Well this is it! Rotrex Supercharger Has been ordered!!!
09-13-10, 09:26 PM
#26
http://www.rotrex.com/Home/Technolog...t_Concept.aspx
http://www.youtube.com/watch?v=Vh1o9275VyM
Key to the Rotrex supercharger's unique compactness, efficiency, low noise and reliability is its state of the art traction drive technology.
Great speeds and low noise are just some of the advantages of traction drives over traditional gear transmissions. Traction drives transmit power through friction forces between its rolling elements.
The Rotrex patented traction drive uses an elastic annulus with a small pre-span to secure contact between the roller planets and the sun shaft with a reasonable force. The patented "ramp effect" increases efficiency and reliability in the transmission by regulating the torque transfer capability on demand through self-adjusting planet geometry.
To enhance performance, the Rotrex traction drive uses a special traction fluid. These fluids are a new family of synthetic hydrocarbon oils and greases offering a series of unique performance advantages. Developed specially for its use in Rotrex superchargers, the SX100 momentarily increases viscosity under high surface pressure, enhancing the traction drive performance by securing the optimum friction between rolling elements while cooling and protecting the system.
This traction drive combined with the latest technology in centrifugal compression, characterized by high adiabatic efficiency and low noise, gives Rotrex superchargers an exceptional competitive edge over any other forced induction solution.
Great speeds and low noise are just some of the advantages of traction drives over traditional gear transmissions. Traction drives transmit power through friction forces between its rolling elements.
The Rotrex patented traction drive uses an elastic annulus with a small pre-span to secure contact between the roller planets and the sun shaft with a reasonable force. The patented "ramp effect" increases efficiency and reliability in the transmission by regulating the torque transfer capability on demand through self-adjusting planet geometry.
To enhance performance, the Rotrex traction drive uses a special traction fluid. These fluids are a new family of synthetic hydrocarbon oils and greases offering a series of unique performance advantages. Developed specially for its use in Rotrex superchargers, the SX100 momentarily increases viscosity under high surface pressure, enhancing the traction drive performance by securing the optimum friction between rolling elements while cooling and protecting the system.
This traction drive combined with the latest technology in centrifugal compression, characterized by high adiabatic efficiency and low noise, gives Rotrex superchargers an exceptional competitive edge over any other forced induction solution.
http://www.youtube.com/watch?v=Vh1o9275VyM
09-14-10, 04:23 PM
#29
Interesting... It avoids most of the drawbacks of a turbo (no hot side, so no need for special cooling or intercooling, no lag) and is smaller and I would guess lighter than a Roots style blower. Looks like it would almost fit where my air pump is now...
Meant for blow-through, I would guess?
The inlet being on the rear opposite the pulley will make for some interesting plumbing choices, including hood-scoop inlets. & probably makes for short runners, too.
Wish I had the scratch to mess with one.
Meant for blow-through, I would guess?
The inlet being on the rear opposite the pulley will make for some interesting plumbing choices, including hood-scoop inlets. & probably makes for short runners, too.
Wish I had the scratch to mess with one.
09-15-10, 11:52 PM
#31
Jack of All Trades
iTrader: (2)
Join Date: Aug 2008
Location: Dallas Tx
Posts: 309
Likes: 0
Received 0 Likes
on
0 Posts
Most sexy...
I love the design of the Rotrex Supercharger. Very cool. Set up like a belt driven turbo 
Without the obvious turbo drawbacks, lag, oil needy, hot air problems etc...
I cannot wait to see this thing mounted, installed and running. Curious to know if it has that turbo whine to it or possibly that nasty supercharger whistle...
I'm hooked! Good luck with that thing!
Without the obvious turbo drawbacks, lag, oil needy, hot air problems etc...I cannot wait to see this thing mounted, installed and running. Curious to know if it has that turbo whine to it or possibly that nasty supercharger whistle...
I'm hooked! Good luck with that thing!
09-16-10, 01:50 AM
#32
I love the design of the Rotrex Supercharger. Very cool. Set up like a belt driven turbo Without the obvious turbo drawbacks, lag, oil needy, hot air problems etc...
I cannot wait to see this thing mounted, installed and running. Curious to know if it has that turbo whine to it or possibly that nasty supercharger whistle...
I'm hooked! Good luck with that thing!
Without the obvious turbo drawbacks, lag, oil needy, hot air problems etc...I cannot wait to see this thing mounted, installed and running. Curious to know if it has that turbo whine to it or possibly that nasty supercharger whistle...
I'm hooked! Good luck with that thing!
The whine that normally comes from superchargers is normally from the gearing inside it or the sound of the massive blades moving the air, since none of those are present, it won't be louder than what it is now.
09-16-10, 01:54 AM
#33
Interesting... It avoids most of the drawbacks of a turbo (no hot side, so no need for special cooling or intercooling, no lag) and is smaller and I would guess lighter than a Roots style blower. Looks like it would almost fit where my air pump is now...
Meant for blow-through, I would guess?
The inlet being on the rear opposite the pulley will make for some interesting plumbing choices, including hood-scoop inlets. & probably makes for short runners, too.
Wish I had the scratch to mess with one.
Meant for blow-through, I would guess?
