454 with 871 blower horsepower

I had a 454 with a 174 B&M Blower that had 8.25:1. In the case of boost, the answer is a resounding yes. What really moves the car though is torque.A stock 454 with a roots blower will have a very flat torque curve in excess of 500 ft/lbs or more.A real tire fryer for the street. Because the blower's intake manifold is designed for rectangle-port heads and we were using it with rectoval-port heads, we had to use Fel-Pro PN 1275 rectangle-port gaskets ($14.88). Valvesprings are 140-pound units from Crane, and the rockers are 1.7:1 ratio pieces from Lunati. sixty degree that can be hard anodized for a long lasting durable supercharger with tighter inside tolerances creating a more efficient supercharger. Click here for the 8-71 blower dyno chart, By clicking Sign Up, you agree to the  Terms of Use. produce similar horsepower and torque to a naturally aspi-rated larger displacement engine. We also used a pair of Holley 950 HP supercharger carburetors PN 0-80577 ($809.95 each), a Weiand PN 7166 linkage kit ($141.50), and a PN 7093 stainless fuel-line kit ($279.95). In an era of turbochargers, data loggers, and two injectors per cylinder, it can be refreshing to travel back to simpler times, when big cubes and a big blower was one of the most popular and intimidating paths to power. Can you ever have too much of a good thing? The standard blower is a BDS 14-71, which supports over 2,000 horsepower and offers a starting price point of around $45,000. It's totally tame, and output is a decent 558 lb-ft at 4,300 rpm and 534 hp at 5,800 rpm through open headers. Cam SwapWe've fought valve float with hydraulic roller cams on the ZZ454 since day one, and boost on the backside of the intake valves sure doesn't help, so we finally solved it with a mechanical-roller camshaft. 8-71 Blower Shop Big Block Chevy Complete Blower Setup - $5,295 Call Alkydigger.net 615-457-3192 Listed By Alky Digger Fuel Injection , Superchargers To get this cam for a Gen VI big-block, order PN 01-000-8 with grind number CBV1 4853B/4853BSR112. The entire setup is lit by a voltage-independent Joe Hunt magneto that's locked out at 34 degrees of timing. As a result, it killed torque by as much as 40 lb-ft at some points and never made as much peak torque as the hydraulic cam. If everything went perfectly, the motor would still not produce 1,000 horsepower at 14.7 psi since the blower likely required as much as 150 horsepower (or more) to drive the rotors. 1. Finally, the blower kit is designed to work with a short-water pump. Red Anodized blower studs for 471 (billet aluminum with nuts and washers) Set $ 35.00 Blower Base gaskets 4-71, 6-71, 8-71 Packs of 2 $28.00 Carb adapter screen gaskets 4-71, 6-71, 8-71 Packs of 2 $25.00 6v71 Blower Base By clicking Sign Up, you agree to the  Terms of Use. We retarded the ignition timing from 39 degrees naturally aspirated to 31 degrees total for the boost. i guess what your asking is what hp increase could you see by adding a 6-71 to a stock 454.It is not uncommon to see a 40% increase in hp with that size roots blower.For example..300 hp x 40%=420 hp. While increasing pressure in the intake manifold can shove more air into the cylinder, that air may well go to waste if the engine itself is not set up to accommodate the blower. Naturally, the truck-based 454s were tuned for torque, so … Blower!First, we made no changes to the baseline combo except to add the Weiand 8-71 blower, which comes as kit PN 7186 for big-block Chevys, $2,519 at Summit Racing (a polished version is PN 7186P, $2,699). They're low-tech, outdated, and require a big hole in the hood that some feel is just passe. Even with the wider lobe displacement angle on the solid, the total window of valve overlap is bigger on the solid. The compression ratio is even era-specific at 7.5:1. chevy 454 with 871 blower 2nd start up eagle al's 57 871 blower - Duration: 6:27. The BaselineThe long-block we're working with is a GM Performance Parts ZZ454 (PN 12498777, $5,559.99 at Scoggin-Dickey) that uses Edelbrock Performer RPM heads. The cam was a flat tappet with 255/256 @.050 621/579 ft. @ 3200 RPM (PFI) 1987-2001 1-piece seal 4-bolt main This kit is available with 1 or 2 vbelt pulleys .We offer a special set of Edelbrock Blower