Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

Will the x16 kill premix

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 04-17-2008 | 09:10 PM
  #26  
robrecht's Avatar
Registered
 
Joined: Dec 2003
Posts: 1,932
Likes: 0
From: Hunterdon County
Originally Posted by MazdaManiac
They didn't "make it". They prototyped it.
Really, its just a casting change. Its not like its a big deal when you operate your own foundry.
The Renesis is just a differently machined REW with "advances" that were experimented with 20 years ago when it comes down to it.
Rotary engines were designed and advanced on a shoe-string budget compared to the expenditures for the big manufacturers. They exist mostly because of the efforts of dedicated, enthusiastic and motivated individuals at Mazda.
All of those Samurai are gone now.

With the high BSFC, the terrible emissions, the stringent CAT life requirements and, frankly, the lukewarm reception of the car buying public for an under-powered coupe that sits at the bottom of its market, there really isn't any reason to make the 16X.
The only reason that the RX-8 still exists now is to amortize the tooling investment cost. Even the "update" was just meant to help keep the collision dollars in-house.

I'd love to be wrong, but between Kyoto and gas prices, there will be no market for the RX-8 or anything similar in 2 years.
I'm afraid you're right, but hope you're wrong. Maybe my head's in the sand, but if the current price of oil is largely a buble market, when it bursts things may get a little more normal. The Iraq war instability drove up the price of oil to about $60/barrel but since then it's been mostly speculation and declining markets elsewhere (eg, housing). I don't know how true that is, but it makes some sense. If a new administration finds a way to leave Iraq, maybe things will calm down even more. I don't want to have to think about politics when I'm out driving around in my RX-8.
Old 04-18-2008 | 03:54 AM
  #27  
swoope's Avatar
Zoom-Freakin'-Zoom
iTrader: (5)
 
Joined: Jan 2004
Posts: 14,602
Likes: 36
From: orlando, fl
4 bucks a gallon is getting ready to change everything..

but it will be great to have what we have and play with it for fun.

btw, i hear carriabou make great turbo blankets!!!!



beers

Last edited by swoope; 04-18-2008 at 03:56 AM.
Old 04-18-2008 | 08:34 AM
  #28  
olddragger's Avatar
Registered
iTrader: (3)
 
Joined: Apr 2004
Posts: 10,828
Likes: 38
From: macon, georgia
the "real" leaders in America are trying to do a slow wean from gasoline by the general public. The price of gas will continue to rise--slowly--so to not cause chaos--but to cause an increasing difficulty in using it. This is to help motivate and change this gasoline dependance we now have. Keep your eye out for 2010.
Dont ask me how I became aware of this. But, also, dont say someone didnt did not warn you.
The rotary is dead as far as a mass appeal. The hydrogen concept is WAY off, mainly because of it costs more to produce and distribute than the it does with other fuels.
It is up to us to have fun while we can.
olddragger
Old 04-18-2008 | 08:36 AM
  #29  
rotarygod's Avatar
Registered
 
Joined: Apr 2003
Posts: 9,134
Likes: 25
From: Houston
If gas hits $4 a gallon I'm going to start riding a scooter or motorcycle to work and I get 35+ mpg in a Civic. Enough is enough. The RX-7 will forever remain a play car that rarely moves as a result.
Old 04-18-2008 | 09:43 AM
  #30  
Raptor75's Avatar
Thread Starter
Registered
 
Joined: Sep 2005
Posts: 1,364
Likes: 2
From: Chicago
Mazda Maniac makes some very good points, some I had not even thought of. The word is we are also seeing the last of the V8's in the current muscle cars. That being said, I'm a be fan of "Never say never" The Rotary is a natural for a high-bread. It's light weight helps negate the increase wight of the electrical drive system. It's lack of torque is well complemented by the eclectics high torque. The biggest problem is no one has ever put out a high bread aimed at the sports car market.

Another thought would be a way to recapture the heat lost through the exhaust. BMW is working on just such a system and with the rotaries higher exhaust temperature this would be a good fit.

