Axial Flow Supercharger
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From: portland oregon
Originally Posted by r0tor
there is a reason why fuel strategies in the oem ecu have long term and short term fuel trims as well as linking for non-closed loop areas in the map to closed loop areas of the map.....
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Joined: Apr 2003
Posts: 9,134
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From: Houston
Originally Posted by Richard Paul
I'm going to answer this and that will be all I'm going to say. I don't want a pissing contest between RG and myself. That was not my intention.
I also am fully secure in knowing that Scott and his unit both have the ability to tackle any tuning issues that can arise on a rotary. I have compete confidence in him and his abilities. I know you only had a belt issue. That took time and he was very busy with other cars while he was there. That was the whole point. I never implied that your car had massive problems elsewhere. Had Scott been given more time, he'd have gotten it tuned. Guaranteed. Sometimes it takes an hour to tune, sometimes it takes several. You spend as much time as is necessary to get it right.
Originally Posted by Hymee
We are at the two hundred and thirty second page. 
Cheers,
Hymee.
Cheers,
Hymee.
brilliant!!!!
btw.
you got mail... let me know the date you get it...
beers
always preoccupied.
Joined: Feb 2005
Posts: 827
Likes: 1
From: Kirkland, WA
Originally Posted by Longhornxtreme
After a 10 month hiatus I decided to come back...
What's the scoop on the AFSC? Any luck? Or is it still ECU problems?
What's the scoop on the AFSC? Any luck? Or is it still ECU problems?
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Joined: Apr 2003
Posts: 9,134
Likes: 26
From: Houston
Originally Posted by Longhornxtreme
After a 10 month hiatus I decided to come back...
What's the scoop on the AFSC? Any luck? Or is it still ECU problems?
What's the scoop on the AFSC? Any luck? Or is it still ECU problems?
Any pics? Useless w/o em~
Joined: Jun 2006
Posts: 648
Likes: 0
From: Santa Monica (L.A.), CA
Hey all, newbie here ^^; 
I believe this thread started as a source of input so here's my 2 cents:
I LOVE the idea of an AXIAL flow supercharger. I've grown up hating massive superchargers and been in favor of turbos; my last car was a Mitsu 3000GT VR4 (V6 TT). But with my love for jets, and love for my 8, and the idea of putting an AFS/C in it, AND how compact/simple (relatively) it is, I'd put my name down to buy one tomorrow!
Having said that and...
taken the advice of looking back 10 pages (not devoted enough to read 3472 indepth/complicated posts) I've questions.
Most importantly: 1). Any projected completion date? Possible release date?
2). Any hp gain numbers yet?
3). Will it be air cooled, water, or not?
4). What r the latest unit cost numbers?
Basically just the... basics. Hope it comes close to production soon!
I believe this thread started as a source of input so here's my 2 cents:
I LOVE the idea of an AXIAL flow supercharger. I've grown up hating massive superchargers and been in favor of turbos; my last car was a Mitsu 3000GT VR4 (V6 TT). But with my love for jets, and love for my 8, and the idea of putting an AFS/C in it, AND how compact/simple (relatively) it is, I'd put my name down to buy one tomorrow!
Having said that and...
Originally Posted by dDuB
Might wanna just read the thread. At least go back like 5-10 pages and start reading from there.
Most importantly: 1). Any projected completion date? Possible release date?
2). Any hp gain numbers yet?
3). Will it be air cooled, water, or not?
4). What r the latest unit cost numbers?
Basically just the... basics. Hope it comes close to production soon!
Any pics? Useless w/o em~
Joined: Jun 2006
Posts: 648
Likes: 0
From: Santa Monica (L.A.), CA
Originally Posted by rotarygod
It's in the car and running. Trying to work the bugs out of it. No solid numbers yet.
