## How much HP does a Weiand supercharger add?

Using the supplied 3-inch blower pulley and 6-inch crank pulley, the Weiand 177 supercharger produced a peak of 6.3 psi and increased the power output of the 350 to 405 hp and 446 lb-ft of torque.

## How do I identify my Weiand blower?

On Weiand’s smaller blowers, the number represents the volume of air in cubic inches that the blowers move per revolution. For example, the144 series blower produces 144 ci of air per revolution. On the company’s larger 6-71 and 8-71 blowers, the number refers to the original GMC labeling scheme.

**How do I know what blower I have?**

1. Blower Identification Plate. When your blower originally shipped from the manufacturer it would have an identification plate with information about the unit.

**How do I know what size blower I need?**

End of dialog window. The 177 or 250 number is the measurement of air in cubic inches that the blower pushes through in one rotation. A 671 pushes through 426 cubic inches. Ok, so a 420 mega Blower is the same as a 671.

### What do blower numbers mean?

“That blower had a 15-inch long rotor. From that day forward, a 15-inch rotor blower is called a 6-71, a 16-inch long rotor is called an 8-71, and a 19-inch long rotor is a 14-71 blower. As you can see, the bigger the number, the longer the rotor, and the more power it will make.” The Screw Blower.

### How many liters is a 671 blower?

The GMC 6-71 diesel engine with corresponding 6-71 blower was frequently used as a truck engine, marine engine, or generator power source or a pump power source. These units are 7.0 Liters, 426 cubic inches, and rated at 190 HP. The case and rotor length for the 6-71 blower is 15.0 inches.

**What kind of oil does a Roots blower take?**

ROOTS™ Synthetic Oil

The recommended oil for all Roots’ products is ROOTS™ Synthetic Oil. It is a long life, high film strength, energy efficient, synthetic lubricant that significantly increases bearing life and equipment reliability.

**Why choose the Weiand 177 supercharger?**

After all, the primary reason we selected the Weiand 177 supercharger was because we wanted more power. In its current state, our 350 small block featured a four-bolt main block, stuffed with cast internals, including dished pistons.

#### How much power does a Weber 177 supercharger make?

So equipped, the supercharged small block produced 452 hp and 492 lb-ft of torque. Using the supplied 3-inch blower pulley and 6-inch crank pulley, the Weiand 177 supercharger produced a peak of 6.3 psi and increased the power output of the 350 to 405 hp and 446 lb-ft of torque.

#### What size pulley do I need for a 177 supercharger?

Using the supplied 3-inch blower pulley and 6-inch crank pulley, the Weiand 177 supercharger produced a peak of 6.3 psi and increased the power output of the 350 to 405 hp and 446 lb-ft of torque. Stepping up to a 7.0-inch crank pulley resulted in a jump to 452 hp and 492 lb-ft of torque.

**What is the difference between a 6-71 and 177 supercharger?**

The 177 Supercharger is very similar to the 6-71 series in style but the 177 is a compact version, allowing you to fit this supercharger under most medium sized cowl induction hoods on trucks and muscle cars. The 177 Series superchargers are engineered to produce 25-40% more power while maintaining excellent drivability!