Actually, a couple of things about the 62.....

when we started the 62 project there was no real knowledgs of the Rotrex

LDG showed me a graph and at similar whp he was able to get more tq down low with the 45.... as the rpm grew the 62 blew on by it pulling very strong to red line...

The Rotrex in theory should be very strong... I wonder why it is not adopted by more factory cars.....Lotus etc ?

If it were me today there is no doubt I would be a Rotrex early adopter..... but I have had enough early adopting for a while.... my glass is raised to the new "torch carriers"... best of luck on what seems to be a VERY promising mod

 

Talking of hitting the track, is El D going to see one this year Jan??

 

yes, still waiting on axles as the stockers probably won't make a pass if it hooks up

 

Quoted directly from the Magnuson website:

URL="http://www.hiperformancestore.com/MagnusonSuperchargers.htm"] http://www.hiperformancestore.com/MagnusonSuperchargers.htm[/URL]
Centrifugal Superchargers:

"Let's get one thing straight. NOBODY has built a factory supercharged car using one of these things since 1964, and every company I know of that did it back then is now out of business. Why is that? Because while the centrifugal units are great for certain applications they are poor performers on street cars. Here is the main problem. Their boost increases as the square of the engine RPM. In other words when set up for 8 pounds of boost (about all you can run safely on a modern motor with pump gas) on an engine with a 6000 RPM redline they will only provide 2.8 pounds of boost at 3000 RPM. Now for some real math. With 8 pounds of boost at 6000 RPM an engine will gain about 54% more power. With 2.8 pounds the power gain will be only 19% at 3000 RPM. Obviously below 3000 rpm the power gains would be insignificant. Take a look at your tach when driving on the street and see where you are really operating the motor. It's rarely in the range where the Centrifugal will be giving a lot of boost. With the same 8 pounds of boost all the other types would be giving the full 54% increase through the whole RPM range. The Centrifugal units do have some advantages. First they cost less power to drive then all other belt driven types. They also have lower discharge temps. This means that at 6000 RPM with 8 pounds of boost and everything else equal they will put out slightly more horsepower. The problem is that in a race by the time they reach 6000 RPM the cars with Roots, Lysholms, or Turbos will be long gone. The other big advantage is that it's A LOT easier to make a kit using a centrifugal unit. I know, I make custom supercharger kits! They have lots of fitting for easy remote mounting and they have round intake and discharge ports which are easy to attach tubing too. With Roots or Lysholms there is A LOT more stuff to be manufactured. The commercial success of Centrifugal superchargers is due to two factors. It's a lot easier to make the kits, and they can advertize a higher peak horsepower number which is all the uneducated buyer looks at. The reality is the lack of power througout the RPM range means you get beat by every other supercharged car on the road.
Now I may seem a bit negative about the Centrifugal units and I don't really mean to be. For certain applications they are great. For example if you are building a 2000 horsepower car set up for drag racing with closely spaced gears they just might be the way to go. This is because the car will be traction limited at the low and mid range end of low gear so the lack of boost is not a factor. Once the car gets going the closely spaced gears enable the motor to stay right in the range where it makes power. If you are going to set a car up this way the ATI Procharger is probably the way to go. The car will make more power then any other belt driven system and not have the spooling up issues of a turbocharger.
In Summary here are the advantage of the Roots supercharger
VS Lysholm the Roots offers better fuel economy and better performance at the boost levels you are likely to use. Plus it offers reliability proven in over 300,000 factory applications a year.
VS Turbos. the Roots offers more power under the curve and probably more power period below 8 pounds of boost. The Roots supercharger has no lag, and a lot more power at low RPM. The Roots also has the edge in reliability. As I said, try and find an aftermarket Turbo kit with a 3 year warranty, or any powertrain warranty at all!
VS Centrifugals. This one is easy, A lot more power under the curve (that means throughout the RPM range) and proven reliability.
For a street car the Roots supercharger is simply the best way to go. I am sure there are some who will disagree."

There is an error in the above. Here is the correction: "The limitation is that their boost increases as the square of the engine RPM. When set up for 18 pounds of boost on an engine with a 7000 RPM redline it will only provide 4.2 pounds of boost at 3500 RPM."

 

I know that I have a lot less hp than you lot but I cant believe mine have done 200 passes now without breaking one

Have you got the factory lsd or quaife unit??

 

Dang, thats cruel .

 

I have the quaife.

 

REVOLUTION MINI WORKS

Could you post pictures of this project??

 

This thread is an offshoot of the orginial project X-300 thread. At the risk of sounding like a jerk why not use the search feature here at NAM for X-300 and see if there is other info....

If anyone bothered to do so they would find this tread... https://www.northamericanmotoring.co...ighlight=x-300

 

Here is also a youtube of the sound

http://www.youtube.com/watch?v=imZ38UMqIr8

 

i would much rather talk to the vendor then use the NAM search

 

So the rotex is a centrifugal SC ?

 

Yes, the stock SC is a roots type.

 

.

 

reading the august 2007 issue of super street they address the differences of the roots type SC and centrifugal SC. Michael Ullrich, stillen. States that centrifugal SC have alot of negative aspects of a turbo and fewer positve aspects of a roots type Sc. Mainly because they produce peak power. I am by no means Bashing what revolution is doing, I just read more bad then good on centrifugal SC's

 

Thats what i was looking to hear, Thank you sir

 

Yes and No.

Here are some quotes from Rotrex:

Compared to traditional centrifugal superchargers, the Rotrex unit offers superior boost at lower engine speeds due to its inherent capability to accommodate high speed impeller designs. This virtue is essential for compact applications requiring more torque at low engine speeds than is usually achievable with centrifugal superchargers.

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.

The key advantages of the patented traction drive design are:

* Torque-on-demand
* Speed up to 250,000 rpm
* Efficiency up to 98 percent
* Compactness
* Reliability
* Low NVH

 

Juicy juicy juicy. Can't wait till all the testing is done to see some final results. Any rough estimate of how much the SC kit will cost?

 

ding ding ding, and that would be the majic question

 

So Longboard, what they are saying is that the rotrex is a hybrid of the traditional centrifugal SC? Are they a fairly new company/design?

 

Koenigsegg Rotrex twin charge. 806hp

 

Which model Rotrex is it?

 

Yummy...Koenigseggggggggseggggggggsegggggg

 

HELLO, HELLOOOOOO.

DID SOMEBODY SAY SOMETHING?

I guess not.

Longboard

 

Man.. and I thought I knew a thing or two about superchargers.. this seems to go to a whole new level of automotive jargon... "elastic annulus with a small pre-span to secure contact between the roller planets and the sun shaft"... Is the synthetic fluid like liquid ball-bearings?.. and do I need to change my blinker fluid before installing the Rotrex?