View Single Post
Old Nov 10, 2006 | 11:48 AM
  #1 (permalink)  
IlAureliuslI's Avatar
IlAureliuslI
Not quite 1337.
 
Joined: Oct 2004
Posts: 86
Likes: 0
Default It probably looked good on paper.

Recently, a company called Anatov has produced a small two-speed transmisison designed to go on a centrifugal-style supercharger. The goal is the same as when you attatch a transmission to an engine, you're trying to control the speed. This means that, provided the transmission has the proper gear ratios, you can take a centrifugal supercharger and set the boost output to an extremely high level and not have to worry about it building boost by the sqaure and achieving it only beyond a certain set RPM. The attatched transmision would be geared so that the engine, at idle, would spin the supercharger fast enough to produce the desired boost. A brilliant idea on paper, but it got me thinking. A transmission has to shift gears, and to do so, I'm guessing there's a momentary complete loss of power to the supercharger. This I thought, regardless of how short of a time it takes, would cause a significant drop in boost levels, so that when it shifted from gear 1 to gear 2 it would have to re-build the boost it lost. And so here is my question to you all. Would it be worth it? A momentary complete loss of boost, which would happen in first gear as the engine's RPM became high enough to sustain the preset boost in second gear, for the ability to launch of the line with 25+ PSI being fed to the engine?

As well, if the set boost level is large enough to where only the extremely high RPM range is capable of sustaining it while the SC tranny is in second gear, every time you shifted the engine's transmission and dropped the RPM, the SC tranny would also have to shift down to the firstr gear to sustain your boost. The SC tranny's downshift would not be a problem because it would occur at the same time as the engine tranny's upshift and likely be completed the same time the upshift was completed, however, that means in every single gear you would be dealing with the same momentary loss in power to the SC somewhere in the RPM range. Like I said though, this would only happen if the boost levels were set high enough. So it's possible that this supercharger two-speed transmission would not be a logical choice for high-boost.

On top of all this the predicted cost is between 2,000 and 4,000.....euros.

Discuss?
Reply