How much HP does a 671 blower add?

Driven 11 percent under, the 6-71 produced a boost curve that began at 4.2 psi at 3,300 rpm and rose to 8.3 psi at 6,400 rpm. This pulley combination produced peak power numbers of 602 hp at 6,400 rpm and 551 lb-ft of torque at 4,700 rpm.

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.

What is supercharger compression ratio?

The optimum compression ratio is 8.0:1. Higher than 8.0:1 is not necessary or recommended. Fuel, ignition timing, and total boost could become critical factors.

How much does a 6-71 blower weigh?

128 pounds
Technical Details

Manufacturer	‎Weiand
Brand	‎Weiand
Model	‎Weiand 6-71 Blower Kit, Sbc .5 Pitch, Polished
Item Weight	‎128 pounds
Item model number	‎7582P

How much boost can a 6-71 blower make?

So equipped, the 6-71 supplied a peak boost reading of just 4.1 psi, allowing the blown big-block to produce 545 hp and 527 lb-ft of torque. Stepping blower speed up slightly by replacing the crank pulley with a slightly larger 55-tooth version resulted in a jump in boost pressure to 5.5 psi.

How many cubic inches is a 671 blower?

426 cubic inches
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.

How much boost can a 6 71 blower make?

How much horsepower does a 871 blower add?

The boost supplied by the 8-71 increased the peak power output from 651 hp to 898 hp and torque from 579 lbs. ft. to 764 lbs ft.

Whats the best compression for boost?

A compression ratio of 8 is recommended for pump gas applications (91-93 octane). Boost levels of 8-10 psi are recommended between 5:1 and 9:1. When you use higher octane fuel, you will be able to boost your engine’s performance by approximately 1 psi per point of octane.

Why is it called a 6-71 blower?

In GMC diesel nomenclature, 6 represents the number of cylinders, while 71 represents the cubic-inch displacement per cylinder. So the displacement here is 426 cubic inches, and that is the approximate displacement of the blower as well.

Is supercharger safer than Turbo?

Superchargers are arguably more reliable than turbochargers. They’re easy to install and maintain. They’re louder than turbochargers—they enhance the RPMs by a considerable amount—and they’re also more common as a result.

How much HP does a blower add?

Blowers make horsepower and lots more torque than a standard engine. The amount of extra horsepower really depends on what your engine is like. On a 350 Chev, Weiand estimates an extra 100-120hp with one of its low-blow superchargers on an otherwise stock motor.

What does 6 71 mean on a supercharger?

How much HP can a 8-71 blower make?

5. The biggest chunk of aluminum was, of course, the polished 8-71 from The Blower Shop. Capable of supporting over 1,000 hp on the right combination, the 8-71 looked right at home on the BPE 540. 6.

Does high compression make more power?

Higher compression ratios and combustion efficiency mean more power with less fuel, and fewer exhaust gases. On the other hand, the more violent ignitions intensify heat, friction, and wear, making it tough on the engine’s internal components.

How much HP do high compression pistons add?

The generally accepted gauge for adding compression is that one full point of compression can add between 3 to 4 percent power. So, if an engine is making 50 horsepower and we add a full point of compression (from 11 to 12:1 for example), this could potentially push the power to 51.5 horsepower.

How much horsepower will a blower add?

Why do superchargers whine?

Superchargers are driven by a belt connected to the engine crankshaft. This means that they spin at a high rate of speed, which can create a whining noise. Another reason for the characteristic supercharger whine is because of the way air moves through them.

Which is better supercharger or blower?

One of the best ways to get there is with a supercharger. There’s no better way to draw a crowd around your car than with a blower sticking through the hood. If monster power is your goal, a supercharger can deliver instant horsepower. But beyond the cosmetic value, there’s much more to superchargers than just hot air.