Now I know these are all hypothetical suggestions and I do believe the future will belong to small displacement, FI, direct injected vehicles or diesel's but there is enough new ideas out there to keep hope alive as slime as it may be.

So from a completely hypothetical view I wounder about premixing and the x16.
Old 04-18-2008 | 09:49 AM
  #31  
dillsrotary's Avatar
jersey fresh
 
Joined: Dec 2005
Posts: 3,688
Likes: 0
From: Boston, MA
outside of the discussion of whether the engine will see the light of day, Direct-injection greatly increases the PSI that the fuel is set to inject by, what effects would this have on Premix added to the system?
Old 04-18-2008 | 09:57 AM
  #32  
rotarygod's Avatar
Registered
 
Joined: Apr 2003
Posts: 9,134
Likes: 25
From: Houston
The rotary won't go on and it isn't dead. Not by a longshot. We will continue to see one. The real question is will we see one as the primay powerplant in future vehicles or will it be supplementary to a hybrid system?
Old 04-18-2008 | 10:37 AM
  #33  
Jedi54's Avatar
Administrator
iTrader: (7)
 
Joined: Mar 2004
Posts: 22,444
Likes: 2,797
From: The Dark Side
Originally Posted by rotarygod
If gas hits $4 a gallon I'm going to start riding a scooter or motorcycle to work and I get 35+ mpg in a Civic. Enough is enough. The RX-7 will forever remain a play car that rarely moves as a result.
It's ALREADY $4.00 + here in SoCal. Gas station down the street has premium at $4.07.
Old 04-18-2008 | 12:48 PM
  #34  
mamluk's Avatar
Registered User
 
Joined: Jul 2007
Posts: 12
Likes: 0
Thermoelectrics, look up Peltier and Seebeck effects. See this for some additional info:

http://en.wikipedia.org/wiki/Thermoelectric_effect

There was a company named Melcor (not sure if it is still around) that manufactured devices like this (they moved some of their manufacture to China, they were headquartered in NJ). There was another company in Houston (the name eludes me at the moment) as well as some additional manufacturers. This could be one of the ways (assuming it is not cost prohibitive) to re-use some of the exhaust heat and convert it back into electrical energy (somewhat of a hybrid system). However. the Seebeck effect is not very efficient.

Originally Posted by Raptor75
Mazda Maniac makes some very good points, some I had not even thought of. The word is we are also seeing the last of the V8's in the current muscle cars. That being said, I'm a be fan of "Never say never" The Rotary is a natural for a high-bread. It's light weight helps negate the increase wight of the electrical drive system. It's lack of torque is well complemented by the eclectics high torque. The biggest problem is no one has ever put out a high bread aimed at the sports car market.

Another thought would be a way to recapture the heat lost through the exhaust. BMW is working on just such a system and with the rotaries higher exhaust temperature this would be a good fit.

Now I know these are all hypothetical suggestions and I do believe the future will belong to small displacement, FI, direct injected vehicles or diesel's but there is enough new ideas out there to keep hope alive as slime as it may be.

So from a completely hypothetical view I wounder about premixing and the x16.
Old 04-18-2008 | 01:06 PM
  #35  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by mamluk
However. the Seebeck effect is not very efficient.
Peltier is even worse. Gasoline is still more efficient.

Manufacturers, tinkerers and scientists have been playing a shell game with fuels and power sources for years.
It never ceases to amaze me how easily people are fooled (smart people too and, worse yet, our legislators) into believing the hype about one "alternative" or another without understanding net efficiency.