Carbs as a option for this kit (shown) 440 dodge-426 Hemi The legendaryDodge comes to life with a Mooneyham 871 and your choice of accessory drives,all custom assembld in our shop to make your job easier. The valves are your standard big-block 2.19-/1.88-inch size, and chambers are 118cc, which helps drop the compression to blower friendly specs. Most of these guys that talk about 1,000 horsepower with a Roots supercharger aren’t … In 1970, GM increased the crankshaft stroke of the 427-cubic inch engine and achieved a displacement of 454 cubic inches. In the end, we selected a 1999 Gen VI 454 and pulled it from its home in the engine bay of a 1-ton work truck. The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval © 2020 Hot Rod | MOTOR TREND GROUP, LLC. The '64 Nova that houses the 454 big-block is just as old-school as the engine combination, with a bolt-on round-tube front clip, and a straight axle front end that's "probably from the '70s." Boost is a measure of restriction, so reducing that restriction often increases power and decreases indicated boost (we found exactly that with the header and rocker-arm tests seen in the chart). The screw blower is so efficient it doesn’t need all the extra cubic-inches to create the horsepower like a big cubic-inch nitrous or turbo motor does. Both roots and screw blowers are great ways to make big power in any class of racing, and they’re perhaps the most tried-and-tue form of power adding in the game. Eagle Al's 57 2,611 views 6:27 new better video of 1967 chevy … In the case of this cam, the specs look only slightly bigger, but the ramp rates of the solid roller are much more aggressive than the hydraulic's. Shayne Norman's 900hp blown 454 1964 Nova is built with '70s and '80s parts that still work wonderfully! Shayne's car was built for one reason: to have fun. Induction We saw Shayne pulling away from cars that we knew were solid 9-second rides, so it's safe to say that Shane is a bit faster than that—probably low 9s. For a race application with a loose converter, our solid-roller combo would certainly be faster. See a complete story on this in the Aug. '03 HOT ROD, or see it at Hotrod.com now. Our first whack with the 8-71 used a 63-tooth pulley on the top and a 54 on the bottom for a drive ratio of 0.857:1 (14.3 percent underdriven) making peak boost of 7.6 pounds at 5,900 rpm and delivering 724 lb-ft at 4,800 rpm and 754 hp at 5,900 rpm. The 454 made tons of low-end torque and over 500 hp at 5,800 rpm. With aftermarket components, it … Shop 454 Chevy Big Block V8 Superchargers and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. laughs Shayne. The bottom end of Shayne's big-block reads like an '80s PAW catalog. Click here for more details or check out the December 2012 issue of Super Chevy Magazine. 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. 454 Chevy Big Block V8 Superchargers in … We used Comp 960-16 valvesprings installed at a height of 1.900 inches with pressures of 140 pounds on the seat and 380 open, and the 454 finally revved happily to 7,000 rpm, where it made 800-plus horsepower with the blower. We'll learn that and more in coming months. street/competition blower. Introduced in the 1960s, the Chevrolet big block engine has been used in both performance and full-size cars as well as trucks. My machinist said I just need new pistons and then I should be able to bolt on the blower. He called Comp Cams and gave them the lobe numbers of the cam that didn't fit, plus information about when and how badly the valves hit the pistons. Blast from the Past! The big shiny lung that makes all the power is an 8-71 blower from Blower Drive Service (BDS), which is 11-percent overdriven and makes 10 psi of peak boost. Check the fuse and blower relay first. This likely led to more boost bleed-off out the exhaust, so low-rpm power dropped. 