Chevrolet LS All 15°/L92 heads, 4.070 bore, 3.622 stroke, 6.125 rod, 1.300 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1135-070)
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|
Make |
Chevrolet |
|
Engine Type |
LS Series |
|
Part Number |
BLSR1135-070 |
|
Bore (in) |
4.07 |
|
Stroke (in) |
3.622 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.3 |
|
Head Type |
Std 15 deg/ L92 |
|
Head CC |
68 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-2.7 |
|
Compression Ratio |
10.3 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.175 / SP |
|
Cubic Inch |
377 |
|
Piston Weight |
491 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevrolet LS All 15°/L92 heads, 4.070 bore, 3.622 stroke, 6.125 rod, 1.300 CH, 1.2mm, 1.2mm, 3.0mm rings (CP Bullets BLSR1135-070) |
|---|---|
| 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 BLSR1135-070 pistons?
For the BLSR1135-070 pistons, a typical bore clearance of 0.0020" to 0.0025" is recommended. However, final clearance should be determined by the engine builder based on specific application and operating conditions.
What compression ratio can I expect with the BLSR1135-070 pistons in an LS engine?
The BLSR1135-070 pistons yield a compression ratio of approximately 10.3:1 when used with standard 68cc L92 heads. Keep in mind that actual compression may vary based on head gasket thickness and other factors.
What type of ring gaps should I set for the BLSR1135-070 pistons?
For the BLSR1135-070 pistons, a common starting point for ring gaps is 0.020" for the top rings and 0.022" for the second rings. Adjustments may be necessary based on your specific application and boost levels.
Can I use the BLSR1135-070 pistons with a stock LS crankshaft?
Yes, the BLSR1135-070 pistons are designed to work with a stock LS crankshaft, provided the stroke and rod length are compatible. Ensure proper machining and clearances are maintained for optimal performance.
What is the weight of the BLSR1135-070 pistons and how does it affect performance?
The BLSR1135-070 pistons weigh 491 grams. While lighter pistons can improve throttle response and reduce reciprocating mass, it's essential to balance them with the entire rotating assembly for reliability and performance.
