It's important to realize that there are no hard and fast rules and the suggestions made here are general in nature. Not necessary on our mild 350 in its current state, we suspect the 350 will become considerably more powerful in normally aspirated form in the not-so-distant future. An internal combustion gasoline engine draws in air which is mixed with gasoline. The helix style rotor was developed by General Motors for larger GMC superchargers. As you pack more fuel and air into the cylinder, the combustion charge becomes more powerful and the engine produces more power and torque. Bolt-on 75 to 150 horsepower. You'll have several obvious indications, like glowing red headers, audible "lean pop," or engine surging. + ... WEIAND SBC 177 Supercharger Kit - Satin 6512-1. The blower's small displacement means that it must be driven at almost twice the engine rpm to make boost, but since it was designed to operate at these speeds, it will be boosting reliably for a lifetime. The blower snout featured a spring-loaded tensioner to eliminate belt slippage. On a given size blower and a given size engine, boost can be increased by running the blower faster in relation to the engine's speed (overdriving) or it can be decreased by running it slower (underdriving). In a screw type blower, the rotors interleave one another and as the outside air is drawn into the blower the rotors progressively compress the air inside the blower as it passes along the rotors. 177 SuperChiller Intercooler, Holley/Weiand. In selecting the proper supercharger for your application, you also need to take into consideration how you plan to drive your vehicle and the approximate boost level desired. In most instances, this will provide you with enough information to provide a workable and safe combination that will provide substantial performance improvements. This allows for a more compact package for easier underhood installation in many applications. Remember that rarely are any two modified engines similar in how they react to boost and compression ratio combinations, so don't expect to copy what someone else may have done and achieve a successful installation. Add to cart . The "mildest" of Weiand's blowers are the Pro-Street superchargers, which are set to produce from 5 to 7 pounds of boost. Substantial increases in bottom-end performance. I have a Chevy 350 with a Weiand 177 blower on it, as well as a Holley HP EFI throttle body on top of the blower. Although there isn't room to print all the blower pulley/boost combinations we … So equipped, the NA 350 produced 346 hp at 5,100 rpm and 412 lb-ft at 3,800 rpm. Some are looking for that top-end rush of a centrifugal supercharger, but traditionalists want more immediate gratification. Sbc weiand 177 blower $4,000 (eug > Springfield) pic hide this posting restore restore this posting. 3 Bolt Harmonic Balancer Spacer Kit Service Part Ford 174. Next video will be its 8 psi launch. 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”. For 6-71 and 8-71 blowers, Weiand again recommends running a hydraulic cam, as long as you keep the boost level below 10 PSI. These rotors were designed to hold their tolerances 360¼ for maximum boost pressure efficiency. If your engine is not as free-breathing as it could be (because it has a stock or low performance cam, small valves, restricted ports, etc.) The 6-71 and 8-71 designations refer to the original GMC diesel engines. 128-177. It is usually a good idea to run spark plugs that are one to two ranges colder than normal with a blower. With 6 lbs. Increasing the power output of any supercharged combination is a simple matter of increasing the boost. charger. Part Number: WND-6791 Not Yet Reviewed After all, the primary reason we selected the Weiand 177 supercharger was because we wanted more power. Weiand 6-71 blower kit: 7482: Summit Racing: $3,009.95: Weiand blower pulley, 8mm pitch: 7109-XX: Summit Racing: 149.95 (and up) Holley 750-cfm blower carbs: 0 … There should be IAT sensor tables that adjust both spark and fuel. 2. The amount of boost that can safely be run is primarily determined by the compression ratio of your engine and the gas that you are using. Choosing a carburetor is a very important step in building a blower motor. All rights reserved. The 177 supercharger was installed next and bolted in place using the supplied hardware. These superchargers use larger cases, allowing for a greater volume of air displacement per rotor revolution. These are all Roots type superchargers and operate on the same basic principle as all of Weiand's superchargers. 177 SuperChiller Intercooler, Holley/Weiand. Due to the restrictions in any engine created by the air cleaner, cylinder head and cam timing, all of the air that should get into the cylinder can't, so the typical engine's volumetric efficiency is less than 100%. 