Chevy LS3 Dome +9.5cc All std 15 deg/ L92 4.065 bore, 4.125 stroke, 6.125 rod 13.5 to 1 Comp with 68cc head (CP Bullets BLS1129-STD)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1129-STD |
|
Bore (in) |
4.065 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.05 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
9.5 |
|
Compression Ratio |
13.5 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.200 / SP |
|
Cubic Inch |
428 |
|
Piston Weight |
448 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS3 Dome +9.5cc All std 15 deg/ L92 4.065 bore, 4.125 stroke, 6.125 rod 13.5 to 1 Comp with 68cc head (CP Bullets BLS1129-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 compression ratio for the BLS1129-STD pistons?
The BLS1129-STD pistons are designed for a compression ratio of 13.5:1 when used with a 68cc head. Ensure that your engine build accounts for this ratio to achieve optimal performance.
What bore and stroke specifications are compatible with the BLS1129-STD pistons?
These pistons are designed for a bore of 4.065 inches and a stroke of 4.125 inches, making them suitable for a 428 cubic inch LS engine setup.
What type of valve reliefs do the BLS1129-STD pistons have?
The BLS1129-STD pistons feature two valve reliefs, which are necessary for clearance with the LS engine's valve train. Ensure your cylinder heads and camshaft are compatible.
What is the weight of the BLS1129-STD pistons, and how does it affect engine performance?
The BLS1129-STD pistons weigh 448 grams. While lighter pistons can improve throttle response and reduce overall rotating mass, ensure that your engine balance and assembly are properly managed.
What are the ring thickness specifications for the BLS1129-STD pistons?
The BLS1129-STD pistons use a ring thickness of 1.5mm for both the top and second rings, and a 3.0mm oil ring. Proper ring gap and clearance should be set according to your engine's specific requirements.
