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Axial Flow Supercharger

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Old Apr 23, 2007 | 04:03 PM
  #4976  
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Originally Posted by murix
Nice peak power and torque, but being a centrifugal on a high rev peaky motor, there is not much of a usable power band there. I am not very keen on the torque band.
yeah I agree, but I would like to test drive it to see for myself
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Old Apr 23, 2007 | 04:04 PM
  #4977  
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From: Sunny See attle
Do you guys want to start your own thread on this. We should keep this one focussed on the RP Axial Flow Supercharger.
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Old Apr 23, 2007 | 04:20 PM
  #4978  
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Lennart - those results look good & are worth discussing - but not on this thread .
Please start another one .
Cheers
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Old Apr 23, 2007 | 04:29 PM
  #4979  
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I don`t know how to open a "new thread" and move these posts, maybe someone else can do it.
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Old Apr 23, 2007 | 04:33 PM
  #4980  
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just click on "major horsepower upgrades" forum . The "new thread" button in on the left half way up the page .
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Old Apr 23, 2007 | 04:38 PM
  #4981  
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Charlie can help - paging Zoom44 paging Zoom44
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Old Apr 23, 2007 | 06:00 PM
  #4982  
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Originally Posted by Lennart
Here is my result on Dynapack dynamometer. I live in Sweden and bought DNA Supercharger last summer, built it in this Winter and are on a testday this friday.
I have ReAmemiya spark plugg wires and header and Turbo X exhaustsystem for race. Engine is stock and ingood condition.

I wouldn't respond to this if it was not on my thread BUT:
First of all eu dynos are programed to read out an adjusted flywheel HP.
You should also state the correction factor.
Lets not argue that right now because the graph is wrong no matter what.
HP and torque are connected as in the equation: Tq x RPM / 5252 = HP.
Thus they do not follow each other and they must cross at 5252 RPM.
I didn't bother but you might try that equation at some points on the graph.

Other then that congradulations on your installation. I'm sure the car is alot more fun to drive.
BTW you didn't say who's ECU you're using.
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Old Apr 23, 2007 | 06:12 PM
  #4983  
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Originally Posted by Richard Paul
Lets not argue that right now because the graph is wrong no matter what.
HP and torque are connected as in the equation: Tq x RPM / 5252 = HP.
Thus they do not follow each other and they must cross at 5252 RPM.


.
could be because he has torque in NM and power in HP - different scales .....
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Old Apr 23, 2007 | 06:23 PM
  #4984  
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this is the ecu that comes with the kit richard..

http://www.dnamotorsport.com.au/

beers
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Old Apr 24, 2007 | 10:16 PM
  #4985  
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Originally Posted by Richard Paul
I wouldn't respond to this if it was not on my thread BUT:
First of all eu dynos are programed to read out an adjusted flywheel HP.
You should also state the correction factor.
Lets not argue that right now because the graph is wrong no matter what.
HP and torque are connected as in the equation: Tq x RPM / 5252 = HP.
Thus they do not follow each other and they must cross at 5252 RPM.
I didn't bother but you might try that equation at some points on the graph.

Other then that congradulations on your installation. I'm sure the car is alot more fun to drive.
BTW you didn't say who's ECU you're using.
Check your PM BOX.
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Old Apr 24, 2007 | 10:56 PM
  #4986  
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From: QLD .au
IMO I would have liked lennart's dyno results to stay in this thread for future reference. (there is so much off topic stuff already)

I think it will be interesting to compare the results from other centrifugal superchargers like the DNA/procharger and the knightsports rotrex, with the axial flow.

the way I have viewed the reactions to the axial flow design, is that most followers are hoping for the axial flow supercharger to deliver good boost down low. possibly expecting a result similar to a positive displacement SC.

I'm not sure who posted that the axial flow's boost response was similar to a centrifugal SC. if it is indeed more akin to a centrifugal blower, I would like to make a comparison between them to see the advantages and disadvantages of both.

even if the axial flow ends up being very similar in performance to a centrifugal SC, the packaging and installation pictures of the axial flow SC are enough to make me choose it over the centrifugal kits out there already.
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Old Apr 26, 2007 | 12:08 AM
  #4987  
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I'm waiting for RP
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Old Apr 26, 2007 | 12:17 AM
  #4988  
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From: Y-cat-o NZ
Originally Posted by Nemesis8
I'm waiting for RP
hope you are young .......
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Old Apr 26, 2007 | 08:09 AM
  #4989  
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Originally Posted by Brettus
hope you are young .......
RP could be my brother maybe...