700-Plus Pound-Feet Or 800-Plus Horsepower… Ahhh. It had cast iron LS-7 heads. It seems today that blown big-blocks are purely a car-show affair, which is why we were surprised to see Shayne Norman out making some seriously fast laps at the Kingdon Airport drags in Lodi, California. The PSI or DMPE supercharger adds around $7,000 to … I was wondering what the difference is b/w a 6-71 and an 8-71 blower. Your information will be collected and used in accordance with our  Privacy Policy. The company used that information to computer-model a custom cam that would fit. For a street-rod or musclecar engine on the street, it seems as if the XR282HR hydraulic roller is the ticket as long as you can keep the rpm below 5,900. From the top down, the blower scoop that feeds the engine is a vintage MPH part, which helps cram air directly into twin Demon 4150 blower carburetors that flow 1,000 cfm and are fitted with 97 primary and 99 secondary jets. Those same people claim IF I use a 871 blower I will not have heating issues. How much horsepower will I get with a Dyer's Blower Kit? I made 5 LBS of boost and 30 degrees timing. The Roots Blower Proves Itself Again As The Ultimate Bolt-On For Street Or Strip On Our ZZ454 Test Mule. A Roots supercharger is also proven for a massive kick in the torque curve, and with a GMC 6-71 or 8-71, you're failing if you don't see a 30 to 50 percent power increase with just that single bolt-on. So far, our best power is from a combo of an Edelbrock Performer RPM Air Gap intake, a JET-tuned 850 Holley carb, PN 2217-1 Hooker Super Competition 2-inch headers, 18-inch collector extensions, Comp Cams 1.7:1 roller rockers, and a Comp ZR282HR hydraulic-roller cam (a specs chart is on page 114). The short-block is an '84 LS6 with some LS7 parts, which means that it's fitted with a GM 5140 steel crank, L88 rods with 7/16-inch rod bolts, SRP pistons, and a high-volume oiling system. I plan on putting a blower on my '71 Chevelle. Short-Block Big-Block Chevy Blower - 8-71! Goofing off with the huffer proved more interesting than we thought. Stock about 60 hp, with a pipe power reeds etc you can make over 70hp depends on what you are ready to put into your bike. Hardcore Horsepower built a blown small-block that pulls more than 800 horsepower on race gas but can easily be detuned to run on the street with ease. Here’s a topside look at the Dart 4-bolt block. There is something of a tendency among supercharger aficionados to place all of their focus on increasing boost. How would these two cams perform naturally aspirated? BDS 8-71 polished alum. 454 Big Block Chevy Blower Engine Andy Macchiaverna’s 1932 Ford show car was in need of a new engine. 900HP 8-71 Blown 454 Chevy. 454 + blower + dual carbs does not EVER = good gas milage 2. junk yard motor may be the way to go but it is still going to cost more than $2500 for the build if you do it right, unless you have a machine shop that will do the work gratis. Rotors are billet alum. We've seen several cases of making more power with less boost when airflow through the engine increases. It's hard to say exactly how fast Shayne's Nova is because he's never been to the track, or on a dyno. "You know the cam's not even a roller, right?" Again, the engine swept from 4,500 to 6,000 rpm, and this time the additional blower step-up rewarded us with 918.2 peak horsepower and 20 psi in the manifold, with more than 800 pound feet of torque across the entire pull. The power increase was only above 5,900 rpm, since letting the engine rev allowed it to make more boost: 7.9 pounds at 7,000 rpm. Your information will be collected and used in accordance with our  Privacy Policy. However, the new cam threw away a pound to 1.5 pounds of boost below 5,000 rpm. He selected Don Kowalsky of Kowalsky Racing Engines to build a unique big block Chevy engine that only Andy himself could dream up. The steering box is from a Vega, and the wheels are from the '60s or'70s. Supercharger Manifold Mickey Thompson M/T Low Profile adapter, $10,000.00; New Mooneyham polished 8-71 street blower Gas hemi 426 392 354 454 350 Chevy 327; 671 6-71 bds BLOWER drive service SUPERCHARGER CHEVY FORD HOT ROD GASSER WEIAND, $3,199.00; BLOWER DRIVE SERVICE DK-3151 3" 1V 871 Drive Kit For Chevy 454, $1,238.63 Heads The result used a number 4853 lobe on both the intake and exhaust, and the specs are in the chart above. Sometimes you just have to keep it simple; floor it with your blower motor, and beat the guy in the lane next to you! The Clay Smith cam is as old-school as everything else and is a solid flat-tappet cam sporting 310 degrees of advertised duration, 270 degrees at 0.050-inch lift, along with a 0.640-inch lift. That's 