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Anyone who has driven a Hummer H3 has commented on the lack of power. Even with a manual transmission, the acceleration leaves a lot to be desired. In an effort to resolve this concern, European automotive technology company, Antonov, will be showing its innovative 2-speed supercharger drive system at the Specialty Equipment Market Association (SEMA) show next week in Las Vegas.

After mounting the unit on the power steering pump bracket of the I5, the supercharger is overdriven at 1.36 to 1 from off-idle to about 4200 rpm under hard acceleration, then mechanically steps down to a 1 to 1 ratio at higher RPM's. The higher speed of the supercharger impellor increases power and torque to the rear wheels by an impressive 58 percent at lower engine speeds changing the personality of the H3 dramatically.

[Source: gizmag.com]

Autonov is also researching other applications for its multi-speed mechanical drive systems. The smaller displacement hybrid engines could use some forced incduction as an economical means for more low end power. The Autoliv system can be designed as a 2, 3 or 4 speed unit allowing the supercharger to be tuned to the specific needs and calibrations of the powertrain application.

This really sounds like a cool technonlogy, and one the H3 certainly screams for. Hot rodders have been switching to smaller supercharger pulleys to achieve this affect for years, but at higher RPMs there was always a chance of overspeeding the supercharger and causing heat-related issues with the rotor seals. Wouldn't it be great to set the boost level of your engine based on RPM; even better, if it were switchable from inside the car? In a Mustang GT application, Autonov was able to "hide" the compact supercharger/drive unit under the intake manifold. Reminds me of the NOS bottle hidden inside the heater core box with jets plumbed under the intake manifold of my '68 Camaro. Could this be the newest trend in "secret" perfomance mods?

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    • 1 Second Ago
      • 8 Years Ago
      What they really need to do is to make it possible to disconnect the supercharger when it's not needed, then pump it up as needed.

      It'd have the advantage of being hooked up for take-off, unlike a stupid turbo with its spin-up time lag. And the advantage of being efficient for cruising, where regular superchagers unnecessarily eat fuel.
      • 8 Years Ago
      To see this supurb Antonov supecharger in action goto: Good movie's with big sound' s.
      Also a lot of detailed pictures of this combined Rotrex/Antonov supercharger with the Antonov AMM 2-speed set up module. http://www.antonov-clubsite.nl/000000962f000d411/00000097c90900001/index.html
      In 31 oktober 2006 it will be demomstrated at the SEMA show in Las Vegas.
      There is also a http://www.AntonovForum.com
      • 8 Years Ago
      Its so annoying when people write "RPMs" or "RPM's"

      It's RevolutionS per Minute. It's a plural acronym so you don't need the s because it's already baked in.
      • 8 Years Ago
      I've seen the dyno charts for their Mustang. Torque is incredible in the low range, but takes an immediate and dramatic drop back to "normal" supercharged torque when the supercharger shifts gears. It didn't look very driveable.

      Supercharged Mustang torque curve here, and probably elsewhere: