Chevy LS2 Flat top -3.8cc All std 15 deg/ L92 4.130 bore, 4.000 stroke, 6.125 rod 11.4 to 1 Comp with 70cc head (CP Bullets BLS1113-130)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1113-130 |
|
Bore (in) |
4.13 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
70 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-3.8 |
|
Compression Ratio |
11.3 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.200 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
428 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 Flat top -3.8cc All std 15 deg/ L92 4.130 bore, 4.000 stroke, 6.125 rod 11.4 to 1 Comp with 70cc head (CP Bullets BLS1113-130) |
|---|---|
| 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 are the recommended bore and stroke specifications for the BLS1113-130 pistons?
The BLS1113-130 pistons are designed for a 4.130-inch bore and a 4.000-inch stroke. Ensure these specifications are met for optimal performance.
What is the compression ratio when using the BLS1113-130 pistons with 70cc heads?
When paired with 70cc cylinder heads, the BLS1113-130 pistons yield a compression ratio of approximately 11.4:1. This ratio is suitable for performance applications, but ensure your fuel quality and tuning are appropriate.
What is the weight of the BLS1113-130 pistons and how does it affect engine balance?
Each BLS1113-130 piston weighs 428 grams. When building your engine, consider this weight in conjunction with the entire rotating assembly to maintain proper balance and minimise vibrations.
Do the BLS1113-130 pistons require any specific machining before installation?
Yes, the BLS1113-130 pistons may require specific bore clearances and ring gap settings based on your engine's specifications. Always consult with your engine builder to ensure proper fitment.
What type of valve reliefs do the BLS1113-130 pistons have?
The BLS1113-130 pistons feature two valve reliefs, which are designed to accommodate typical LS engine valve sizes. Ensure your valve train setup is compatible to avoid interference.