Hybrid cars in general are a good example.
Forget the actual function of the device - have you ever thought about the energy costs and the massive environmental impact of building a hybrid?
By the time the poisonous metals for the batteries are shipped across the Pacific twice to avoid environmental impact laws, you have already consumed more than twice the fuel the car will "save" and poisoned whole regions of China and North America to make the batteries.
Old 04-18-2008 | 01:31 PM
  #36  
mamluk's Avatar
Registered User
 
Joined: Jul 2007
Posts: 12
Likes: 0
Well of course gasoline is more efficient, however with using a thermoelectric device you are simply converting energy (heat) that would be exhausted to the atmosphere to electricity, potentially increasing the overall efficiency of the system. I was not comparing the efficiency of Seebeck to Gasoline (Carnot cycle, or any other similar cycle of your choice), but rather using Seebeck to complement the gasoline engine (reusing some of the waste heat). The system, in this case, is defined as the powering system for a vehicle. In reference to using waste heat to convert back to energy, you would be talking about the Seebeck effect, not Peltier. Peltier and Seebeck are, in a way, reciprocals of one another. The Peltier effect describes using current to create a heat pump whereas the Seebeck effect describes using the dT to create a current. In the sense of converting waste heat into electrical energy, you would be discussing the Seebeck effect. You could use an array of these devices to convert some of the waster exhaust heat back into electricity. Overall, yes the energy gained using these devices would not be very efficient. However, manufacturers must start somewhere. These devices are already in use in such things as satellites, using minute dT's to create minute amount of electrical energy.

The battery issue you discuss is another issue, although a very scientific view of approaching the issue (cost/benefit). I am not arguing for/against the practical use of Seebeck/Peltier devices, but merely throwing out an idea. Smart people being "fooled" depends on your sense of perspective. Copernicus would have once been considered a smart person that had been "fooled". In some instances they turn out to be pioneers and, in others, simply smart people that have been fooled. But that is neither here nor there. This idea is only one of countless that could yield efficiency "increases" through technological development. The question is whether or not it is practical (cost/benefit, etc.). Just ideas to toy with....

Originally Posted by MazdaManiac
Peltier is even worse. Gasoline is still more efficient.

Manufacturers, tinkerers and scientists have been playing a shell game with fuels and power sources for years.
It never ceases to amaze me how easily people are fooled (smart people too and, worse yet, our legislators) into believing the hype about one "alternative" or another without understanding net efficiency.

Hybrid cars in general are a good example.
Forget the actual function of the device - have you ever thought about the energy costs and the massive environmental impact of building a hybrid?
By the time the poisonous metals for the batteries are shipped across the Pacific twice to avoid environmental impact laws, you have already consumed more than twice the fuel the car will "save" and poisoned whole regions of China and North America to make the batteries.
Old 04-18-2008 | 01:54 PM
  #37  
Raptor75's Avatar
Thread Starter
Registered
 
Joined: Sep 2005
Posts: 1,364
Likes: 2
From: Chicago
Yet the technology advances from increased demand. Lithium Ion batteries are relatively non toxic and a new "Extend Lithium Ion" (not to be confused with the marketing term) Battery is on the way in the next year or two. These batteries use a nano silicon string to increase energy store by a factor of 10. Here is an article on a similar nano battery technology in the works.

http://www.nanowerk.com/spotlight/spotid=5210.php

At present I think that turbo diesel are far better alternatives but the hybrids are driving the technology forward and in time the energy consumption issues of production and shipment will shift.

As for poisoning the land you are correct but there are changes under foot. Pollution is starting to cost the Chinese more in health issues then they benefit from ignoring it so they are changing. One of my staff's fathers owns a battery factory in China and gave up making NiCa batteries a couple of years ago because of the backlash the toxins were causing.

You make good point but I don't think you can condemn a whole technology in its infancy. We need to give it some time to mature.



Originally Posted by MazdaManiac
Peltier is even worse. Gasoline is still more efficient.

Manufacturers, tinkerers and scientists have been playing a shell game with fuels and power sources for years.
It never ceases to amaze me how easily people are fooled (smart people too and, worse yet, our legislators) into believing the hype about one "alternative" or another without understanding net efficiency.

