Chevy LS7 12° Heads 4.135 bore, 4.000 stroke, 6.125 rod, 1.120 CH, -4.6cc Flat Top 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1204-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1204-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.12 |
|
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 |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.220 / -.161 |
|
Cubic Inch |
430 |
|
Piston Weight |
472 |
|
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 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1204-010) |
|---|---|
| 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 compression ratio for the BLSR1204-010 pistons?
The BLSR1204-010 pistons are designed to achieve a compression ratio of approximately 11.2:1 when used with LS7 cylinder heads that have a 70cc combustion chamber. Ensure that your engine's overall assembly and tuning are optimised for this compression ratio.
What are the specific ring thicknesses for the BLSR1204-010 pistons?
The BLSR1204-010 pistons come with a ring package of 1.2mm for both the top and second rings, and a 3.0mm oil control ring. It's crucial to set the ring gaps according to your specific application and boost levels.
What is the pin size and length for the BLSR1204-010 pistons?
The BLSR1204-010 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 BLSR1204-010 pistons?
Each BLSR1204-010 piston weighs approximately 472 grams. When building your engine, consider this weight in relation to your rotating assembly for balance and performance.
Do the BLSR1204-010 pistons have valve reliefs?
Yes, the BLSR1204-010 pistons feature two valve reliefs. This design is intended to accommodate LS7 cylinder head configurations, but always verify clearances during assembly to avoid interference.
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