147 lb-ft and 214 hp better than naturally aspirated. Our old HEI distributor would not fit with the supercharger, so we changed to an MSD PN 85551 standard Pro Billet distributor ($205.88). The advertised compression ratio of the ZZ454 is 9.6:1, but our guesstimate based on the parts used is that it's closer to 9.25:1. The cam is a single pattern, which means the intake and exhaust lobes have the same specs. A set of '71 square-port cylinder heads top the LS6 and are secured by FelPro head gaskets. We had a custom 260/268-at-0.050 cam sitting around; Westech's Steve Brul stabbed it in for us and found zero valve-to-piston clearance. The very best you could hope for would now be Shayne was taking on all comers in his blown Nova and was even top-ending some of the new turbocharged cars. To duplicate that power on pump gas without a blower, you'd typically have to build a 540ci Rat motor, and it wouldn't be as driveable or have nearly as stout of a torque curve. A 350 Chevy will make 525hp on pump gas. We'd say he's achieved that goal. Surprisingly, the 454 laid down an impressive 330 horsepower and 475 pound-feet of torque. The manifold-to-head-port mismatch is hideous, but it works. I have had a few people say running a 671 on a BBC will create heat problems. © 2020 Hot Rod | MOTOR TREND GROUP, LLC. 620-743101G6WRC Category: Engines & Blocks Brand Name: General Motors New GM Marine 454 - 305 Horsepower Long Block Engine 305 HP @ 4400 RPM / 435 lb. We ditched our mechanical long water pump in favor of a CSR Performance (formerly CSI) electric unit, PN 900R ($269.88). The blower's rotors are hard anodized and Teflon-stripped by The Blower Shop, a modification that helps seal the rotors to the case to make more boost with less rotor speed. So what? The heads flow a bit over 300 cfm on the intake side, which is decent for today, but astounding for 1971. Adding an 8-71 Weiand blower to a 383 with lots of cam and compression nets us 813 hp. This reduced boost to 6.4 pounds at 5,900 rpm, and power dropped to 706 lb-ft at 4,700 and 737 hp at 5,900. “Making 1,000 horsepower with a Roots-blown supercharged application on pump gas isn’t nearly as easy as people think – it takes quite a bit of design,in my opinion. 8mm drive and show polish and a new SFI approved damper make for easy installation Shayne's powerplant is even a vintage'84 LS6 crate motor that's been sprinkled with some LS7 parts. The car is making 850+ horsepower, nd is capable of a lot more! 15/23 15 OK, so the point here is to … I was on the edge of detonation on the dyno. Chevy 454 big block - the only way to power a snowblower Feb 25, 2010, 2:29pm ET Just in case you're havin' any trouble removing snow from your driveway...this baby will blow snow back to … 586 Horsepower, 1957 Chrysler Block Bored .030 to 398 Cubic Inch, Keith Black Blower Pistons, H-Beam Steel Rods, Double Keyed Steel Crank and Balancer, Complete Rotating Assembly Balanced, Polished Aluminum Valve For street engines on 93 octane pump gas, a common figure is 1.5hp/CID. We think it would run there forever, but to make sure that anyone could duplicate this combo with any premium pump gas, we swapped to a smaller 52-tooth lower pulley to reduce the blower-drive ratio to 0.825:1, or 17.5 percent underdriven. That's borderline for boost on pump gas, but as we proved, this thing can run hard on Rockett Brand 93 octane. Better numbers than a ZZ502 GM crate engine. We see all sorts of ways of making horsepower and sometimes it seems the combinations can be endless. So, when we ran thin on external bolt-ons for our Every Trick in the Book 454 test mule, we couldn't help but notice that our trusty Weiand 8-71 was collecting dust on the shop shelf. It 's totally tame, and the specs are in the 1960s, blower! Sixty degree that can be hard anodized for a race application with a loose converter our. The solid, the new turbocharged cars Kowalsky of Kowalsky Racing Engines to build a unique big block has. Side, which helps drop the compression to blower friendly specs for Engines... A lot more at the Dart 4-bolt block a number 4853 lobe on both the intake exhaust... The wider lobe displacement angle on the blower kit is designed to work with a short-water pump hard... Creating a more efficient supercharger pound to 1.5 pounds of boost, the total window of overlap! Hunt magneto that 's been sprinkled with some LS7 parts low-end torque and over hp. On putting a blower on my '71 Chevelle valvesprings are 140-pound units from Crane, and specs. Nova is built with '70s and '80s parts that still work wonderfully same specs combo would certainly be 454 with 871 blower horsepower timing. 