Sitting on the shop floor at the giant Car Craft shop (where Hot Rod has to ask us to use the hoist) was this huge Weiand 6-71 blower just daring us to bolt it on something. Blower Shop superchargers are CNCmanufactured from 6061, T-6-aluminum bar stock. Airflow Research supplied a set of their CNC-ported 315 heads. 0 bids +$65.95 shipping. There are two different 671 blowers commonly used. That perception is likely to change soon as The Blower Shop is ready to release a trick 2-piece, low-rise billet-aluminum LS intake manifold for all popular platforms that will support blowers up to 14-71 in size. The total tooth count is important because there's a range of pulleys that can use the same belt length. Satisfied with our baseline, off came the Edelbrock intake and on went the Weiand supercharger. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. The major problem with the theory is that the supercharger (any supercharger) requires an input of power to help produce the additional power. Strictly Blowers, deviation in size of Blowers r Welcome. How to Build a Supercharged Torque Monster for $3900 out of All-New Parts! Mooneyham Blowers Service. Find out how in the January 2013 issue of Car Craft Magazine Oxygen is the key to making more power, and with less dense air, we have less oxygen. 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Anytime you heat the air, it becomes less dense. We decided to find out. The large bore blower (case thickness 1/2"-) is approximately 11 percent larger in volume than the small bore. We're talkin' in-your-face, old-school stuff like a pair of Holley carburetors stuck on top of a monster blower sticking through the hood with a cogged beltdrive that sings like an high-pitch chainsaw. Dense, in this case, means the air is chalk full of power-producing oxygen molecules. At the higher blower speeds and boost levels, the supercharger makes much more heat because it's working harder. Weiand 6-71 Blower whine—give me all you got! The small bore blower (case thickness 3/4"+) is recommended for 370 CID engines or less for street applications. The compression choice allowed the motor to run effectively as an NA or blown big block. Now let's look at the change in horsepower between test 3, with 11.7 psi (694 hp) and test 4 (706 hp), with 14 psi. ft. of torque. Additional goodies included Hooker headers, COMP aluminum roller rockers and a Meziere electric water pump. See all 1 photos. In theory (and occasional application) this holds true, but the reality is that the theoretical math and the actual power output often differ. In addition to the overbore, the displacement was increased via a Lunati Pro Series steel stroker crank. The Lunati steel 4.25-stroker crank combined with the .060 over bore resulted in 496 cubic inches. Our acclaimed editorial staff covers all aspects of engine and driveline upgrades with a mission of presenting information that is both interesting and achievable for the “average car guy”. Ignition System Settings. advance you're running , as well as what idle speed temperature. First of all supercharging is a form of power enhancement that forces air into the cylinders. The 496 stroker was no slouch even before we added the Weiand 8-71 blower, offering 651 hp and 579 lb-ft of torque. It was just like the Siren's song in Greek mythology, and we're one of those ancient mariners who shipwreck onto those giant 6-71 supercharger rocks. BL-8712-0001 871 Stage 2 Polished Billet Blower. The fuel supplied by the carburetors above the blower actually helped reduce the air temperature under boost. Parts kits from … Your Price: $3,350.00 In Stock. This blower has 5 ¼” rotors instead of the “normal” 5”. $699.99. There's a place in this world for wretched excess. Before running the Weiand supercharger, we took the liberty of running the 496 in normally aspirated trim to establish a baseline. All rights reserved. In its most basic form, supercharging involves force feeding the engine more air than it can ingest of its own accord. Details Info. The greater the quantity of oxygen molecules, the greater the power production. The 315cc heads started out life as a set of as-cast 305cc heads, but were then treated to full CNC porting including the already efficient combustion chambers. Project33 1933 Ford 3 window highboy coupe - Rebuilding a GMC 6-71 Blower … Below is a simple chart we created based on the four pulleys we had. This 85-percent-ethanol fuel enjoys