Chevrolet 409ci LS L92 4.030 bore 1.115 CH 4.000 stroke 6.125 rod 13:1 CR with 68cc head (CP Bullets BLS1133-030)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLS1133-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
10 |
|
Compression Ratio |
13.1 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.190 / SP |
|
Cubic Inch |
408 |
|
Piston Weight |
462 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevrolet 409ci LS L92 4.030 bore 1.115 CH 4.000 stroke 6.125 rod 13:1 CR with 68cc head (CP Bullets BLS1133-030) |
|---|---|
| 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 BLS1133-030 pistons?
For the BLS1133-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and reduces the risk of piston seizure.
What compression ratio can I expect with the BLS1133-030 pistons and 68cc heads?
The BLS1133-030 pistons are designed to achieve a compression ratio of 13.1:1 when used with 68cc L92 heads. Ensure that your engine is tuned accordingly to handle this compression.
What type of fuel is recommended for an engine using BLS1133-030 pistons?
Due to the high compression ratio of 13.1:1, it is recommended to use high-octane fuel, such as 98 RON or higher, to prevent knocking and ensure optimal performance.
What is the weight of the BLS1133-030 pistons, and how does it affect engine performance?
The BLS1133-030 pistons weigh 462 grams each. Lighter pistons can improve engine response and RPM capabilities, but ensure your rotating assembly is balanced to maintain reliability.
Do the BLS1133-030 pistons require any specific machining before installation?
Yes, the BLS1133-030 pistons may require specific machining for bore clearance and ring gap settings based on your engine's specifications. Always consult with your engine builder for precise requirements.
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