Chevy LS7 12° Heads 4.155 bore, 4.125 stroke, 6.125 rod, 1.055 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1201-030)
For shipping cost -add all the products you would like, then navigate to the shopping cart to calculate shipping quote.
|
Make |
Chevrolet |
|
Engine Type |
LS7 Series |
|
Part Number |
BLSR1201-030 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
4.125 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.055 |
|
Head Type |
LS7 |
|
Head CC |
66.5 |
|
Dome / Dish Height |
0.175 |
|
Dom/Dish CC |
5 |
|
Compression Ratio |
13.5 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.220 / SP |
|
Cubic Inch |
447 |
|
Piston Weight |
485 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy LS7 12° Heads 4.155 bore, 4.125 stroke, 6.125 rod, 1.055 CH, +5cc dome 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1201-030) |
|---|---|
| Brands | CP Carrillo |
| Engine | GM / LS |
| Make | Chevrolet, GM, Holden, LS Chev |
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
You can calculate shipping rates inside the shopping cart. After adding all the products you would like, navigate to the cart and click the ESTIMATE SHIPPING & TAX link. .
If you only see the Click and Collect shipping option, it means that your address was not validated correctly.
If you have issues calculating freight, please get in touch. We are happy to help.
Disclaimer:
Product images are for description purposes only. Actual product may vary.
Shipping calculations available at checkout.
If you are unsure, get in touch by emailing [email protected], messaging us on Facebook, or phoning us at +61 7 5645 1333 (8am to 2pm AET).
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 BLSR1201-030 pistons?
The BLSR1201-030 pistons are designed for a compression ratio of 13.5:1 when used with LS7 cylinder heads. Ensure your engine build accounts for this ratio to achieve optimal performance.
What type of ring gaps should I use for the 1.2mm rings on these pistons?
For the 1.2mm rings on the BLSR1201-030 pistons, the ring gaps should be set according to your specific application and boost levels. Generally, a gap of 0.0045" to 0.0050" per inch of bore is a good starting point, but always consult with your engine builder for precise specifications.
What is the pin size and length for the BLSR1201-030 pistons?
The BLSR1201-030 pistons feature a pin size of 0.927 inches and a length of 2.250 inches. Ensure your connecting rods are compatible with these specifications for proper fitment.
What machining considerations should I keep in mind when using these pistons?
When using the BLSR1201-030 pistons, it's crucial to ensure the correct bore clearance and ring gap settings are achieved. Additionally, verify that the piston-to-valve clearance is adequate, especially with the two valve reliefs designed into the pistons.
What is the weight of the BLSR1201-030 pistons, and how does it affect performance?
The BLSR1201-030 pistons weigh 485 grams each. While lighter pistons can improve throttle response and reduce reciprocating mass, ensure your rotating assembly is balanced correctly to maintain engine reliability and performance.
