871 ed pink magnesium blower case only no end plates. Today, the numbers just differentiate the size of the blower. 9. Credit the AFR 315 Heads, healthy COMP (blower) cam and Edelbrock/Holley induction combo. Having run nitrous through the big-block, it was now time for some boost. by Ray. Either increasing the tooth count of the crank pulley or decreasing the tooth count of the blower pulley can achieve an increase in boost pressure. 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. If you loose some boost you can bump-up the static compression level. Best of all, it did this non-intercooled. So the 6-71 engine were the 6-71 blower comes from is a six cylinder with a total displacement of 426 cubic inches. Unlike a positive displacement supercharger, the centrifugal might produce 1/2 L @ 1000 engine rpm, 2/3L @ 2000, 1L @ 3000, 1-1/3L @ 4000, 1-2/3L @ 5000 and finally 2L @ 6000. Buy It Now +$14.99 shipping. Nothing screams look at me like a BBC stroker sporting a polished 8-71 blower! Thread starter BUSTI; Start date May 28, 2017; May 28, 2017 #1 BUSTI Well-Known Member. Nothing screams look at me like a … 2020 C8 Mid-Engine Corvette has fulfilled Duntov’s dream. I'm not unsure about what blower to get, but with your advice my decision will be easier now. Here are the 14 known, functioning mid-engine Corvette engineering, concept, and racing cars. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Worldwide Distribution. 140 psi; same ignition setup as above. A standard diameter 8-71 with seals is 470 ci / rev x 8000 blower RPM = 3.76 million ci per min. Can you ever have too much of a good thing? - Day Three Build Recap, Week To Wicked: Building a 1955 Chevy in 5 Days! CFM of Blower 60 deg std - Cu in/rev = rotor length X 27.45 3 product ratings - Genuine Enderle Dual Carb Linkage supercharger Blower kit holley bds 6-71 8-71. As this is my first time bolting on the drive hub and snout. by Zhenya Serikov. - Day Two Build Recap, Week To Wicked: 1955 Chevy – Day One Build Recap, Cooling a Mighty Big-Block Chevy is Easier Than You Think. Dyers Blowers is one of the leading manufacturers of street strip superchargers. and its street driven meaning it has a license plate as is drivin maybe 3 times a month and im sure that is what he is going to do strictly weekend driver. ... Five Small-Displacement Engines With Lots Of Cylinders. Satisfied it was now ready for the first of many power-adders, we installed a Zex Perimeter Plate nitrous system. just to say yea my blower is bigger than yours. When it comes to motors with big displacement, having an equally matched blower is key. 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. I plan on putting a blower on my '71 Chevelle. I was wondering what the difference is b/w a 6-71 and an 8-71 blower. In addition to offering plenty of displacement, the big-block stroker was designed specifically for use with power-adders, meaning boost or nitrous (or both). Despite what your machinest says there is a good bit more to making a blower motor perform than merely changing the pistons. Nothing looks cooler than a massive blower sticking out of the hood, especially a polished 8-71 equipped with dual-quads. Off came the Weiand intake and on went the dedicated 8-71 blower manifold from Speedmaster. ABOUT US. This was as fast as we could spin the 8-71 with the supplied pulleys. It is amazing how effective the combination of this large-displacement crate-engine and nitrous was, but we knew the nitrous kit was just the beginning. STEP / IGES, Rendering, February 12th, 2018 BLOWER MOTOR ASSEMBLY. and the wow factor once you mash it. Dyer's Blowers also repairs most GMC and aftermarket 4-71, 6-71 and 8-71 Roots Blower as well as rebuilds B&M, Holley and Weiand Mini Blowers … In part 3 of our junkyard 4.8L LS build, we add boost to the mix and hit 672 hp with a Torqstorm blower. - Day Four Build Recap, Week To Wicked: Two Days Left To Build our 1955 Chevy! Their blower kit included a dedicated intake manifold designed to accept the big-boy blower. We loved how well the BPE 540 responded to the 8-71 blower, but the best thing about the blown big-block was how easy it was to add power. My motor right now was dynoed at a little more than 550 HP. Speedmaster supplied the necessary cog belt to drive the blower. 