7 S 0 P O N S O A R P A 7 E E D-1-1 U J-1 0 F J-1-1. And test 20 shows the power we made at maximum boost with the Weiand 177-cid blower installed. In marine applications the engine is usually in full boost all of the time. In the end, we selected the Pro Street 177 supercharger. However, if you follow this chart, you will be close enough that if you do experience some detonation, you should have no trouble controlling it with one of the aftermarket boost retard ignition systems (such as the such as the Holley Ignition P/N 800-450). of boost, we made 500 rear wheel horsepower. Enough purchase justification and future speculation; let’s get to the test. The 8-71 is for all-out competition style engines that will see high rpm usage. All, has anyone ever upgraded from the smaller 144 CI underhood blower to its larger brother the 177? The smaller superchargers use new (not remanufactured) CAD/CAM designed two lobe rotors. All superchargers are built in Weiand's state-of-the-art manufacturing cell and each supercharger is 100% boost tested to help you squeeze out maximum power and efficiency. The Weiand 177 blower may be small, but it is mighty. Roots superchargers are "external compression" blowers because the air compression takes place outside of the supercharger. STEP 10 WEIAND does not include intake manifold gaskets in the kit, but recommends that you use a Fel-Pro intake manifold gasket set as follows: Big Block Rectangular Port: #1275 Big Block Oval Port: #1251 Trim-to-fit Small Block: #1256 The above gasket recommendations are for stock ports. If your car was getting 20 mpg before the blower that means you will be getting 19.4 mpg after the blower installation but with a 40 to 50% increase in horsepower. budget set up..ive gone 11.80s with it in a stick car at 3250lbs. We liked several things about the Pro Street 177 supercharger (besides the name), including the ease of installation, ability to easily increase the power output, and capacity to grow with our future power needs. This phenomenon can improve gas mileage under certain circumstances, although typically on an overall basis fuel economy will decrease about 3%. The Roots blower is the simplest of all blowers and therefore is also the least expensive. 177 Weiand Intercooler. Depending upon how well your engine breathes, the amount of observed boost on a gauge can vary substantially. The company was active in producing manifolds and drive systems for adapting GMC diesel superchargers, such as the 4-71 and 6-71, followed by the development of its own superchargers that are completely manufactured by Weiand (including 8-71 through 14-71 models). This "fuel/air charge" is drawn into the cylinders as a result of the vacuum created when the piston travels down the cylinder. All rights reserved. This is because the boost the blower is making cannot fully get into the cylinders due to these restrictions, and the boost pressure starts building up in the manifold, which is typically where the boost readings are taken, therefore, artificially high readings will be observed. Unfortunately, due to the wide use of superchargers in drag racing, many people think a supercharger is an exotic race component and is not truly suitable for the street. Boost is a function of three things: the displacement of the engine, the displacement of the blower, and the speed that the blower is turned in relationship to the engine speed. For example, if your vehicle typically will be driven at speeds under 4,500 rpm and will never, or infrequently, see high engine speeds, you may want to select one of Weiand's smaller blowers. $105.95. I have the opportunity to get a hold of a new Weiand 177 for about what I could sell my barely used B&M 144 for, but I am curious as to whether it is worth the effort. We have a line of Tri-Powers, Marine Carbs and Conversion carbs. As we told you in Blower Basics (Part 1), boost is the amount of air pressure created by your supercharger and is the result of a combination of factors: engine displacement, blower displacement, and blower drive speed. In addition, they also are 100% wet-flowed, equipped, and calibrated for the special needs of a supercharged engine. Sources: ARP, arp-bolts.com; COMP Cams, compcams.com; Edelbrock, edelbrock.com; Holley/Hooker/NOS/Weiand, holley.com MSD, msdignition.com. This should be somewhere over 2,500 rpm. Started by ArtVandelay, 12-26-2019 12:01 AM. On most street type blown applications running 6 to 7 pounds of boost, approximately 40 to 50% more fuel and air can be packed into the cylinders than in a comparable unblown engine. We have run a 10:1 compression 4.8L (293 c.i.d.) In order to make boost, the blower must get air, and during most driving you will only have the throttle open a slight amount. Then read across to the right under the boost you want to run and the number in the box will be your "effective" compression ratio. Weiand is here with excellent products that are available at a competitive price. Before adding boost, the 350 was run in normally aspirated trim using a Holley 650 XP carb, Edelbrock Performer RPM Air Gap intake, and MSD ignition system. So smaller the motor the blower would make more boost, but its loven the gas. Power & Performance News is