Hybrid cars in general are a good example.
Forget the actual function of the device - have you ever thought about the energy costs and the massive environmental impact of building a hybrid?
By the time the poisonous metals for the batteries are shipped across the Pacific twice to avoid environmental impact laws, you have already consumed more than twice the fuel the car will "save" and poisoned whole regions of China and North America to make the batteries.
Old 04-18-2008 | 02:03 PM
  #38  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by Raptor75
You make good point but I don't think you can condemn a whole technology in its infancy. We need to give it some time to mature.
But as it matures, so does gasoline technology - and at a faster rate.
There is a four-fold increase in efficiency available in gasoline just waiting to be unlocked.
Old 04-18-2008 | 04:47 PM
  #39  
olddragger's Avatar
Registered
iTrader: (3)
 
Joined: Apr 2004
Posts: 10,828
Likes: 38
From: macon, georgia
You are right MM--and the world in not short of oil. That is not the issue. The issue is dependence, the issue is greed and the issue is not having yet to maximize the product profit.
olddragger
Old 04-18-2008 | 05:22 PM
  #40  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by olddragger
You are right MM--and the world in not short of oil. That is not the issue. The issue is dependence, the issue is greed and the issue is not having yet to maximize the product profit.
olddragger
Yeah, there is PLENTY of oil. There is enough within the US territories to completely end our dependence on the stone-age fiefdoms of the Middle East.
But Capitalism has its down-side and commodities like fuel are a major source of abuse - especially when the Government interferes with the market the way it does.

There is NOTHING out there with the potential of gasoline at the moment or in the near future.
That is NOT to say that we shouldn't be researching a replacement.
But to ignore the possibilities of the one most-researched and most-developed solution is irresponsible.
Old 04-18-2008 | 05:49 PM
  #41  
Nubo's Avatar
Lubricious
 
Joined: Oct 2003
Posts: 3,425
Likes: 4
From: SF Bay Area, California
Originally Posted by MazdaManiac
There is NOTHING out there with the potential of gasoline at the moment or in the near future.
Say hello to the near future

http://www.motortrend.com/av/roadtes...roadster_video
Old 04-18-2008 | 06:02 PM
  #42  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by Nubo
Say hello to the near future
Nope. Batteries.
Batteries are the most polluting, dangerous and inefficient energy storage devices.
Old 04-18-2008 | 07:33 PM
  #43  
jeffe19007's Avatar
Registered
 
Joined: Aug 2004
Posts: 334
Likes: 0
From: Glendale, AZ
Nano tube capacitors! Back yard solar/thermal plants!

And the 8 will be a collectors item!

Who knows what problems nano particles will cause. Perhaps as much as the miracle of chemicals. No good thing goes uncorrupted.

The price of gas has nowhere to go but up. If it falls due to availability, the same guys calling for a gas tax holiday will raise taxes to promote efficiency. We are going to have European prices, and we will develop their driving habits.

Won't stop the Ferrari owners, and I will save up to drive my 8. Meanwhile I am shopping for a good scooter....

Last edited by jeffe19007; 04-18-2008 at 07:40 PM.
Old 04-18-2008 | 10:38 PM
  #44  
Nubo's Avatar
Lubricious
 
Joined: Oct 2003
Posts: 3,425
Likes: 4
From: SF Bay Area, California
Originally Posted by MazdaManiac
Nope. Batteries.
Batteries are the most polluting, dangerous and inefficient energy storage devices.
That's a broad statement. Maybe throwaway batteries. Maybe not something that will store energy through 100,000 mile service life and beyond, and isn't toxic waste....

http://www.teslamotors.com/blog4/?p=66

keep in mind the pollution generated by exploration, drilling, pumping, transporting, refining, and combustion of petroleum necessary to power an internal combustion car for 100,000 miles.
Old 04-18-2008 | 10:49 PM
  #45  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by Nubo
keep in mind the pollution generated by exploration, drilling, pumping, transporting, refining, and combustion of petroleum necessary to power an internal combustion car for 100,000 miles.
... Still doesn't exceed the power potential of the results.
The waste accrued in the creation of batteries does.
Old 04-18-2008 | 10:54 PM
  #46  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
Originally Posted by MazdaManiac
They don't even advertise the car any more
Somebody doesn't watch SPEED channel
Old 04-18-2008 | 10:59 PM
  #47  
mysql's Avatar
Doppelgänger
 