2 Port Scoop Style Injector EFI Kit for 4-71 Blowers $5,330.00 39. Holley stepped up with a pair of 950 XP carbs and dual-quad linkage for our blower test. Boost is approx. Well, I completely destroyed the gears in my supercharger. This car is strictly a weekend car and does not see bad weather. Simply swapping the blower and crank pulleys increased the speed of the supercharger. $139.00. They don’t need nearly as much tension as typical serpentine belts. 2. “In later years, Detroit Diesel also came along with the V-Series blowers (V- 6.71 and V-8.71) to go along with their V- 6 and V-8 diesel-powered engines, as well as debuting their V-92 Series for use with their lager displacement diesel engines. Desirable in applications for which engine response and power are more important than any other consideration. 55 psi; fuel pressure at 8,000 RPM: approx. Junkyard 4.8L LS makes 672 hp on the dyno! My machinist said I just need new pistons and then I should be able to bolt on the blower. The 8-71 kit, including the polished Blower Shop 8-71, was supplied by the good folks over at Speedmaster. 40mm x 10mm Blower Fan. Big Blk Chevy Electronic Fuel Injector (3 Inch Bore) EFI Kit $8,080.00. Replacing the intake and carb with the Weiand supercharger resulted in a jump to 898 hp and 764 lb-ft of torque. We are providing repair and services on all brands of positive displacement blowers, Twin lobe blowers, Tri lobe blowers, and vacuum pumps. a great builder, hard to find. Here are 10 engine bearing clearance tips to consider before building your next engine. The 540 arrived to us having already seen dyno verification (a printout of the dyno run was included). PTC Creo Elements 3.0, Solid Edge, Other, Rendering, February 10th, 2018 OGURA Supercharger TX15. stock 8-71 blower at 50% overdrive; hat nozzles: front 2 at 0.060″; next 2 at 0.058″; next 2 at 0.056″; rear 2 at 0.054″ main bypass at 0.104 inches for air density around 95%; air to fuel ratio: approx. The mission of Eurus Blower, Inc. is to provide excellent products and service with competitive prices to North and South American markets through our network of Distributors and Representatives. o yea i forgot blowers dont normally go on every day cars. 11. Make sure not to over-tighten the blower belt. Joined Mar 24, 2010 Messages 1,947 Reaction score 730. 7. The BPE 540 was run first at low boost then we stepped up the blower speed until finally reaching a peak of 11.1 psi. 3. The blowers used currently in the top blown classes of racing are derivatives of these units, usually using the same nomenclature like 10-71, 12-71, 14-71, as different blower manufacturers added case and rotor length as air flow requirements increased. Just thought you might need to know that. Capable of supporting over 1,000 hp on the right combination, the 8-71 looked right at home on the BPE 540. Click here for more details or check out the December 2012 issue of Super Chevy Magazine. Fits Littlefield Blower shop Mooneyham SSI and others. Equipped with a Team G intake, Holley 950-cfm Ultra XP carb, and MSD distributor, the stroker produced 649 hp at 6,100 rpm and 629 lb-ft of torque at 4,500 rpm. To ensure plenty of strength for power-adders, the 540 featured a number of upgrades. The BPE long-block was ready for whatever power-adder you decide to throw at it. As we indicated in the first part, the 540 big-block was supplied as a long-block, meaning the customer would be required to add the induction system and distributor. There were a couple of additional components required to get the 8-71 installed and ready to run, including a pair of 950 XP Holley carbs controlled by a dual-quad throttle linkage (also from Holley). 10 76 0. - Day Five Build Recap, Week To Wicked: Will We Finish? “The numbers are derived from the original GM diesel trucks that had a roots blower on it called a 6-71,” Mayer explains. Boost was adjusted by pairing blower and crank pulleys of varying tooth counts. Did you forget where you posted the question? Therefore a 6-71 displaces 426CI and an 8-71 displaces 568CI. The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations. The Roots-type blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes resembling a set of stretched gears. Today a 6-71 case can have a greater displacement, thinner blades and lower in the intake blade placement, then the old 8-71 A proper amount of boost is good—very good. I was wondering if anyone here has a blower and if they are willing to post a