Chevy LS -20cc Dish All 15°/L92 4.005 bore 1.110 CH 4.000 stroke 6.125 rod 9:2 CR with 68cc head (CP Bullets BLS1146-005)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1146-005 |
|
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 |
-0.138 |
|
Dom/Dish CC |
-20 |
|
Compression Ratio |
9.2 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.200 / SP |
|
Cubic Inch |
403 |
|
Piston Weight |
415 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS -20cc Dish All 15°/L92 4.005 bore 1.110 CH 4.000 stroke 6.125 rod 9:2 CR with 68cc head (CP Bullets BLS1146-005) |
|---|---|
| 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 compression ratio for the BLS1146-005 pistons?
The BLS1146-005 pistons are designed to achieve a compression ratio of 9.2:1 when used with a 68cc head. Ensure that your engine's setup matches these specifications for optimal performance.
What bore size is required for the BLS1146-005 pistons?
These pistons are designed for a bore size of 4.005 inches. Proper machining of the cylinder bore is essential to ensure correct fitment and performance.
What type of ring thickness do the BLS1146-005 pistons use?
The BLS1146-005 pistons utilise a ring thickness of 1.5mm for the top and second rings, and 3.0mm for the oil ring. Make sure to set the ring gaps according to your engine's specifications.
What is the weight of the BLS1146-005 pistons?
Each BLS1146-005 piston weighs 415 grams. This weight should be considered when balancing the rotating assembly to ensure smooth operation at high RPMs.
Do the BLS1146-005 pistons come with valve reliefs?
Yes, the BLS1146-005 pistons feature two valve reliefs. This design helps accommodate valve clearance in LS engines, but always verify clearances during assembly.
