Chevy LS2 Flat top -2.7cc All std 15 deg/ L92 4.070 bore, 4.125 stroke, 6.125 rod 11.7 to 1 Comp with 68cc head (CP Bullets BLS1132-070)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1132-070 |
|
Bore (in) |
4.07 |
|
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 |
FT |
|
Dom/Dish CC |
-2.7 |
|
Compression Ratio |
11.7 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
449 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 Flat top -2.7cc All std 15 deg/ L92 4.070 bore, 4.125 stroke, 6.125 rod 11.7 to 1 Comp with 68cc head (CP Bullets BLS1132-070) |
|---|---|
| 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 and stroke for the BLS1132-070 pistons?
The BLS1132-070 pistons are designed for a bore of 4.070 inches and a stroke of 4.125 inches, making them suitable for LS engines with these specifications.
What is the compression ratio when using BLS1132-070 pistons with 68cc heads?
When paired with 68cc heads, the BLS1132-070 pistons achieve a compression ratio of 11.7:1. Ensure that your engine build is compatible with this compression for optimal performance.
What type of valve reliefs do the BLS1132-070 pistons have?
The BLS1132-070 pistons feature two valve reliefs, which are designed to accommodate typical LS valve configurations. Always verify clearance with your specific setup.
What is the pin size and length for the BLS1132-070 pistons?
The BLS1132-070 pistons use a pin size of .927 inches and a length of 2.250 inches. Ensure that your conrods are compatible with these specifications for proper fitment.
What is the weight of the BLS1132-070 pistons?
Each BLS1132-070 piston weighs 449 grams. This weight should be considered when balancing the rotating assembly for your engine build.