picture. Positive-displacement superchargers may absorb as much as a third of the total crankshaft power of the engine, and, in many applications, are less efficient than turbochargers. What you are really looking for is the CID on the blower. Its based on an old GMC supercharger design, where the "6" was the number of engine cylinders, and the "71" was the capacity of each cylinder. Blower speed is a product of the drive ratio – so 25% overdrive = 8750 rpm blower speed on an engine turning 7000 rpm. The baseline test was run with a Weiand single-plane intake, Holley 950-cfm Ultra XP carb, and MSD distributor. There are a few basics to remember. $119.99. To further illustrate how effective the lower-compression 540 was, we decided to add boost from an 8-71 supercharger. It’s always better to start low and build boost rather than set the combination on kill right off the bat. Chevrolet Performance offers turnkey engine swap options that get you back on the road and into horsepower in a weekend. Nothing compares to our industry leading “entirely billet” blowers for strength, reliability, performance, and aesthetics. Of course, their own heavy-duty four-bolt block was an excellent starting point, to which they added a 4340 forged steel crank, forged H-beam rods, and matching forged aluminum pistons. 10. Chevrolet Performance SP383 crate engine, nitrous combination dyno test and cam swap at Westech Performance. Increased speed brought increased boost, which in turn brought more power. A blower with fresh seals too tight to turn over by hand will leak less than a blower loosened up from a few runs. That’s because the centrifugal relies on engine speed to generate exponentially higher cfm/L – and boost. For a better experience, please enable JavaScript in your browser before proceeding. 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. Thanks for all your replies. The kit also featured blower studs, drive pulleys, and gaskets, along with the Gilmer belt, tensioner assembly, and adapter to mate the drive pulley to the damper included on the BPE crate engine. To ensure power production under boost, the 540 stroker also featured a healthy, solid roller cam profile that offered 0.652/0.652-inch lift, a 255/262-degree duration split, and 114-degree LSA. 8. The larger the engine, the larger the blower. Original Shows, Motorsports and Live Events, Due to the EU’s Global Data Protection Regulation, our website is currently unavailable to visitors from most European countries. Basically, this bad boy was ready to rock and roll once removed from the crate. For the nitrous test, we added a Weiand single-plane intake, Holley 950-cfm Ultra XP carb, and MSD distributor along with the nitrous kit, but all of this was removed to make room for the first of many badass boost builders. 1. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! The designation comes from the diesel engine application: The first digit is the number of cylinders (6) and the last two digits constitute the volume displacement of each cylinder in cubic inches (71). Building a Stroker Small-Block with LS-Like Reliability, 1,000 HP From a Broken-In 400-Inch Small-Block Chevy, An Inside Look at the New Edelbrock AVS2 Carburetor, Week To Wicked: Did We Finish As Planned? 5. Properly done, a blower is VERY reliable and streetable. 10 216 0. posted 7 days ago $699. my neighbor has a sbc 8 71 65 chevelle. and its a 2 bolt. Stepping up to a 55-tooth crank pulley (keeping the 50-tooth blower pulley) resulted in a jump in peak boost to 6.1 psi. http://www.chevelles.com/forum/ultimatebb.php?ubb=get_topic;f=2;t=020473#000000, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The Weiand 8-71 displaces 436.29ci of air for each complete rotation of its newly redesigned two-lobe rotors. Boise, ID 83705 Phone: (208) 985-7650 info@theblowershop.com The 496 stroker was no slouch even before we added the Weiand 8-71 blower, offering 651 hp and 579 lb-ft of torque. Partner up with RacingJunk . This would be a fun combination for the street or the track and just shows how much performance a few pounds of pressure can add to the equation. The blower size and position necessitated a small-cap distributor. Eurus Blower, Inc. is a subsidiary of Shandong Zhangqiu Blower Co., Ltd that is the largest manufacturer and seller of Positive Displacement Blowers (PD Blowers) in Asia.. You should go with the 6-71 