Axial Flow Supercharger
04-21-2005, 05:18 PM
#1703
Originally Posted by california style
why is the test car disguised as a ghost?
That is the way they come from the factory. It is a stick-on covering to protect the finish in shiping. The dealer removes it in new car prep. My car has not been prept. I don't think it has been to this day and it's on the truck to me now.
Guess I get to do it myself which I don't mind. The less people crawling around in it the better.
04-21-2005, 06:37 PM
#1704
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Will your AFS Have these same problems????
I am going to post a quote found in the fuel economy for supercharged/turboed 8's
Just wondering if the supercharger you are designing will have these same problems/characteristics.
The quote is from a turboed RX8
"The boost starts at 3000 RPM, and when you are cruising at 75-80 mph we are right around 4000 RPM, so the turbo is running. Not much but it is twirling so heat is building up. Since it was on cruise control, I was not giving it any throttle. Just went to high 70's set the cruise control on, & watched the EGT gauge. It steadily moved up about 200 degree C, and I decided to turn it off. It is the fact that our cars are running at 4000 RPM in 6th that the turbo is not good for the CC, unless you are doing under something like 65 mph. Like you said, we need a 7th gear, or we can't really use crusie control for the turbo."
:D
Just wondering if the supercharger you are designing will have these same problems/characteristics.
The quote is from a turboed RX8
"The boost starts at 3000 RPM, and when you are cruising at 75-80 mph we are right around 4000 RPM, so the turbo is running. Not much but it is twirling so heat is building up. Since it was on cruise control, I was not giving it any throttle. Just went to high 70's set the cruise control on, & watched the EGT gauge. It steadily moved up about 200 degree C, and I decided to turn it off. It is the fact that our cars are running at 4000 RPM in 6th that the turbo is not good for the CC, unless you are doing under something like 65 mph. Like you said, we need a 7th gear, or we can't really use crusie control for the turbo."
:D
04-21-2005, 08:40 PM
#1707
RPM is not the only thing affecting the boost. When you are cruising, the throttle is only partially open. In fact, there is no "boost" at all, but probably some manifold vacuum.
As for EGT's, I'm not sure what he was measuring, but the cat gets up to 1000 degrees C without much problem.
Cheers,
Hymee.
As for EGT's, I'm not sure what he was measuring, but the cat gets up to 1000 degrees C without much problem.
Cheers,
Hymee.
04-21-2005, 10:00 PM
#1708
This is typical of a blow through turbo system. You are still spinning the turbo even if your throttle is closed. There will be no manifold pressure as the engine is using more mass then the throttle lets in. Therefore vacuume. But you still are restricting the exhaust so heat will build up. There is in all likelyhood room for safe operation and you may be panicing early.
The point is made though about turbo heat, it has to go someplace. You need the heat, remember that is what is driving the compressor. But from this you see that it is not free energy as some like to claim.
If they were to use a drawthrough type system this action would be reduced somewhat. In my system this in not going to happen at all. We have no connection to the exhaust so we build no heat there except when we produce more power. During cruise with the axial flow system the engine acts just as it did before. It has no way of knowing there is a supercharger on board. Idling in the vacuume of the duct between the TB and the ports it takes no power, does not effect fuel mileage.
It is my intent to leave the entire fuel and spark system intact. It will control the engine just as it did before the SC install. When the manifold goes positive the auxilury injectors add fuel as needed for the extra air. The spark timing is something I haven't worked out yet. That will be the only place I see some sort of piggyback computer controls. At the present time I think we can use full timing with street boost.
The added homoginization of the axial flow blading is going to benifit the rotary more then it does the piston counterpart. Just think how much mixing can be done by hundreds of blades going hundreds of MPH. All reacting against static blades facing the opposite direction.
Back to your question, no this system will not do what your turbo is doing.
The point is made though about turbo heat, it has to go someplace. You need the heat, remember that is what is driving the compressor. But from this you see that it is not free energy as some like to claim.
If they were to use a drawthrough type system this action would be reduced somewhat. In my system this in not going to happen at all. We have no connection to the exhaust so we build no heat there except when we produce more power. During cruise with the axial flow system the engine acts just as it did before. It has no way of knowing there is a supercharger on board. Idling in the vacuume of the duct between the TB and the ports it takes no power, does not effect fuel mileage.
It is my intent to leave the entire fuel and spark system intact. It will control the engine just as it did before the SC install. When the manifold goes positive the auxilury injectors add fuel as needed for the extra air. The spark timing is something I haven't worked out yet. That will be the only place I see some sort of piggyback computer controls. At the present time I think we can use full timing with street boost.
The added homoginization of the axial flow blading is going to benifit the rotary more then it does the piston counterpart. Just think how much mixing can be done by hundreds of blades going hundreds of MPH. All reacting against static blades facing the opposite direction.
Back to your question, no this system will not do what your turbo is doing.
04-22-2005, 09:57 AM
#1710
Originally Posted by california style
I tihnk because the Queen Mary did solo transatlantic troop runs, avoiding all the U Boats (cos she was so fast).
Just a theory tho.....
Just a theory tho.....
She was painted dull grey. And your right she was fast. But with British fog and all grey was invisable. Cut right through her escort once. The ship was zig zaging and in the fog crossed in front of the QM, tee boned him, cut 'em in half.
We are looking for a good name for the shifter.
One night she was passing Gibralter and a watch command came on the radio asking "What ship, what ship"? The captin insulted by not having the QM profile obvious radios back "What rock, what rock"??
04-22-2005, 11:18 AM
#1711
Londons Yellow Peril
I would use something like :
"Richard Paul Sport Shifter" or "Axial Flow Sport Shift"
as short shifter is kinda missleading, and i have seen / heard people saying "well it doesnt look much shorter." Emphasises the quick shifting. 'Race' might seem too hardcore and off putting.
"Richard Paul Sport Shifter" or "Axial Flow Sport Shift"
as short shifter is kinda missleading, and i have seen / heard people saying "well it doesnt look much shorter." Emphasises the quick shifting. 'Race' might seem too hardcore and off putting.
04-22-2005, 06:21 PM
#1715
Registered
Originally Posted by John Corbitt
How about, I need a link for US delivery.
John
John
it's under products at the top.