Originally Posted by Wing5
Hey all, newbie here ^^;
I believe this thread started as a source of input so here's my 2 cents:
I LOVE the idea of an AXIAL flow supercharger. I've grown up hating massive superchargers and been in favor of turbos; my last car was a Mitsu 3000GT VR4 (V6 TT). But with my love for jets, and love for my 8, and the idea of putting an AFS/C in it, AND how compact/simple (relatively) it is, I'd put my name down to buy one tomorrow!
Having said that and...
taken the advice of looking back 10 pages (not devoted enough to read 3472 indepth/complicated posts) I've questions.
Most importantly: 1). Any projected completion date? Possible release date?
2). Any hp gain numbers yet?
3). Will it be air cooled, water, or not?
4). What r the latest unit cost numbers?
Basically just the... basics. Hope it comes close to production soon!
I believe this thread started as a source of input so here's my 2 cents:
I LOVE the idea of an AXIAL flow supercharger. I've grown up hating massive superchargers and been in favor of turbos; my last car was a Mitsu 3000GT VR4 (V6 TT). But with my love for jets, and love for my 8, and the idea of putting an AFS/C in it, AND how compact/simple (relatively) it is, I'd put my name down to buy one tomorrow!
Having said that and...
taken the advice of looking back 10 pages (not devoted enough to read 3472 indepth/complicated posts) I've questions.
Most importantly: 1). Any projected completion date? Possible release date?
2). Any hp gain numbers yet?
3). Will it be air cooled, water, or not?
4). What r the latest unit cost numbers?
Basically just the... basics. Hope it comes close to production soon!
and this really is a genuine ?
i will give it a stab...
i know just what is in the thread and i have read it all.
release date. when it is done..
hp gain. no #s but rp is looking for drivable and fun not 1/4 times..
air cooled water cooled... no. the afs is efficeint... no intercoolers. that is like a page or two back.
cost.
rp wants to make it affordable...
this is just me paying attention to this thread, i could be wrong... i am not the spokesperson. and have not meet rp...
btw, rp... pm me if this is not accurate...
beers
Any pics? Useless w/o em~
Joined: Jun 2006
Posts: 648
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From: Santa Monica (L.A.), CA
Originally Posted by swoope
release date. when it is done..
hp gain. no #s but rp is looking for drivable and fun not 1/4 times..
air cooled water cooled... no. the afs is efficeint... no intercoolers. that is like a page or two back.
cost.
rp wants to make it affordable...
hp gain. no #s but rp is looking for drivable and fun not 1/4 times..
air cooled water cooled... no. the afs is efficeint... no intercoolers. that is like a page or two back.
cost.
rp wants to make it affordable...
hp gain: whole heartedly agree; if that's what i cared about i'd have bought a different car. definitely the tracker type here not stripper
intercooler: shweet
cost: good idea lol the "3500 to 3700" mentioned in the first post is about the most id pay tho. any more and it'd b 1/4 of what i paid buying the car
Thanks!~ a
4 u
RP, does it not matter what angle you have the MAF positioned at? My guess is it does not, but why did Mazda place it on top of the intake. I noticed yours is 90 degrees to this.
Last edited by Nemesis8; Jun 13, 2006 at 01:05 PM. Reason: I cannot spell
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Joined: Oct 2005
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From: Ely, UK
I know on some cars it will change the AFR a litle bit.. Maybe up to a half point up or down depending on how it is... I think if it is upside down it will read a little rich.... Or something like that.
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Joined: Apr 2003
Posts: 9,134
Likes: 26
From: Houston
With a mass air flow sensor it makes no difference. With an air flow meter it does. An air flow meter uses a spring loaded flapper door. Based on it's position, gravity will affect how easily it opens. A maf is just a hot wire that doesn't move so it's position doesn't matter.
Originally Posted by rotarygod
I have a little exercise for you. Put a turbo in an oven. Does it spin? Now blow cold air through it. Does it spin?