The inlet being on the rear opposite the pulley will make for some interesting plumbing choices, including hood-scoop inlets. & probably makes for short runners, too.
Wish I had the scratch to mess with one.
09-22-10, 10:46 AM
#36
zoom zoom
Join Date: Jan 2010
Location: nederland, texas
Posts: 322
Likes: 0
Received 0 Likes
on
0 Posts
Hahaha I chased down my ups guy the other day cuz I moved houses and he went to the wrong address. The rx7 makes a good chase car lol. And btw I'm interested and staying tuned to this thread. I've been having this same idea for a while
09-22-10, 11:26 AM
#37
I need a new user title
Join Date: Oct 2005
Location: Yaizu, Japan
Posts: 2,646
Likes: 0
Received 0 Likes
on
0 Posts
Why run a BOV? The whole "pressure wave hurting compressors" thing is a myth, if that's what you're worried about. And you don't have a carb, so you don't have to worry about fuel pressure spikes. Unless you're just after the sound, in which case I understand.
09-22-10, 01:25 PM
#40
I need a new user title
Join Date: Oct 2005
Location: Yaizu, Japan
Posts: 2,646
Likes: 0
Received 0 Likes
on
0 Posts
In short, no one has been able to find any reliable technical documentation showing that BOVs or similar devices have any impact on turbo longevity. Anecdotal evidence suggests that they don't help much if at all. OEMs use them as a noise reduction device and so MAF sensors don't get confused (and a number of factory turbo cars don't have them). And in fact BOVs have been shown to cause actual damage to turbos if they fail, which is one reason no race cars run them. dj55b doesn't have to worry about that since superchargers are belt-driven, but there's no real reason to use one, either.
The only people who claim they're necessary are companies who are, you guessed it, trying to sell BOVs, and they never provide real data backing up their claims. I'm not even totally convinced they're needed with a blow-through carb setup, but I run one anyway because I got it for next to nothing and I like the noise it makes.
09-22-10, 01:58 PM
#41
BTW, I definitely believe in Blow off valves, especially when running higher boost levels (10psi+)
AGREED.
09-22-10, 05:39 PM
#42
Function > Form
iTrader: (1)
Join Date: Jun 2009
Location: College Station, TX
Posts: 330
Likes: 0
Received 0 Likes
on
0 Posts
I don't want to clutter dj55b's thread up too much. There's a huge thread about it in the single turbo section if you care to read it, and similar ones on many automotive forums.
In short, no one has been able to find any reliable technical documentation showing that BOVs or similar devices have any impact on turbo longevity. Anecdotal evidence suggests that they don't help much if at all. OEMs use them as a noise reduction device and so MAF sensors don't get confused (and a number of factory turbo cars don't have them). And in fact BOVs have been shown to cause actual damage to turbos if they fail, which is one reason no race cars run them. dj55b doesn't have to worry about that since superchargers are belt-driven, but there's no real reason to use one, either.
The only people who claim they're necessary are companies who are, you guessed it, trying to sell BOVs, and they never provide real data backing up their claims. I'm not even totally convinced they're needed with a blow-through carb setup, but I run one anyway because I got it for next to nothing and I like the noise it makes.
In short, no one has been able to find any reliable technical documentation showing that BOVs or similar devices have any impact on turbo longevity. Anecdotal evidence suggests that they don't help much if at all. OEMs use them as a noise reduction device and so MAF sensors don't get confused (and a number of factory turbo cars don't have them). And in fact BOVs have been shown to cause actual damage to turbos if they fail, which is one reason no race cars run them. dj55b doesn't have to worry about that since superchargers are belt-driven, but there's no real reason to use one, either.
The only people who claim they're necessary are companies who are, you guessed it, trying to sell BOVs, and they never provide real data backing up their claims. I'm not even totally convinced they're needed with a blow-through carb setup, but I run one anyway because I got it for next to nothing and I like the noise it makes.
Turbine shaft damage notwithstanding, I find it hard to believe compressor stall doesn't have an adverse effect on engine performance. Just basic rotational inertia would make it spool up faster if it was still spinning, not stopping and reversing direction. I'm curious why you say no race cars run them, I see them all the time.
09-23-10, 02:31 PM
#49
I need a new user title
Join Date: Oct 2005
Location: Yaizu, Japan
Posts: 2,646
Likes: 0
Received 0 Likes
on
0 Posts
Here's the other thread if anyone else is interested.
Turbine shaft damage notwithstanding, I find it hard to believe compressor stall doesn't have an adverse effect on engine performance. Just basic rotational inertia would make it spool up faster if it was still spinning, not stopping and reversing direction. I'm curious why you say no race cars run them, I see them all the time.
Turbine shaft damage notwithstanding, I find it hard to believe compressor stall doesn't have an adverse effect on engine performance. Just basic rotational inertia would make it spool up faster if it was still spinning, not stopping and reversing direction. I'm curious why you say no race cars run them, I see them all the time.
http://fdowners.com/showthread.php?t=217
http://www.ausrotary.com/viewtopic.php?f=16&t=17113
But I do want to say that the turbo does not stop or spin backwards. That's silly. And the race cars I'm referring to are all the high-end road racers and rally racers. If you see something like a BOV on one, it's usually actually a pop-off valve.
Anyway, sorry for getting us off topic.