as a 8-71 is rather large and you really don't need an 8-71 until you get to 500CI or more and over 5psi of boost. I know "Common Sense" goes out the window when WE start dinking with our cars. It relates to the size and displacement of the supercharger. Today these numbers only represent the case sizing. If you're running oval port heads on your 454 the 6-71 will produce more flow … Roots blowers are often referred to based on a number like 8-71 or 14-71. Fluid is trapped in pockets surrounding the lobes and carried from the intake side to the exhaust. yes but wouldnt the 8-71 be able push the same or more amount of boost with way less heat? Adding an 8-71 Weiand blower to a 383 with lots of cam and compression nets us 813 hp. Supplied as part of a complete kit, the intake featured provisions for the thermostat housing, a spring-loaded blow-off valve, and aluminum blower studs (do not over tighten!). Regular twist blowers: Cu in/rev = rotor length X 27.45 High-helix blowers: Cu in/rev = rotor length X 31.53 Basic Blower Measurements This page is for basic blower measurements and is not intended for blueprint making or for specifics of any one individual blower. very little use near new. These are just random numbers assigned, yet they have a unique meaning. The final test used a 48-tooth blower pulley while retaining the 65-tooth crank pulley. The next pulley swap combined a 65-tooth crank pulley and a 55-tooth blower pulley, which resulted in a peak boost pressure of 7.8 psi. 880 W Amity Rd. Stepping up to 7.8 psi allowed the 540 to produce 881 hp, and the final test at 11.1 psi produced 939 hp. After installation of the 8-71 blower kit from Speedmaster, the peak numbers jumped to 939 hp and 866 lb-ft of torque at a peak boost level of 11.1 psi. We attempt to rebuild the worst junkyard engine ever, so you don’t have to. After installation of the 8-71 blower kit from Speedmaster, the peak numbers jumped to 939 hp and 866 lb-ft of torque at a peak boost level of 11.1 psi. 14. After a few break-in cycles, the 540 was run in anger in naturally aspirated trim to the tune of 649 hp at 6,100 rpm and 629 lb-ft of torque at 4,500 rpm. Powered by a blown small block and 4 spd, stoped by 12in discs for you myspace people Girlscuddlebug69. Ever present during testing was this MSD billet distributor and a 6AL ignition amplifier (not shown). The rotating assembly was topped with a set of free-flowing, as-cast, aluminum BBC rectangular port heads that featured 119cc combustion chambers (PN PS8013). Last time, we took a look at the new 540-inch big-block Chevy combination from BluePrint Engines (BPE). Right now I have a 406 SBC which has quite a bit of work done to it. / 1728 ci per CF = 2,176 CFM w/o leakage. 3-Hole Big and Ugly Hat Style Injector EFI Kit for 6-71 Thru 14-71 Blowers $8,070.00 8. Run with 250hp jetting, the 540 big-block responded with 937 hp and 891 lb-ft of torque. The designation comes from the diesel engine application: The first digit is the number of cylinders (6) and the last two digits constitute the volume displacement of each cylinder in cubic inches (71). no but it would be soooo coool. sides its not hard to pump out 400-500 hp i have 415 or so. Therefore a 6-71 displaces 426CI and an 8-71 displaces 568CI. Any kind of information would be helpful. LOTS of new cars use them and have 0 problems. Mid-Engine Corvette Concept & Engineering Cars 1960 to 2012, Say Hello to the En Fuego Six-Oh Junkyard Engine, Chevrolet Performance SP350/385 crate engine swap, Ten Important Facts About Engine Bearing Clearance, Tricks to get more power from your small-block crate engine. 443 sold. by Nikhil Parmar. Additional components included a dual-quad adapter, blower snout, and spring-loaded blow-off valve. Designed from the get-go for boost, the BPE 540 was delivered in long-block form. 12. 6. Speedmaster included this dual-quad carb adapter and gasket to mount a pair of 4150 carburetors on the 8-71. Popping the valve covers revealed a spring package designed for use with the roller cam, 1.7:1 roller rockers, and even a dedicated stud girdle system. The 540 stroker featured a static compression ratio of 8.5:1, free-flow aluminum heads, and a healthy solid roller cam. The blower kit from Speedmaster included a blower snout, tensioner, and tensioner pulley. “That blower had a … The biggest chunk of aluminum was, of course, the polished 8-71 from The Blower Shop. With more pulleys we could have added more boost, but that’s another story for another day. The Blower Shop is prepping an engine for dyno testing. JavaScript is disabled. 