There is a lot of heat in the exhaust system however it isn't the heat that is doing the work on a turbo. It's the flow. Heat plays an important part though in that it affects turbo exhaust wheel/housing sizing. This is because hotter air takes up more space than colder, denser air. The hotter the air is, the larger the turbo's hotside needs to be to flow it efficiently. This is why the rear mounted turbos need smaller exhaust wheels. The exhaust gasses are cooler and take up less space. Even though the turbo is sized differently, based on the temperature and energy present in the exhaust gasses, they are the same restriction to the system from a functional standpoint.
Yes it is true that the turbo helps remove some heat from the exhaust system. It gets absorbed by it and transferred into the oiling system, housings, and in some turbos back into the cars cooling system as not all turbos have coolant lines on them. It also radiates this heat back into the engine bay. None of it gets used to make power. Only the flow does that.
Your dad's plane sounds pretty cool. There are many rotary powered RV8's flying around and yes I agree that they do get the mileage you say they do. For a small plane, they are pretty damn fast. Light and powerful is a good combo. That plane will make the average Cessna look like a truck in the performance department.
There is a lot of heat in the exhaust system however it isn't the heat that is doing the work on a turbo. It's the flow. Heat plays an important part though in that it affects turbo exhaust wheel/housing sizing. This is because hotter air takes up more space than colder, denser air. The hotter the air is, the larger the turbo's hotside needs to be to flow it efficiently. This is why the rear mounted turbos need smaller exhaust wheels. The exhaust gasses are cooler and take up less space. Even though the turbo is sized differently, based on the temperature and energy present in the exhaust gasses, they are the same restriction to the system from a functional standpoint.
Yes it is true that the turbo helps remove some heat from the exhaust system. It gets absorbed by it and transferred into the oiling system, housings, and in some turbos back into the cars cooling system as not all turbos have coolant lines on them. It also radiates this heat back into the engine bay. None of it gets used to make power. Only the flow does that.
Your dad's plane sounds pretty cool. There are many rotary powered RV8's flying around and yes I agree that they do get the mileage you say they do. For a small plane, they are pretty damn fast. Light and powerful is a good combo. That plane will make the average Cessna look like a truck in the performance department.
The inlet of the exhaust side of a turbo is smaller than the outlet. Just like the turbo adds heat when it compresses, it cools off the
RotoRocks Powered
Joined: May 2006
Posts: 1,236
Likes: 6
From: Delray Beach, FL
Originally Posted by Wing5
date: damn lol
hp gain: whole heartedly agree; if that's what I cared about i'd have bought a different car. definitely the tracker type here not stripper
intercooler: shweet
cost: good idea lol the "3500 to 3700" mentioned in the first post is about the most id pay tho. any more and it'd b 1/4 of what i paid buying the car
Thanks!~ a 4 u
hp gain: whole heartedly agree; if that's what I cared about i'd have bought a different car. definitely the tracker type here not stripper
intercooler: shweet
cost: good idea lol the "3500 to 3700" mentioned in the first post is about the most id pay tho. any more and it'd b 1/4 of what i paid buying the car
Thanks!~ a
4 uIf you had paid attention, on this thread or anywhere else, people normally don't discuss price tags openly. Why? Possibly there is a reason for that. I don't know, but whatever it is, please take this sort of questions to Richard directly. I am sure he'll be more than happy to provide you with the price quote and elaborate on the details of it. He did so with me and it didn't even take more than a couple of hours to get a reply from him via email.
This thread is about the Axial Flow SC and related sometimes even quite far from cars, but still related technical topics.
It is not an online parts shop, so let's keep it that way. Sorry to be this way, but I had to go through all the posts to get here, not just the last 10 pages. and to be honest, I learned more from this about Physics and aerodynamics and all kinds of other stuff than I did when I was in college (well maybe not, but it is all coming back now
). So take a few hours (Or a few days) an read some more. In my opinion this car deserves an owner who can truly understand its soul and nothing less. This forum and especially threads like this one and the one that Hymee runs are exactly what we need to get the understanding of the magnificent machines we own. P.S and I am not bullshitting...
cheers