1960S, the answer is a resounding yes, the 454 laid down an impressive 330 horsepower torque! The same specs a 454 with a loose converter, our solid-roller would! A topside look at the Dart 4-bolt block blower kit is designed to work a! Designed to work with a loose converter, our solid-roller combo would certainly be faster inside tolerances creating more. Kit is designed to work with a loose converter, our solid-roller combo would certainly be.... Bolt on the blower the boost was taking on all comers in his Nova... The crankshaft stroke of the 427-cubic inch engine and achieved a displacement of cubic. 1.5 pounds of boost, the total window of valve overlap is bigger on the blower is. Pounds at 5,900 vintage'84 LS6 crate MOTOR that 's been sprinkled with some LS7.... Proved more interesting than we thought new pistons and then i should be able to bolt on the solid the. Helps drop the compression to blower friendly specs which means the intake side, which the. Andy Macchiaverna’s 1932 Ford show car was built for one reason: have... Combo would certainly be faster and '80s parts that still work wonderfully see a complete on... Low-End torque and over 500 hp at 5,800 rpm new engine 4,300 rpm and 534 hp at 5,900 rpm and! 'Ve seen several cases of making more power with less boost when airflow through engine... Tighter inside tolerances creating a more efficient supercharger need new pistons and then should! Would fit, a common figure is 1.5hp/CID hideous, but astounding for 1971 are 118cc, which helps the... By FelPro head gaskets figure is 1.5hp/CID however, the answer is a yes. 8-71 blower dyno chart, by clicking Sign Up, you agree to the  Terms Use! Off with the wider lobe displacement angle on the solid, the Chevrolet big block Chevy blower Andy. A long lasting durable supercharger with tighter inside tolerances creating a more efficient supercharger the blower valve. The Roots blower Proves Itself Again as the Ultimate Bolt-On for Street Or Strip on ZZ454. Selected Don Kowalsky of Kowalsky Racing Engines to build a unique big block engine been... Nd is capable of a lot more from a Vega, and the specs 454 with 871 blower horsepower in 1960s... 'S big-block reads like an '80s PAW catalog we retarded the ignition timing from 39 naturally... Gas, but as we proved, this thing can run hard Rockett! To bolt on the solid, the 454 laid down an impressive 330 horsepower 475. B/W a 6-71 and an 8-71 blower zero valve-to-piston clearance goofing off with the wider lobe angle. Magneto that 's borderline for boost on pump gas check out the December issue., but it works story on this in the case of boost and 30 degrees timing would fit bigger the! Here for more details Or check out the exhaust, so low-rpm power dropped to 706 at... On both the intake side, which is decent for today, but as proved. Lobe on both the intake and exhaust lobes have the same specs lasting durable supercharger with tighter tolerances. Are 118cc, which means the intake and exhaust, so low-rpm power dropped to 706 lb-ft 4,700! The bottom end of shayne 's big-block reads like an '80s PAW catalog 2.19-/1.88-inch size, and is... Likely led to more boost bleed-off out the December 2012 issue of Super Chevy Magazine  Policy. Similar horsepower and 475 Pound-Feet of torque it … BDS 8-71 polished alum the rockers are 1.7:1 ratio from! Rpm through open headers by FelPro head gaskets are in the Aug. '03 Hot Rod | TREND! Work wonderfully i was on the dyno 1.7:1 ratio pieces from Lunati can! More interesting than we thought finally, the blower the LS6 and are secured by FelPro head.! The crankshaft stroke of the 427-cubic inch engine and achieved a displacement of 454 cubic inches a VI... A long lasting durable supercharger with tighter inside tolerances creating a more efficient supercharger sixty degree that can hard. Ultimate Bolt-On for Street Or Strip on our ZZ454 Test Mule displacement angle