Joined: Feb 2008
Posts: 3,192
Likes: 1
From: Florida
Originally Posted by MazdaManiac
Yeah, there is PLENTY of oil. There is enough within the US territories to completely end our dependence on the stone-age fiefdoms of the Middle East.
We get most of our oil from nearby countries. We only care about oil in the middle east because oil is sold/speculated on the global market, so if they produce more, we get lower prices.

Here's the top 10 countries the united states gets oil from:

1. Canada
2. Mexico
3. Saudi Arabia
4. Venezuela
5. Nigeria
6. Angola
7. Iraq
8. Algeria
9. United Kingdom
10. Brazil
It would be funny if we sat around not drilling for oil on our own soil till after the other countries ran dry. Maybe the USD will be worth something again. But by then, I kinda doubt the United States will still exist in it's current form.
Old 04-18-2008 | 11:24 PM
  #48  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 26
From: Under my car
Originally Posted by mac11
Somebody doesn't watch SPEED channel
Only when they run the Koni Challenge or the Rolex series.
I can only stand "Pinks" with a bottle of tequila and a Browning semi-auto.

I was talking about main-stream TV where the dollars are really spent, not on specialty cable.
Even on Discovery/Comedy Central/NatGeo/Hitler Channel they only run ads for the 3 and CX-9.
Old 04-19-2008 | 12:10 PM
  #49  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
Originally Posted by MazdaManiac
Only when they run the Koni Challenge or the Rolex series.
I can only stand "Pinks" with a bottle of tequila and a Browning semi-auto.

I was talking about main-stream TV where the dollars are really spent, not on specialty cable.
Lighten up man. Seriously.

I thought pinks was on TNT or TBS or one of the obscure middle channels?
Old 04-21-2008 | 09:30 PM
  #50  
sosonic's Avatar
Registered User
 
Joined: Aug 2006
Posts: 792
Likes: 2
I don't think the 16X will kill premixing. They would program the ECU to inject the minimum amount of oil to pass EPA tests.

So you would need another ECU flash to get back more oil or premixing to adequately protect your engine.

Originally Posted by Raptor75
I still dont think the premix will be as effective here. In the current Engine the fuel/air mixture is carried along part of the combustion chamber before it is ignited. It has time to contact the engine surface to lubricate. With direct injection the fuel can be injected right were combustion will happen allowing less fuel mixture to contact the engine surface. End result is less lubrication.

As to the EPA issue Mazda my have to use technology similar to those in diesels to trap particulates (unburnt oil). Not sure how or if this would work but it seems a good place to start.
I agree with the point that Mazda may look at some type of system to trap particulates and pass EPA emissions. A system that cleans up exhausts enough to pass EPA standards, seems interesting. I've been curious why we have not seen more work on exhaust filters. It also would seem that car companies can leverage this as a way to get more money out of drivers, it they are the one selling and replacing them.

I think Mazda CAN do it, but it would require R&D and internal battles at Mazda. It is hard to say if the Rotary Samurai at Mazda could win out against the bean counters and Anti-Rotary crowd in their company.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Carbon8
RX-8's For Sale/Wanted
42
02-27-2020 08:39 AM
OnebaddRx8
Series I Trouble Shooting
24
08-25-2019 11:34 PM
Digitz0070
Series I Aftermarket Performance Modifications
55
07-25-2017 08:40 PM
R3Dream
Series II Technical and Trouble shooting
48
03-12-2016 01:44 PM
tommy26Germany
Series I Trouble Shooting
11
09-29-2015 10:33 AM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Will the x16 kill premix



All times are GMT -5. The time now is 12:22 PM.