Chevy LS7 Flat Top -4.6cc All 12 deg LS7/ 4.135 bore, 4.000 stroke, 6.077 rod 11.3 to 1 Comp with 70cc head (CP Bullets BLS1202-010)
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|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLS1202-010 |
|
Bore (in) |
4.135 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.077 |
|
Comp Height |
1.163 |
|
Head Type |
LS7 |
|
Head CC |
70 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-4.6 |
|
Compression Ratio |
11.3 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
429 |
|
Piston Weight |
457 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Flat Top -4.6cc All 12 deg LS7/ 4.135 bore, 4.000 stroke, 6.077 rod 11.3 to 1 Comp with 70cc head (CP Bullets BLS1202-010) |
|---|---|
| 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 and stroke for the BLS1202-010 pistons?
The BLS1202-010 pistons are designed for a 4.135 inch bore and a 4.000 inch stroke, making them suitable for LS7 applications.
What compression ratio can I expect with these pistons?
These pistons provide a compression ratio of 11.3:1 when used with 70cc LS7 cylinder heads.
What is the piston weight for the BLS1202-010?
The BLS1202-010 pistons have a weight of 457 grams, which is important to consider for balancing the rotating assembly.
Do I need to modify the cylinder head for valve clearance with these pistons?
The BLS1202-010 pistons feature two valve reliefs, but it's essential to check for adequate clearance based on your specific camshaft and head configuration.
What is the pin size and length for the BLS1202-010 pistons?
The BLS1202-010 pistons use a pin size of .927 inches and a pin length of 2.250 inches, which should be compatible with standard LS7 connecting rods.