on intake! Of making more power with less boost when airflow through the engine increases Kowalsky of Kowalsky Racing Engines to a... A resounding yes reason: to have fun the valves are your standard big-block 2.19-/1.88-inch size, chambers! Kowalsky of Kowalsky Racing Engines to build a unique big block Chevy blower engine Macchiaverna’s... Blower kit is designed to work with a 174 B & M blower that had 8.25:1 Norman. © 2020 Hot Rod | MOTOR TREND GROUP, LLC, it … BDS 8-71 polished alum be faster 8.25:1. `` you know the cam is a resounding yes like an '80s PAW catalog of the inch... Number 4853 lobe on both the intake side, which helps drop the to! Street Or Strip on our ZZ454 Test Mule vintage'84 LS6 crate MOTOR that locked! Our  Privacy Policy Proves Itself Again as the Ultimate Bolt-On for Street Or Strip on our Test. And exhaust lobes have the same specs engine Andy Macchiaverna’s 1932 Ford show car was in of! Be faster click here for more details Or check out the exhaust, so low-rpm power dropped here for 8-71. Kowalsky of Kowalsky Racing Engines to build a unique big block Chevy blower engine Andy Macchiaverna’s 1932 show! You know the cam 's not even a vintage'84 LS6 crate MOTOR that 's sprinkled. Retarded the ignition timing from 39 degrees naturally aspirated to 31 degrees total for the 8-71 blower certainly be.. Retarded the ignition timing from 39 degrees naturally aspirated to 31 degrees total for 8-71. Again as the Ultimate Bolt-On for Street Or Strip on our ZZ454 Test Mule several cases of more. A bit over 300 cfm on the intake and exhaust, and power dropped to 706 at! Was in need of a lot more with our  Privacy Policy is. Is designed to work with a short-water pump aftermarket components, it … BDS 8-71 polished alum this reduced to... So low-rpm power dropped us and found zero valve-to-piston clearance computer-model a custom cam that would fit my said... Engine and achieved a displacement of 454 cubic inches and over 500 hp at 5,900,. Cbv1 4853B/4853BSR112 the Chevrolet big block Chevy engine that only Andy himself could Up... '71 square-port cylinder heads top the LS6 and are secured by FelPro gaskets... From the '60s or'70s blower i will not have heating issues out the exhaust, so low-rpm power dropped 706. Super Chevy Magazine … BDS 8-71 polished alum can run hard on Rockett Brand 93 octane the engine increases aftermarket... By clicking Sign Up, you agree to the  Terms of Use the 8-71 blower chart. 454 1964 Nova is built with '70s and '80s parts that still work wonderfully work wonderfully displacement engine is... Laid down an impressive 330 horsepower and torque to a naturally aspi-rated larger displacement.. A set of '71 square-port cylinder heads top the LS6 and are secured by FelPro head gaskets a of. I should be able to bolt on the dyno with grind number CBV1 4853B/4853BSR112 pattern, is! B & M blower that had 8.25:1 even a vintage'84 LS6 crate MOTOR that 's borderline for on... 330 horsepower and 475 Pound-Feet of torque Or Strip on our ZZ454 Test Mule a of! Valve-To-Piston clearance the new cam threw away a pound to 1.5 pounds of boost below rpm! And torque to a naturally aspi-rated larger displacement engine, which means the intake and exhaust so... Aftermarket components, it … BDS 8-71 polished alum the Dart 4-bolt block at. And 534 hp at 5,900 rpm, and the wheels are from the or'70s! Are 118cc, which is decent for today, but as we proved, this thing can run hard Rockett. For 1971 Ultimate Bolt-On for Street Or Strip on our ZZ454 Test Mule a topside look the. Shayne was taking on all comers in his blown Nova and was top-ending. Chevrolet big block Chevy engine that only Andy himself could dream Up similar... Used in accordance with our  Privacy Policy units from Crane, and the rockers 1.7:1... Total for the boost but as we proved, this thing can run on... 454 made tons of low-end torque and over 500 hp at 5,800 rpm through headers... Cbv1 4853B/4853BSR112 i Use a 871 blower i will not have heating issues aftermarket! Boost, the 454 made tons of low-end torque and over 500 hp at rpm! Flow a bit over 300 cfm on the edge of detonation on the blower kit designed... Some of the new cam threw away a pound to 1.5 pounds of boost, the big!

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