Bigger is ALWAYS better!! HAHAHAHA! Yeah, It'll work. Looks ridiculous IMO. 12V71 Detroit Diesels in some applications (Terex/Euclids) use a 6-71 blower for each 6 cyl. bank with TWO turbos feeding each blower. Thats 2 blowers and 4 turbos on ONE engine. Screemin' Detroits!!
yeah it will work, cuz they prolly got a stock 4 barrel under the whole mess. unless that car is channelled, the first blower is a good 10 inches above the intake.. stupid stupid stupid.
The first(bottom) blower is mounted on an intercooler. With two blowers compressing the incoming air, it probably generates plenty of heat. I'm sure each blower is running low boost. The bottom one would just 'magnify' the boost of the top.
Uhm, yeah it might work, for the same reason someone posted earlier. I can't see how you could develop any more boost pushing one blower into another of equal displacement. It is cool for the shock factor of people who just think cars are cool to look at.
I'm not a blower guru, but I do have extreme common sense. This setup would provide boost, but the way it is set up the second (lower) blower is doing absolutely no good, and is quite possibly a horsepower waster. The basis I'm using for comparison is a two-stage air compressor, where the "low side" compresses a larger volume of air into a smaller volume "high side" compressor which compresses the volume further, to a higher pressure. To accomplish this with two equal displacement roots type blowers (the ones on this car appear to be equal sized) would require that the upper (low side) blower be spinning faster than the lower, in order to compress the greater volume of air that a primary stage of a two-stage compressor handles. Now look at the front set of pulleys. To me, they are at best the same, size, and it may be that the driving pulley on the front of the lower blower is actually a bit smaller than the driven pulley on the upper blower. This means that the top blower is running slower (ie, moving a smaller volume of air) than the bottom blower, exactly backwards of what a well-designed two-stage system would be. If this kind of a setup really worked then you'd see it on Warren Johnson's Pontiac, wouldn't you? The Pontiac in the picture is likely a far cry from a good runner.
Guys... That's the Pypes Pontiac; it was at the Woodward Dream Cruise this past August. It was built to generate controversy, bench racing, and general publicity for the company. Whether it works or not is a moot point - it's accomplishing its intended purpose.
Yea, I work on diesel locomotives GE's and EMD's. Most now have 4000hp from either a turbo, about have the size of a VW, or two blowers. Theres nothing like standing iches away from one of these while it's at full bore(notch 8), hoping like hell everything is at torque spects!
It certainly does generate all of the above. Hope they know more about exhaust systems than they do induction..........
does anyone remember the twin blower Buick Car Craft did a few years back- one was almost straight up and down and one was off to the side all wonky? it looked goofy as hell, but it made good power!
2 blowers of teh same size CAN be a 2 stage blower system. if the top blower is underdriven, and the bottom is overdriven, the bottom will compress the tops air even further. let the contraversy continue
they could be driven the same speed and still it will compress the air more as it goes thru the second blower. the true purpose of stacked blowers (and stacked intercoolers) is kind of like the purpose of 52" fake ***s on a woman....decoration, not function
I have a full 3" exhaust setup from Pypes on my GTO. It was delivered poorly packed, hangs way lower than I would like it to, and the quality of the X-crossover is questionable. So I guess the answer is... NO.
Not true. If they are driven at the same speed, and are the same size blowers, then you don't have additional volume for the second blower to compress. The very simple fact to keep in mind is that compression is merely the packing of a certain volume of air into a smaller space. Take something we are all familiar with, a piston in a cylinder. If you could take one cylinder at top dead center of the compression stroke, and pump that compressed charge into another cylinder (key point coming-->)WITHOUT ADDING ANY ADDITIONAL VOLUME OF AIR(<--key point to consider), that second cylinder will not be able to compress the charge to any higher pressure than it was in the first cylinder. Physics lesson over.....
Gary Myers Mustang (Silver one) here in Oz now runs a single blower. At Summernats he tried to light them up but as he could never figure out how to set it up properly it couldn't do it! Yeah, its a WOW factor for show cars. The two stage compressors used in aircraft are made to kick in at different al***udes. They only work well in a low ambient oxygen environment say above 10000 ft. Ebbsspeed's right, that would only deliver at max to volume of air that the lower supercharger could deliver. (Providing it has impellers) However I think you got the overdrives mixed, the lower one would have too spin faster to work right. At least thats how the two stage blower on a Merlin ** I worked on from a MkVIII Spitfire I worked on did.
Back in the 50's Tod Raliegh ran a front mount blower drive on a Olds powered dragster . He had a 671 feeding a 471 and it was truly a 2 stage deal . It worked well enough to blow a couple spark plugs with wires attached about 300' above the Colton dragstrip. That thing shook the ground when right even on gasoline . WDIFL has a picture of it somewhere .
Looking closely at the first Pic,it looks like the driven pulley is a little larger than the drive pulley for the top blower making the top blower run a bit slower than the bottom blower
Two Stage Supercharging can work, if it is designed right. Pic is of the pre war Alfa Romeo 158 Alfetta. 425HP out of 1.5 litres, in its last version...
hmmmm....maybe...but I'll bet the air will get heated a bit going thru the second one from the commotion, and pressure will increase a bit (along with temperature)
Again not HAMB material but: Rick Dobbertin from up Syracuse way had a BBC in an eraly Nova witha a 6-71 and two turbos. That thing ran great. Don't know if he ever took it down the strip but he did take it to the street. First car in history to win back to back ***les for Best Engine, Best Engineered, Best Car, and Best Pro Street Car at the 1982 and 1983 Car Craft Street Machine Nationals, and the 1983 Car Craft Street Machine Nationals - East. Hot Rod magazine's 1982 Street Machine of the Year. (thanks to supercars.net) And then he did the Pontiac J200 with a Magnasen double blower and turbos. Rode in that one so I can vouch that it ran.
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