Chevy LS2 AFR LS3 12° -3.8cc Flat Top 4.030 bore 1.110 CH 4.000 stroke 6.125 rod with 68cc head (CP Bullets BLS1151-030)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1151-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.11 |
|
Head Type |
AFR LS3 12 * |
|
Head CC |
68 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-3.8 |
|
Compression Ratio |
11.1 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.200 / SP |
|
Cubic Inch |
408 |
|
Piston Weight |
458 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS2 AFR LS3 12° -3.8cc Flat Top 4.030 bore 1.110 CH 4.000 stroke 6.125 rod with 68cc head (CP Bullets BLS1151-030) |
|---|---|
| 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 clearance for the BLS1151-030 pistons?
For the BLS1151-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on the specific application and the builder's preferences, so always consult with your engine builder for the best fit.
What compression ratio can I expect with the BLS1151-030 pistons and 68cc heads?
The BLS1151-030 pistons are designed to achieve a compression ratio of approximately 11.1:1 when used with 68cc AFR LS3 heads. Keep in mind that actual compression may vary based on factors like head gasket thickness and combustion chamber modifications.
Do I need to machine the BLS1151-030 pistons for my LS engine?
Yes, the BLS1151-030 pistons may require specific machining, such as honing of the pin bores or adjustments to the ring lands, depending on your engine's setup and tolerances. Always verify with your engine builder for precise requirements.
What type of connecting rods should I use with the BLS1151-030 pistons?
The BLS1151-030 pistons are designed for use with a 6.125" connecting rod length. Ensure that your connecting rods are compatible with the LS engine and can handle the expected power levels for your build.
What is the weight of the BLS1151-030 pistons and how does it affect performance?
The BLS1151-030 pistons weigh 458 grams each. While this weight is typical for performance applications, lighter pistons can improve throttle response and reduce reciprocating mass. Consider your overall engine balance and performance goals when selecting pistons.