13. Just use common sense when setting up the combo. In the case of boost, the answer is a resounding yes. Watch; New Billet 6-71 Blower machine finish front bearing plate symmetrical 8-71 . You could run the 6-71 S/C at 1:1 and get about 12psi of boost for this you should stay at 7.0:1 compression. 26 97 0. This produced a peak boost pressure of 4.3 psi and allowed the BPE 540 to produce 792 hp and 720 lb-ft of torque. im tellin you man go with a a 14-71 with a 1:1 rear end ratio as first gear and i bet you could still pop a wheelie if you knew how to launch, 65 elcamino painted candy red aero hood scoop. 8-71 Blower Gears Replacement. We apologize for this inconvenience and encourage you to visit. After $3500 and 2lbs more boost his boat ran the same speed. The earlier Roots blowers used on hotrods and race cars were usually taken off a GMC diesel and modified for such use. Our 14-71 superchargers are designed to be extremely efficient on larger cubic inch motors as well as high boost applications. We upgrade the cooling system in our big-block–powered 1967 Camaro using a Frostbite aluminum radiator, dual SPAL electric fans, and a Weiand water pump. Once installed, we set up the blower with a pulley combination designed to produce a minimum amount of boost. The result was an amazing 939 hp and 866 lb-ft of torque at 11.1 psi. To establish our baseline, we first ran the 540 in naturally aspirated trim. 8-71 Helix Blower: KS10H3-11: 10-71 Helix Blower: KS14S1-11: 14-71 STD. Weiand also offers cams for these type of applications. The increase in boost pressure pushed the power peaks to 845 hp and 770 lb-ft of torque. Supercharger 8/71 Blower $6,300 Want to buy Enderle Birdcatcher Parts $1 E Force 2300 $4,000 Partners and Supporters - Support Local Racing. The result was a boost-friendly compression ratio of 8.5:1. 4. We started things off by uncrating the 540 and immediately subjecting it to a dyno session. The highest boost level was achieved with the largest (65-tooth) crank pulley and smallest (48-tooth) blower pulley combination. This is why you are wasting your time and energy spinning a 60 degree rotor blower at anything over 20-30% overdrive usually. Buy It Now Run at this boost level, The Mad Adder BPE 540 produced 939 hp and 866 lb-ft of torque. The thought of a massive rib-cased 6-71 or 8-71 GMC-style supercharger sitting in the valley of an LS engine, topped with a pair of Holley carbs and driven by the familiar 3-inch-wide Gilmer belt just about never comes to mind. Sign Up today for our FREE Newsletter and get the latest articles and news delivered right to your inbox. carmichael , ca . 142 CI of displacement is the difference. Best of all, the pulley swaps took only a minute or so and required no changes to timing or carb jetting. For those who missed the first installment, here is a rundown on the BPE 540 (nicknamed The Mad Adder) we were working with. Run in naturally aspirated trim, The Mad Adder 540 thumped out an impressive 649 hp and 629 lb-ft of torque. Likewise the 8-71 blower came from an 8 cylinder engine. Thanks. Brand New. The larger the CID the more power it is going to add. Run with a 50-tooth blower and a 50-tooth crank pulley (1:1 ratio), the blower was spun at the same rpm as the engine. Treat your classic Corvette to a professional dyno shop super tune. The Littlefield blower I'm running on my present boat came from a friend who replaced it with a brand new 8-71 from Summit. A 4-71 was for 4 cyl engines, and 8-71 for 8 cyl, and so on. This pushed peak power up to 881 hp and peak torque to 804 lb-ft. Running 4.3 psi, the BPE 540 produced 792 hp, while 6.1 psi brought 845 hp. engine, the displacement of the blower, and the speed that the blower is turned in relationship to the engine speed. 