5:1 when used with a 66.5cc cylinder head, which is ideal for performance applications.
Do I need to modify my engine for these pistons?
Yes, proper machining is essential. Ensure the bore clearance and ring gaps are set correctly according to your engine build specifications. Additionally, confirm that the valve reliefs align with your camshaft specifications.
What is the weight of the BLS1121-STD pistons?
Each BLS1121-STD piston weighs 453 grams, which is a consideration for balancing the rotating assembly in your LS engine.
What type of ring thickness do these pistons use?
The BLS1121-STD pistons are designed for a ring thickness of 1.5mm for the top and second rings, and 3.0mm for the oil ring, which is standard for performance applications.
