What is a 4/71 blower?

The GMC 4-71 diesel engine with corresponding 4-71 blower was frequently used as a truck engine or generator power source or a pump power source. These units are 4.7 Liters, 284 cubic inches, and rated at 121 HP. The 4-71 was/is adapted for use on hot rod engines, Bonneville type cars, etc.

Who made the 671 blower?

Two brothers, Philander and Francis Roots of Connersville, Indiana (no relation to Rootes of Great Britain; note the spelling) initially devised their machine in the 1850s to pump water, but it has countless applications for moving fluids and gasses, from underground mines to blast furnaces.

How much power can a 6-71 blower make?

602 hp
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 many liters is a 8 71 supercharger?

Like how you roots numbers compare to screw. I.e. 6-71 is 3.0 liters or an 8-71 is the same as a 4.0… So let’s say. Most screw type setups are EFI.

Is Dyer’s blowers still in business?

Today, Dyer’s Machine Service Inc is still owned and managed by Gary Dyer. In fact, Gary still hand clearances and assembles a majority of the superchargers that are sold each year by Dyer’s Blowers.

How much horsepower will a blower add?

Usually with a mild blower cam and a larger carburetor you can expect a typical small block to produce anywhere from 360 to 400 streetable horsepower. The addition of a set of good heads can boost this into the 440 to 470 hp range. Torque on an engine of this type typically will be in the 400 to 440 Ib.

How much does a supercharger add to horsepower?

So, on average, a supercharger adds a horsepower boost of about 46 percent of the engine’s original specs.

How do I know if I have a 6-71 blower?

For example, a 6–71 blower is designed to scavenge six cylinders of 71 cubic inches (1,163 cc) each and would be used on a two-stroke diesel of 426 cubic inches (6,981 cc), which is designated a 6–71; the blower takes this same designation.

How much boost can a 8-71 blower make?

Weiand Pro-Street 6-71 and 8-71 supercharger kits come with drive ratios that will typically produce 5 to 7 pounds of boost. These boost levels are based on 350 or 454 cid engines.

Is supercharger safer than turbo?

Centrifugal Supercharger – Looks a lot like a turbo. It’s very efficient but provides the smallest amount of boost. Thanks to that however, it’s safer and less complicated to run than other types. Compared to a turbo that spins at over 150,000 RPM, a centrifugal supercharger spins closer to 50,000 RPM.

How much does a GMC GMC blower cost?

6-71 GMC Blower completely rebuilt and clearanced, a complete drive kit, a real blower manifold, and carburetor adapter (All Polished). Custom kits and prices are available on special request.

Can a dyer’s blower be used on a small block Chevy?

Let us know which options you want for your new kit. Few things carry the WOW factor that a Dyer’s Supercharger does. With these kits, you can add both vintage visual impact and streetable power to your small block Chevy.

What kind of blower do I need for a V8?

It is the perfect choice for V6 and small V8 applications and will replace virtually any 4-71 GM blower. Additionally the BDS 471 features the company’s latest 3-lobe, non-helix, rotor design which allows the blower to push more and cooler air than that produced by its predecessor.

What kind of intake manifold does Dyer’s blowers use?

Cast aluminum 6-71 / 8-71 Weiand intake manifold that features an integral pop-off valve and utilize stock-type thermostats and housings 4-71 Blower Box to 6-71 / 8-71 Intake Adapter plate with countersunk stainless bolts Heavy duty gear cover with pressure relief valve and level plug