Have you devised a way to pull cooler air from the front of the car yet? Like maybe making use of the RB intake piece?
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Old Apr 26, 2007 | 01:48 PM
  #4990  
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cut a hole in the bumper
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Old May 1, 2007 | 02:21 PM
  #4991  
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I'm sure you're busy Richard. You have a lot of people who can't wait to be customers. Keep the midnight oil burning to get this product to market. I'm ready to order the day it becomes available or earlier.
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Old May 1, 2007 | 03:13 PM
  #4992  
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Hey Richard. I used to work with David at Boeing (left 6 months ago) on the A160. Coolest and most knowledgeable boss I've ever had and now I can see where he got that from. I remember him telling me about the AFSC and how cool it was. Glad I found this thread. Can't wait to see the sc when it all done (and I don't even have a RX8)!
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Old May 1, 2007 | 03:35 PM
  #4993  
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The holdup right now from my understanding of the situation is a proper EMU. In order to keep costs down and make the whole thing affordable (increasing market share) is to wait for the release of the Cobb Access Port which would allow us to utilize the Mazda PCM and tune it for the AFSC. Below is the current status as given by Trey from the Cobb forums. I for one would rather that the kit be sold w/o an EMU for those who already have an EMU (Interceptor) to install/tune thier own kits. When the AP is released by Cobb then make a kit which utilizes that. Anywho...moving on...


Old 04-25-2007, 03:28 PM
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Originally Posted by Trey View Post
As for release time, I've been discussing it quite a bit with our engineering staff and everyone is confident and willing to do whatever it takes for a summer release. For those that are software or electrical engineers, that time frame came from the developers...not their boss (me). So, that means it should be accurate, right?

Thanks for the patience, everyone!
Trey @ COBB

Actually...That usually means that they are going to shoot for the summer and probably end up being delayed until fall...you should always add fudge factor to a developer estimate...
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Old May 1, 2007 | 04:27 PM
  #4994  
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can't wait to see the AFSC actually come out! Hmm, maybe have it ready by SevenStock 10??

On that note: I'll wait for a couple guys to buy it and be guinea pigs, then I'll weigh my options.
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Old May 1, 2007 | 06:22 PM
  #4995  
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Off-Topic again:
I don't know what the hold up with Cobb is. The specs for the ODBII connector and the bus are a standard. Cobb stated that the EMU is very similar to that of the Subaru that they have lots of experiance with. They stated that they can do bench flashing of the EMU. They have had RX8s for testing and I have to assume create standard flashes for.
I must be missing something. What is left?
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Old May 1, 2007 | 07:06 PM
  #4996  
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The software interface from my understanding...they hired some developers to create the gui...more than likely we will not see the access port hand held unit but instead a software package on a PC via a cable.
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Old May 1, 2007 | 10:16 PM
  #4997  
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Originally Posted by eviltwinkie
The software interface from my understanding...they hired some developers to create the gui...more than likely we will not see the access port hand held unit but instead a software package on a PC via a cable.
Well, that sucks if its not going to be the access port hand held unit. Software development can be very tricky and full of bugs.... Software developers are famous for delays, bugs, and more delays...

I'm not understanding why it would be an advantage to go the PC and cable route. Obviously, there might be things that the accessport can't do, but the PC and software can.... but what is it???

I think that if they really can't make this year (which is close to half over), that the AFSC should be released anyway. At least people with the Int-X can play with it, until Cobb finally releases their solution (via Accessport or PC w/ cable).
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Old May 2, 2007 | 10:17 AM
  #4998  
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Richard never intended for this to be a play with it/tuner type of kit. From my earlier understanding in the thread this is going to be as close to a set it and forget it kit as you can get. Which is just fine by me
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Old May 2, 2007 | 10:35 AM
  #4999  
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Originally Posted by eviltwinkie
The software interface from my understanding...they hired some developers to create the gui...more than likely we will not see the access port hand held unit but instead a software package on a PC via a cable.
I shouldn't need to post this for you, since you're on the Cobbforum and have responded, but again, straight from Trey:

Not too long after we release the AccessPORT for the RX-8 we hope to have the professional and street Tuning software available. That way you can have the car custom tuned to your particular setup, extracting maximum gains. Our mapping will work very well on most cars, but in order to do so we have to consider the averages. Not all cars are the same so if we tune for absolute maximum power on one car, those settings will likely not be ideal for another.

There's been no indication from Trey, or anyone that works for him, that it will not be the AccessPORT. The only exception to this is members on this forum claiming that they are in-the-know and that it won't be (I'm not specifically referring to you).
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Old May 2, 2007 | 10:52 AM
  #5000  
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Yep I saw that...and hopefully I am wrong. The info I have gathered leads me to believe that we will be seeing a dongle+software package first. But since I dont work for them and no one really knows what is actually going on...we'll just have to see. The handheld tuner would make life easier for sure.
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