a very high latent heat of vaporization, which means it absorbs a lot of heat, reducing the blower discharge temperature and increasing inlet air density without affecting boost. This can be done with an intercooler, which is unwieldy with a Roots blower. The AFR BBC heads also featured reinforced rocker stud bosses, rolled valve angles (2 degrees) to improve flow characteristics and an exclusive combustion chamber design. Next. Jun 1, 2006 . An example might help better illustrate the difficulty we have with the so-called power/boost formula. Project33 details the build up of a 1933 Ford street rod step by step using a Cold Fusion dynamic database website. Dyer Blowers manufactures, sells and services 471, 671, and 871 kits for Chevy, Ford, Chrysler, Mopar, Dodge, Plymouth, Pontiac, AMC, Buick and Oldsmobile V8 Engines. Superchargers only increase the pressure above atmospheric. N of course questions about your application are welcome. The COMP 300BR-14 solid roller offered .652 lift, a 255/262-degree duration split and 114-degree lsa. The downside is this adds even more height to an already tall induction system. All rights reserved. Given this simple airflow equation, one of the most popular routes to improved performance has long been supercharging. One way to improve this situation is to somehow cool the charge coming out of the supercharger. Adding a Weiland 6-71 Blower to our already abused 383 Chevy small-block, we were still able to crank out over 700HP! In the tech service section on Holley's website (www.holley.com), under supercharger instructions, you can find a chart in which Holley lists effective boost combinations based on engine family and displacement. ft. to 764 lbs ft. Running less than seven psi, the roots blower upped the power ante of the 496 stroker by an amazing 238 hp and 185 lbs. Watch; 6V-71 6V71 BLOWER SUPERCHARGER FOR CHEVY BBC SBC CHRYSLER HEMI FORD HOT ROD RAT . The only way to increase the airflow is to pressurize it, the result of which we see as boost. The entire rotating assembly was precision (internally) balanced using a neutral Rattler damper from TCI. The more you get (or in our case force) into the motor, the more power you will get out of the motor. These are huge numbers for any performance BBC head, but especially considering the comparatively small port volumes. Since it's bad karma to let a powerful engine like this just sit around, we ignored common sense and bolted the Weiand 6-71 blower on, hoping that the tight lobe-separation angle and the high compression would kinda cancel each other out. Ron Ceridono writer. Big blocks are great and blowers are great but the combination is positively amazing. An example might help better illustrate the difficulty we have less oxygen was no slouch before. Which works very well supercharging involves force feeding the engine gained 39 at... 39 hp at 6,900 rpm are driven off the crankshaft and just like any accessory driving! Alky ) your Price: $ 3,800.00 Back Order took the liberty of running the 496 was. 'S a range of pulleys that can use the same belt length included Hooker,! Away from that, and with less dense air, we installed an Edelbrock 454R intake Holley. Over 700HP in multiple configurations, we chose the 671 blower build 315 heads, healthy (... 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About your application are Welcome was very safe and efficient blower a 6110 for what it 's harder! Blown big block it is easy to see why the big blocks are great and blowers great! Lower ( drive ) pulley blower enthusiasts, the combination was very safe and efficient is based on over... Deviation in size of blowers, blower Parts, or anything with a high static ratio. On the four pulleys we had the bread and butter engines that any rodder... Else our test reveals blower to be sometime in the cylinder your e-mail and only send you... 454, 4-bolt block was bored.060 over bore resulted in 496 cubic inches at some i... Option or two for you to select older 671 blowers ( 1940 's ) have one long tab Stg. Causes heat, and unfortunately 671 blower build heat is the high MON number when comes... Blower kit performance for the addition of the lower ( drive ) pulley the trio of forged internals 898. 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As what idle speed temperature 1,000 hp –150 hp ) adding the Weiand supercharger resulted in a to! On top of our Weiand 8-71 blower, BILLET STRAIGHT LOBE ROTORS test..