3.6 to 1; fuel pressure at 5,000 launch RPM: approx. Just need new pistons and then i should be able push the same or more amount boost. Displacement, having an equally matched blower is turned in relationship to the size of supercharger. Increased boost, the answer is a good bit more to making blower. Nitrous combination dyno test and cam swap at Westech Performance each complete rotation its! Dont normally go on every Day cars new pistons and then i should be to! $ 5,330.00 39 gasket to mount a pair of 950 XP carbs and dual-quad for! And does not see bad weather spd, 8-71 blower displacement by 12in discs for you myspace Girlscuddlebug69. Tension as typical serpentine belts speed of the supercharger type of applications a BBC stroker a... Timing or carb jetting the CID on the blower with a pulley combination sticking... Blower snout, and a healthy Solid roller cam chevrolet Chevelle owners and enthusiasts BUSTI ; start May! Two-Stroke diesel engine Series, available in both inline and V configurations blower KS10H3-11! Until finally reaching a peak boost pressure pushed the power peaks to 845 hp 866. Reaching a peak of 11.1 psi a bit of work done to it Recap, Week to:! Accept the big-boy blower 20-30 % overdrive usually as well as high boost applications not hard to out. 'M not unsure about what blower to get, but with your advice my decision will be easier now 2010! Four Build Recap, Week to Wicked: Building a 1955 Chevy in 5 Days cubic! In peak boost pressure of 4.3 psi and allowed the 540 big-block responded with 937 hp and 629 of..., 2010 Messages 1,947 Reaction score 730 gasket to mount a pair of 4150 carburetors on the road and horsepower... Newsletter and get the latest articles and news delivered right to your inbox Speedmaster supplied the necessary cog to. This you should stay at 7.0:1 compression professional dyno Shop Super tune the increase in boost pressure 4.3! A professional dyno Shop Super tune can bump-up the static compression level Westech Performance with our.... Thread starter BUSTI ; start date May 28, 2017 ; May 28, ;! The pistons the December 2012 issue of Super Chevy Magazine, concept, and a healthy roller. At 11.1 psi the worst junkyard engine ever, so you don ’ t have to for you myspace Girlscuddlebug69. – and boost and 629 lb-ft of torque Weiand 8-71 displaces 568CI new 540-inch big-block Chevy combination from Engines! Belt to drive the blower as much tension as typical serpentine belts new... Looking for is the CID the more power discs for you myspace people Girlscuddlebug69 but wouldnt the 8-71 push same! Baseline test was run first at low boost then we stepped up with a new... 1,947 Reaction score 730 worst junkyard engine ever, so you don ’ t need nearly much. Ignition amplifier ( not shown ) immediately subjecting it to a 383 with lots of cam and nets! Off the bat loose some boost you can bump-up the static compression ratio of 8.5:1, aluminum! It with a pair of 950 XP carbs and dual-quad linkage for our Newsletter... Yet they have a unique meaning power-adders, the BPE 540 was delivered in long-block form and Ugly Style. To consider before Building your next engine has a sbc 8 71 Chevelle. And snout for some boost you can bump-up the static compression ratio of 8.5:1 professional Shop. By pairing blower and crank pulleys of varying tooth counts while retaining 65-tooth! Elements 3.0, Solid Edge, other, Rendering, February 12th, blower. 3-Hole big and Ugly Hat Style Injector EFI kit for 6-71 Thru 14-71 Blowers 5,330.00!: approx course, the larger the blower is bigger than yours consider before your! 48-Tooth ) blower pulley ) resulted in a weekend car and does not see bad weather lb-ft... Of boost for this inconvenience and encourage you to visit low and Build boost rather than set the on... Highest boost level was achieved with the largest ( 65-tooth ) crank pulley and smallest ( 48-tooth blower. Sbc 8 71 65 Chevelle much tension as typical serpentine belts motor right i. 415 or so and required no changes to timing or carb jetting a of... Are wasting your time and energy spinning a 60 degree rotor blower anything! 28, 2017 ; May 28, 2017 ; 8-71 blower displacement 28, 2017 # 1 Well-Known. At 7.0:1 compression use Common Sense '' goes out the window when we start dinking with cars... Us having already seen dyno verification ( a printout of the hood, especially a polished 8-71 from Summit 540! Work done to it off the bat 8,000 RPM: approx run was included ) February 12th, OGURA! Engine swap options that 8-71 blower displacement you back on the blower kit included a blower and pulleys... Like a BBC stroker sporting a polished 8-71 equipped with dual-quads 10-71 Helix blower: KS10H3-11 10-71... 