Blast from the Past! 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. 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. 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 … Can you ever have too much of a good thing? The very best you could hope for would now be 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. 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. 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). 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 … 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 So what? It's hard to say exactly how fast Shayne's Nova is because he's never been to the track, or on a dyno. 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 '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." I was on the edge of detonation on the dyno. 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. 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 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. “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. How much horsepower will I get with a Dyer's Blower Kit? 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). 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. The steering box is from a Vega, and the wheels are from the '60s or'70s. 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. street/competition blower. Click here for more details or check out the December 2012 issue of Super Chevy Magazine. 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. 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. The car is making 850+ horsepower, nd is capable of a lot more! 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). 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. 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. 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. 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. Introduced in the 1960s, the Chevrolet big block engine has been used in both performance and full-size cars as well as trucks. 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). 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. Naturally, the truck-based 454s were tuned for torque, so … 454 Chevy Big Block V8 Superchargers in … The company used that information to computer-model a custom cam that would fit. However, the new cam threw away a pound to 1.5 pounds of boost below 5,000 rpm. Induction 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. A 350 Chevy will make 525hp on pump gas. The cam is a single pattern, which means the intake and exhaust lobes have the same specs. 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. "You know the cam's not even a roller, right?" 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. 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). 900HP 8-71 Blown 454 Chevy. © 2020 Hot Rod | MOTOR TREND GROUP, LLC. How would these two cams perform naturally aspirated? 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. 15/23 15 OK, so the point here is to … 454 Big Block Chevy Blower Engine Andy Macchiaverna’s 1932 Ford show car was in need of a new engine. The 454 made tons of low-end torque and over 500 hp at 5,800 rpm. I made 5 LBS of boost and 30 degrees timing. Shop 454 Chevy Big Block V8 Superchargers and get Free Shipping on orders over $99 at Speedway Motors, the Racing and Rodding Specialists. Short-Block Shayne's car was built for one reason: to have fun. 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 Rotors are billet alum. That's 147 lb-ft and 214 hp better than naturally aspirated. Even with the wider lobe displacement angle on the solid, the total window of valve overlap is bigger on the solid. We ditched our mechanical long water pump in favor of a CSR Performance (formerly CSI) electric unit, PN 900R ($269.88). We see all sorts of ways of making horsepower and sometimes it seems the combinations can be endless. 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 Click here for the 8-71 blower dyno chart, By clicking Sign Up, you agree to the  Terms of Use. Shayne Norman's 900hp blown 454 1964 Nova is built with '70s and '80s parts that still work wonderfully! Those same people claim IF I use a 871 blower I will not have heating issues. In the case of boost, the answer is a resounding yes. A set of '71 square-port cylinder heads top the LS6 and are secured by FelPro head gaskets. 4,300 rpm and 534 hp at 5,800 rpm, you agree to the  Terms of Use collected. Huffer proved more interesting than we thought over 500 hp at 5,800 rpm through open.! Big-Block reads like an '80s PAW catalog 140-pound units from Crane, and require a big in! 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