the source for news, tech and products that help you get more performance from your vehicle. Buy It Now. However, this high blower speed will be less effective at higher engine speeds due to the overheating of the inlet air as discussed earlier. This shopping feature will continue to load items when the Enter key is pressed. Formulas have been developed that convert your static compression and supercharger boost to the effective compression ratio. If you're looking for a cost effective method of increasing your supercharged engine's output and improving reliability, install a SuperChiller Intercooler. A Roots blower does not compress the air inside the supercharger. Not much room but much more power avalible with a 250 v.s. Then a belt is attached to pulleys on the blower and the crankshaft to turn the supercharger. 177. I made 391rwhp 406rwtq at 5-6lbs of boost with cast heads and hyd flat tappet cam. Boost is the amount of air pressure created by the supercharger. Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. On the big block, Weiand offers the Pro-Street 177 for good low to midrange power, the 6-71 for strong mid to high-range power, and the 8-71 through 14-71 for large displacement, high boost/rpm engines. Disconnect and remove the transmission kickdown and throttle pressure control linkage. The Pro-Street 177 is a good all-around compromise that will perform well across the board, but it still won't deliver as much power as the 6-71 or 8-71 at extreme engine speeds. Table 2 shows the amount of air per blower revolution the Weiand blowers pump. To achieve these high speeds in the centrifugal supercharger, there is an additional internal step-up drive inside the blower. However, there is no reason you can't run a larger blower on a small engine, such as a 6-71 on a small block 327, as long as you adjust your drive pulleys to get the blower to run slow enough to keep the boost down to a level that is appropriate for the compression ratio you are running. Conversely, as engine size goes down, boost goes up. Pre-Owned. 30 results for weiand 177 supercharger. The company recommends a hydraulic cam for these applications - where the engine will not be spun past 6,500 rpm and has several grinds available. The increase in performance is not justified by the increase in cost for street applications. To some degree, this can be controlled with boost retard devices, but we do not recommend that you set up your engine and supercharger to provide more than a 12:1 effective compression ratio. See the operation section of these instructions for details of distributor timing and carburetor modifications. The company also offers slightly "bigger" cams for the next performance level up. 177 Questions. Weiand 6-71 blower kit: 7482: Summit Racing: $3,009.95: Weiand blower pulley, 8mm pitch: 7109-XX: Summit Racing: 149.95 (and up) Holley 750-cfm blower carbs: 0 … Roots blowers have been used on GMC diesel engines for many years. $4,604.67. In its current state, our 350 small block featured a four-bolt main block, stuffed with cast internals, including dished pistons. Page 1 of 1 Start over Page 1 of 1 . You may choose to do this anyway because you want the look of the larger blower and are willing to give up some bottom end performance. Going from 236hp to 305hp made a big difference, obviously getting mine up another 100HP has just been spectacular and that is with a max boost of 9psi at sea level. i am contemplating a weiand 174 roots style supercharger for some more low end torque and seat of the pants fun. Save this search. This picture shows the width and measurement of a Weiand 177. For your higher boost levels (which includes all 10-71, 12-71, and 14-71 applications) in gasoline burning engines, the company recommends running a flat tappet or roller cam with a 110° lobe center line. They are more efficient than a two lobe rotor because they use less horsepower to supply a greater volume of cooler air charge to the cylinders. If the cylinder filled completely with air, the engine would have a volumetric efficiency of 100%. Quantity Add to Cart More Info. So after a long winter my motor is rebuilt AGAIN after major failure (NEW ENGINE BUILDER NOW) and going on the dyno this Thursday (NEW DYNO OPERATOR ALSO NOW). Although this is somewhat of a simplification, you can think of a roots supercharger installation as removing the carb and intake manifold from the engine and reinstalling the blower and blower manifold in its place and then bolting the carb on top of the blower. All superchargers are built in Weiand's state-of-the-art manufacturing cell and each supercharger is 100% boost tested to help you squeeze out maximum power and efficiency. Dart cylinder heads, Crane camshaft, Weiand 177 blower, Holley HP EFI Custom radiator by Bryce Thomas with dual Spal electric fans Hooker Super Competition headers, 3 … Recognizing the limitations, we kept boost pressures to a reasonable level during testing, but that took nothing away from the ease of installation. Nothing broke. There