Axial Flow Supercharger
Nothing that will thrill you. We are bench testing four different compressor designs right now. We are now owners of a new Rx8 on which the first install will be done.
I wish we would have started with the S2k first though, it will be a lot easier job. This damn Mazda ECU is a real challange. Nobody has done what could be called a completly satasfactory job of controling added air/fuel.
The good news is once we have beaten that thing we can breeze through the Honda.
BTW I've been driving the Rx8 and also a freinds S2k with which we developed the shift kit and I find them both a lot of fun. I think they are as different as they are the same. The only way to choose is going to be to have both. It's a perfect blend, your wife/gf gets to drive the one you don't feel like driving. If you need the back seat or want to go someplace a little more formal take the 8. If it's sunday driving in good weather take the S. You can tell her it's my fault, I talked you into it.
I wish we would have started with the S2k first though, it will be a lot easier job. This damn Mazda ECU is a real challange. Nobody has done what could be called a completly satasfactory job of controling added air/fuel.
The good news is once we have beaten that thing we can breeze through the Honda.
BTW I've been driving the Rx8 and also a freinds S2k with which we developed the shift kit and I find them both a lot of fun. I think they are as different as they are the same. The only way to choose is going to be to have both. It's a perfect blend, your wife/gf gets to drive the one you don't feel like driving. If you need the back seat or want to go someplace a little more formal take the 8. If it's sunday driving in good weather take the S. You can tell her it's my fault, I talked you into it.
Originally Posted by Richard Paul,Jun 5 2005, 08:34 AM
BTW I've been driving the Rx8 and also a freinds S2k with which we developed the shift kit and I find them both a lot of fun. I think they are as different as they are the same. The only way to choose is going to be to have both. It's a perfect blend, your wife/gf gets to drive the one you don't feel like driving. If you need the back seat or want to go someplace a little more formal take the 8. If it's sunday driving in good weather take the S. You can tell her it's my fault, I talked you into it.
Read some of this, and I'm replying to mark it to finish it later.
I just love reading this stuff. I've always considered myself fairly intelligent, but you people are from another universe. Very impressive.
I just love reading this stuff. I've always considered myself fairly intelligent, but you people are from another universe. Very impressive.
Richard looks like you are still having problems with the RX-8 and Mazda is dragging there feet to get it fixed.
Hope you get this fixed real soon.
Here's an idea
put the RX-8 on the side for now and get your self /borrow a S2000 to work on.
Hope you get this fixed real soon.
Here's an idea
put the RX-8 on the side for now and get your self /borrow a S2000 to work on.
Richard
With the S2000 If the Air box is removed there is a substantial area could be used if the AFSC is mounted to the block in front of the engine.
My Idea (not replacing the current intake plenum)
1) Mount the AFSC in line with the block. Effectively placing the axial inlet toward the front of the car and the radial outlet out to the side with a short tube connecting the outlet to the area where the original throttle body was.
2) Mount the new/modified throttle body on the front of the AFSC with the new injector(s)/ new fuel line from the fuel rail.
3) Run a new tube from the inlet side/new TB location out to the side giving one the ability to make any custom piping necessary to run the filter in front of the Radiator/ front lip ram air/scoop.
The AFCS could be placed anywhere (L/R) in the engine bay depending on where one would need to access the belt/pulley assemblies for AFSC drive power.
Advantage of this idea very simple install mostly a couple of bolts, tagging the fuel rail, and changing the pulley belts/adjusting tension.
I could see this only taking a couple of hours to install/uninstall (should something break tyranny or diff).
S2KI guys:
Which way does the S2000 spin if looking at it from the front of the car? Clockwise / counterclockwise?
Richard
Which way does the AFCS need to spin if the axial inlet if facing front and a radial outlet is to the side.
With the S2000 If the Air box is removed there is a substantial area could be used if the AFSC is mounted to the block in front of the engine.
My Idea (not replacing the current intake plenum)
1) Mount the AFSC in line with the block. Effectively placing the axial inlet toward the front of the car and the radial outlet out to the side with a short tube connecting the outlet to the area where the original throttle body was.
2) Mount the new/modified throttle body on the front of the AFSC with the new injector(s)/ new fuel line from the fuel rail.
3) Run a new tube from the inlet side/new TB location out to the side giving one the ability to make any custom piping necessary to run the filter in front of the Radiator/ front lip ram air/scoop.
The AFCS could be placed anywhere (L/R) in the engine bay depending on where one would need to access the belt/pulley assemblies for AFSC drive power.
Advantage of this idea very simple install mostly a couple of bolts, tagging the fuel rail, and changing the pulley belts/adjusting tension.
I could see this only taking a couple of hours to install/uninstall (should something break tyranny or diff).
S2KI guys:
Which way does the S2000 spin if looking at it from the front of the car? Clockwise / counterclockwise?
Richard
Which way does the AFCS need to spin if the axial inlet if facing front and a radial outlet is to the side.
We are looking at it that way now. Good thinking. We can build the blower to turn whatever way we want. Just mirror image the blades. A few other things change but not hard. The engine turns clockwise like most all other engines except Honda front drive until '04. The ones that had the pulleys on the driver side were backwards. Then they turned it around. Why Honda does these things nobody knows.
The efficiency if this design will not require an intercooler.
The air flow path would be
1 air filter inlet
2 Throttle body
3 Fuel added Post TB before supercharger
4 air/fuel axial inlet to the supercharger with fuel from the new additional injector
5 aerodynamic compression inside the supercharger
6 axial outlet of the supercharger
7 into the intake plenum
8 intake runners/standard fuel added with stock injectors
9...ect
A intercooler is not required for this supercharger up to about 8to 9psi due to the efficiency of aerodynamic compression. nothing is 100%efficent
There will be a temperature rise but some of that temperature rise will be counter acted by the homogenization of the fuel as it goes through the supercharger. (check out link on page 5 of this thread that goes to he RX-8 forum).
The thought is that due to the efficiency of the compression and the addition of the fuel as the air charge is compressed no intercooler will be needed and it even possible the spark timing will not need to be pulled.
The air flow path would be
1 air filter inlet
2 Throttle body
3 Fuel added Post TB before supercharger
4 air/fuel axial inlet to the supercharger with fuel from the new additional injector
5 aerodynamic compression inside the supercharger
6 axial outlet of the supercharger
7 into the intake plenum
8 intake runners/standard fuel added with stock injectors
9...ect
A intercooler is not required for this supercharger up to about 8to 9psi due to the efficiency of aerodynamic compression. nothing is 100%efficent
There will be a temperature rise but some of that temperature rise will be counter acted by the homogenization of the fuel as it goes through the supercharger. (check out link on page 5 of this thread that goes to he RX-8 forum).
The thought is that due to the efficiency of the compression and the addition of the fuel as the air charge is compressed no intercooler will be needed and it even possible the spark timing will not need to be pulled.




