Axial Flow Supercharger
04-23-2007, 04:03 PM
#4976
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.
04-23-2007, 06:00 PM
#4982
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 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.
04-23-2007, 06:12 PM
#4983
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.
.
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.
.
04-24-2007, 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.
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.
04-24-2007, 10:56 PM
#4986
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.
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.
05-01-2007, 02:21 PM
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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.
05-01-2007, 03:13 PM
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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)!
05-01-2007, 03:35 PM
#4993
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
eviltwinkie eviltwinkie is online now
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Quote:
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...
Old 04-25-2007, 03:28 PM
eviltwinkie eviltwinkie is online now
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Quote:
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...
05-01-2007, 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.
On that note: I'll wait for a couple guys to buy it and be guinea pigs, then I'll weigh my options.
05-01-2007, 06:22 PM
#4995
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?
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?
05-01-2007, 07:06 PM
#4996
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.
05-01-2007, 10:16 PM
#4997
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'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).
05-02-2007, 10:17 AM
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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
05-02-2007, 10:35 AM
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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.
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).
05-02-2007, 10:52 AM
#5000
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.