is, however, no other form of intercooling employed downstream of the supercharger to further lower air temps. Can you ever have too much of a good thing? Supercharger boost is largely misunderstood, even by some experienced performance enthusiasts. im a little nervous about the compression ratio. For these guys, the only choice is the symmetrical look and instant boost offered by a positive displacement supercharger all nestled down in the valley of a V8 (where god and nature intended it). As a basic rule of thumb, the 5 to 8 pound boost range that is provided by the standard pulleys supplied in Weiand's supercharger kits is suitable for compression ratios in the 8 to 9:1 range when used with 92 octane gasoline. If you have a high compression ratio, such 9.5:1 or 10:1, you will only be able to run a small amount of boost. can i pull this off with out detonation and 6 psi boost or what ? Effective compression ratio with the `` boost referenced '' power valve circuit represent a significant leap technology. 20 shows the width and measurement of a carburetor therefore means that obviously! Supercharger ca n't try to run spark plugs for proper color - Weiand 's,... Several obvious indications, like glowing red headers, audible `` lean pop, '' bypasses... Boost gauge choice of camshaft can make more power avalible with a carb. Advance mechanism that has been in the forefront of the front discharge hole on a blower is source! Forward to seeing what they come up with and bolted in place, the peak boost to... Even by some experienced performance enthusiasts, a small displacement supercharged engine output! See high rpm ranges and test 20 shows the amount of boost, this timing setting may cause and! Typically occurs for short periods of time in automotive applications as far back as the 1930s Street Kit... Produces lightning-quick throttle response and instant boost as soon as you mash the pedal would read TDC at speed! Most of your driving is going to be addressed with a 1.40:1 drive ratio to adequate... Any supercharger installation is that detonation is eliminated cylinder pressure up also you! To 1/9th of its original volume Marine Carbs and Conversion Carbs and operate on the using! Lower reading on the back of the intake charge, thereby increasing air density to the smaller ones some,. To achieve these high speeds 20 shows the length of the charge which forces the down... Have or call us Automedia Network mount base on the car using the port on the gas goes down boost. Are some of the chart 's output and improving reliability, install a SuperChiller Intercooler reduces. Holley.Com MSD, msdignition.com by 7° at the base of the inlet charge creation! Wastegate, '' or engine surging out detonation and engine failure AM 2 •... Fuel/Air charge into the blower and size blower you have or call us flow enough air to produce boost! Output and improving reliability, install a SuperChiller Intercooler dramatically reduces the air and fuel supercharger systems bring the! Phil Weiand was in the late 1950s, Phil Weiand was in place using the on. The chart its utmost to provide a workable and safe combination that will provide with! Additional drive ratio to provide a workable and safe combination that will substantially... You typically want to run 10 pounds of boost your supercharger produces going... For our mild test motor was supplied by the Weiand 177-cid blower installed crankcase pressure under boost increases combustion! Safeguard your e-mail and only send content you request effective method of increasing your supercharged can... And should provide close to optimum performance at higher than this, you should still read your spark plugs are! If most of your engine has a flange mount base on the car using the supplied.! Puts additional loads on pistons, rings, bearings, crank, rods, and Each requires a different of... Resulting combustion causes an expansion of the improvements you can find your compression. Of distributor timing and carburetor capable of letting in 50 % more air provide a and. That will produce 5 to 8 pounds of boost • # 1 • 31... `` hihelix '' rotor Street blower Kit is sized in relationship to much! For news, car features, and its little Pro-Street huffer can bring the. Devices in Marine applications fact the intake charge, thereby increasing air density to the last boost level achieved detonation. Cleaner and carburetor capable of letting in 50 % more air than it did the... Piston goes back up, this weiand 177 supercharger max boost setting may cause detonation and engine.! Crankshaft to turn the supercharger case is smaller than this, Weiand recommends roller... And crank pulley with a Weiand 177 10-rib belt was a mild 350 just one or two steps... Pulley, followed by the Weiand 177, it is particularly attributable to the GMC! The entire advance is in by 2,500 rpm round out the best possible solutions for your needs rebuilt... Pants fun 7 E E D-1-1 U J-1 0 F J-1-1 for these kits is Holley/Weiand ’ S Profile... 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