Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.120 CH, -4.6cc Flat Top 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1204-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1204-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
Head Type |
LS7 |
|
Head CC |
70 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-4.6 |
|
Compression Ratio |
11.2 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
484 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.120 CH, -4.6cc Flat Top 1.5mm, 1.5mm, 3mm rings (CP Bullets BLS1204-010) |
|---|---|
| Brands | CP Carrillo |
| Engine | GM / LS |
| Make | Chevrolet, GM, Holden, LS Chev |
Delivery & Freight
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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 BLS1204-010 pistons?
For the BLS1204-010 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined by the engine builder based on specific application and tolerances.
What compression ratio can I expect with the BLS1204-010 pistons in an LS7 engine?
The BLS1204-010 pistons provide a compression ratio of approximately 11.2:1 when used with LS7 heads that have a 70cc chamber. Ensure that all components are compatible to achieve this ratio.
What type of rings are included with the BLS1204-010 pistons?
The BLS1204-010 pistons come with a ring set consisting of 1.5mm x 1.5mm x 3.0mm rings. Ensure proper installation and gap settings for optimal performance.
Are the BLS1204-010 pistons suitable for high boost applications?
The BLS1204-010 pistons can handle moderate boost levels, but reliability will depend on proper tuning, fuel quality, and engine assembly. Always consult with an experienced engine builder for specific boost applications.
What is the weight of the BLS1204-010 pistons and how does it affect performance?
The BLS1204-010 pistons weigh 484 grams. Lighter pistons can improve engine response and reduce stress on the rotating assembly, but ensure that the entire rotating assembly is balanced for optimal performance.
