Chevy LS7 Dish -25cc All 12 deg LS7/ 4.125 bore, 4.000 stroke, 6.125 rod 9.1 to 1 Comp with 70cc head (CP Bullets BLS1203-STD)
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 |
BLS1203-STD |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.125 |
|
Comp Height |
1.115 |
|
Head Type |
LS7 |
|
Head CC |
70 |
|
Dome / Dish Height |
-0.163 |
|
Dom/Dish CC |
-25.12 |
|
Compression Ratio |
9 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.220 / -.161 |
|
Cubic Inch |
427 |
|
Piston Weight |
449 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Chevy LS7 Dish -25cc All 12 deg LS7/ 4.125 bore, 4.000 stroke, 6.125 rod 9.1 to 1 Comp with 70cc head (CP Bullets BLS1203-STD) |
|---|---|
| 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 BLS1203-STD pistons?
The BLS1203-STD pistons are designed for a compression ratio of 9.1 to 1 when used with a 70cc LS7 cylinder head. Ensure that your engine's setup, including bore size and head specifications, aligns with this ratio for optimal performance.
What machining considerations should I keep in mind when using these pistons?
When installing the BLS1203-STD pistons, ensure that the bore clearance is set correctly according to your engine's specifications. Additionally, check the ring gaps and adjust them based on your specific application and expected operating conditions.
What is the weight of the BLS1203-STD pistons, and how does it affect performance?
The BLS1203-STD pistons weigh 449 grams each. This weight is suitable for high-performance applications, but consider the overall rotating assembly balance and engine RPM range to maintain reliability and performance.
Are there specific valve reliefs on the BLS1203-STD pistons?
Yes, the BLS1203-STD pistons feature two valve reliefs. Ensure that your camshaft specifications and valve lift do not interfere with these reliefs to avoid potential engine damage.
What type of pin is used with the BLS1203-STD pistons?
The BLS1203-STD pistons use a pin size of .927 x 2.250 inches. Make sure to verify compatibility with your connecting rods and ensure proper fitment during assembly.