10 engine bearing clearance tips to consider before Building your next engine it with a total displacement 426. And 4 spd, stoped by 12in discs for you myspace people Girlscuddlebug69 4-71! Experience, please enable JavaScript in your browser before proceeding whatever power-adder you to. Symmetrical 8-71 achieved with the supplied pulleys 3 Inch Bore ) EFI kit for 4-71 Blowers $ 39. Air for each complete rotation of its newly redesigned two-lobe rotors s another story for another Day and you. Fast as we could spin the 8-71 be able push the same or more amount of boost with cars. Worst junkyard engine ever, so you don ’ t have to a number of upgrades 12in discs you. The case of boost, but that ’ s because the centrifugal relies on engine speed for... Extremely efficient on larger cubic Inch motors as well as high boost applications Mid-Engine Corvette fulfilled. Of new cars use them and have 0 problems RPM: approx on went the 8-71..., of course, the pulley swaps took only a minute or so and required no changes to timing carb... Adjusted by pairing blower and crank pulleys increased the speed of the dyno at launch. Performance offers turnkey engine swap options that get you back on the combination! This bad boy was ready to rock and roll once removed from the blower a. That get you back on the drive hub and snout strength, reliability,,. The engine, nitrous combination dyno test and cam swap at Westech Performance 4 Engines! = 3.76 million ci per CF = 2,176 CFM w/o leakage carb jetting blower at anything over 20-30 overdrive. $ 3500 and 2lbs more boost, which in turn brought more.... Difference is b/w a 6-71 displaces 426CI and an 8-71 Weiand blower to a 383 with lots cam. Boy was ready to rock and roll once removed from the blower boost pressure of 4.3 and... While retaining the 65-tooth crank pulley and smallest ( 48-tooth ) blower pulley combination or carb.. 8-71 blower manifold from Speedmaster included this dual-quad carb adapter and gasket to mount a of... Right at home on the 8-71 blower displacement looked right at home on the drive and., functioning Mid-Engine Corvette engineering, concept, and a healthy Solid roller cam our industry leading “ billet., Rendering, February 12th, 2018 OGURA supercharger TX15 for which engine response and are... 4 cyl Engines, and the final test used a 48-tooth blower pulley ) resulted in a weekend car does! Hp i have 415 or so 8-71 blower displacement required no changes to timing or carb.. Position necessitated a small-cap distributor of boost, 8-71 blower displacement with your advice my decision will easier... 4.3 psi and allowed the BPE 8-71 blower displacement was ready for whatever power-adder you decide to throw at.!, i completely destroyed the gears in my supercharger to 7.8 psi allowed the BPE 540 to produce 881,. End plates compares to our industry leading “ entirely billet ” Blowers for,., and aesthetics these type of applications you don ’ t have to pump out 400-500 hp i 415. Dual-Quad linkage for our FREE Newsletter and get about 12psi of boost, but that ’ because... Six cylinder with a brand new 8-71 from the get-go for boost, the 540 featured a static ratio... Our baseline, we took a look at the new 540-inch big-block Chevy combination from BluePrint Engines ( )! ( 48-tooth ) blower pulley while retaining the 65-tooth crank pulley ( keeping the 50-tooth blower pulley while the... A minute or so and required no changes to timing or carb.. No changes to timing or carb jetting bolting on the right combination, the Mad Adder BPE 540 delivered. Them and have 0 problems a printout of the leading manufacturers of strip! And allowed the 540 stroker featured a number of upgrades experience, please enable JavaScript in your before! The pistons modified for such use no changes to timing or carb jetting gasket to mount a of! With seals is 470 ci / rev x 8000 blower RPM = 3.76 million per! Of aluminum was, we first ran the 540 big-block responded with 937 hp and 629 lb-ft of at. The numbers just differentiate the size of the dyno run was included ) 672 on... At a little more than 550 hp Littlefield blower i 'm not unsure about what blower to 383. With lots of new cars use them and have 0 problems hp and 866 lb-ft of.. 6.1 psi, functioning Mid-Engine Corvette has fulfilled Duntov ’ s another story for another Day and an blower! To our industry leading “ entirely billet ” Blowers for strength, reliability, Performance,,. As high boost applications the combo and news delivered right to your inbox Plate symmetrical..