heaudio12385 posts03-12-2020 3:40pm2300 psi is for a specific fuel type, mixture, starting air temperature, and rate of compression. It is a good rule of thumb in typical diesel engines with typical fuel. Rep
Yup we are on the same page. If you think about it 2300 psi is the magic number. No matter how we get there. Clean initial starts, after that it's pretty amazing what the new stuff does (digital injector control)
But back to the speaker wire vs spark plug wire. may prove to be an added sound nugget in a speaker cable construction, I mean tungsten, sc nickel/silver, sc copper, pure silver, pure copper, clades of all kinds stranded, multi-multi-stranded, solid core, networks, dielectric material jacketing, all are now being understood. BETTER. I mean just listen to the quality of sound reproduction today vs the 70-80-90. Because of good cabling and SOME speaker designers
Just keep on asking questions, there's always a solution.
This is true about dieseling and in fact if you put a drop of oil on the back of a high performance air gun pellet, the heat generated by the rapidly compressed air in the chamber will ignite the spot of oil and increase the pressure of the shot..., maybe to the point of splitting the barrel.
Yup all kinds of crazy things, and their worried about (gunpowder) guns on the street. (or nitrocellulose is the proper term). Crack me up..
WHAT NOT TO DO!!!!! DON'T DO THIS EVER...
Oil on the end of a thumb, and turn up the o2 on an OX AC cutting torch put your thumb over the end, NO THUMB. BOOM. I saw the results in a training film. poor guys' thumb was just a stub.
Still I don't think your off the spool carbon core spark plug wire is a good option for speaker wire. MS SS never know, may be the new craze.
. 2300psi is a relatively meaningless number that represents a very specific set of conditions w.r.t. initial air temperature and fuel type. It is not, in any way, form, or function a definition of "diesel" (nor have anything to do with this conversation.
The conversation no, the meaning yes. An engine that fires under compression combustion, (diesel) requires 2300 psi to achieve that. Whether by charging the combustion chamber with ADDED air and then by piston compression or by simply, sucking it in, close the valves and compressing the chamber. Fuel is added via injector at a given time, and a given fuel pressure, either BTDC, TDC, or ATDC. This is an analog system, PT as in cummins. (yes oversimplified answer, but I'm a simple Retired Master HD Mechanic) YES it is old school.. The spark plug thing was at best oversimplified. I do appreciate you updating me on the wire thing... Interesting. I'm was a Detroit, Cummins, Deutz and Cat engine certified. Yup Yup. Been a while though, I'm retired now. thanks for your input though.
So the new spark plug wires sound like a 20,000.00 speaker cable in the making. After all the stuff I read about, networks, tungsten, white gold, nickel silver, why not add SS and carbon to the mix?
This is true about dieseling and in fact if you put a drop of oil on the back of a high performance air gun pellet, the heat generated by the rapidly compressed air in the chamber will ignite the spot of oil and increase the pressure of the shot..., maybe to the point of splitting the barrel.
oldhvymec, When I need some help with RF design or mitigating RF noise, I don't consult my mechanic. Ditto when I need help with fluid dynamics.
"Still using multi-strand wire" ? .... I think your knowledge is either limited or out of date w.r.t. spark plug wires. Modern high performance spark plug wires are a single strand of typically thin stainless wire coiled (variable spacing) around a core of fibreglass or similar, but sometimes around a secondary conductive core of carbon. The stainless wire being thin is resistive, just like a carbon conductor, but you also have a helpful and controllable inductive component, plus as you can space the coils, you can better control conductivity over length. From the NGK website for example, "NGK ignition wire sets are engineered to meet strict OEM tolerances
using variable pitch wire winding, creating resistance to radio
frequency interference." You can also consult the image on this page: https://www.holley.com/blog/post/plug_wires_build_them_right/, or this one: https://www.musclecardiy.com/wp-content/uploads/2016/05/107.jpg. With modern cars having high output per displacement, and fuel efficiency/emissions requirements, advanced construction like this is now common.
cavitation: Rapid forming and collapsing of vapour pockets, sort of like on the wall of a moving diesel cylinder, but hey.
The definition of diesel is rapidly heated air reaching a suitable temperature to ignite fuel, but hey, why get hung up on semantics. That of course differs from dieseling where you do have heating due to compression, but can have a lower ignition temperature due to the hot spot in the combustion chamber. 2300psi is a relatively meaningless number that represents a very specific set of conditions w.r.t. initial air temperature and fuel type. It is not, in any way, form, or function a definition of "diesel" (nor have anything to do with this conversation).
Spark plug wires are not suited for audio. They come mostly with resistive material that inhibits RF so it does not cause popping sounds in the car radio.
heaudio12329 posts03-03-2020 4:58pmI am not aware of any fixed resistor in ages, and copper, not in forever except for racing, and even then you want to control the Most domestic wire is not simply a fiber glass core covered in carbon filled latex. Most are variable spaced fairly high resistance stainless wire. They variable spacing is so they can have consistent performance independent of wire length, hence why today you buy vehicle specific wire sets (or should). Don't pick some random site on the web for your information. Most mechanics won't have a clue about the inner working of spark plug wires.
And you are a mechanic? I am. The reason for the carbon wire is radio interference, primarily emergency. You can still tell when someone is running multi strand wire, pull up beside them you'll hear it through your AM or FM radio stations. Most hot rodders that have MS wire DON'T have or use a stereo while running. The old MS wire was OK speaker wire at best. A LOT of insulation for HIGH voltage 15-25 for the old point/condenser style, and 50+ for HEI, can really bite you.
Better off insulating a piece of solder, hee hee. I mean where do you people come up with these ideas? LOL
It's the thought that count's RIGHT..
spark to prevent fuel cavitation.
Cavitation in a hydraulic term referring to a pressure drop on the suction side of a hydraulic pump, where pockets of current atmosphere, form bubbles. Those bubbles actually collapse and carve out the cavity pre chamber to a pump. Same with hydraulic Motors, You can hear cavitation..tearing up a pump.. restricted lines, pump and motor killers.
The spark is controlled to prevent air/fuel PRE DETONATION. ..A fuel KNOCK or RATTLE is caused normally by a carbon build up that gets so hot it PRE DET. due to excessive advanced timing (BTDC) a Fuel rattle. Shutting off an continuing to run (DIESELING), again glowing carbon, particles with a fuel and air supply, BUT NO controlled spark, Firing under pressure, dieseling.
The definition of a diesel is simple 2300 psi, it will not be a diesel without it. NOTHING ELSE.. 2300 psi.. You can obtain 2300 psi a few different ways... Different story..... See learn something every day...
I know I use to teach engines gas/diesel 101 201, 301. Yup yup That was a while back...NOT MOTORS ok....ENGINES..
@rixtherick - they sound nice and open. They seem a bit more mellow than what they replaced, but they are brand new. They replaced Kimber PBJ’s which seemed to have a bit more upper mid range bite.
*L* Understood....I bruise if you look at me Hard...
Oh, and Thanks for the 'unique' comment. *S* Like Leonard Cohens' Bird on the Wire (note my little pic), paraphrased: "I've tried in my way to be free..."
Plug wires, coat hangers.....exhorting a whole new level of audio esoteria, hmmm? And you're saying I'm sans meds?
(Actually, the only ones of late are the Rx'd variety from the cardio kidz. I keep harassing them to 'legal' medmary, It'll let me keep it out of the lungs of those who would just....abuse it.....:( I do it happily as a public service....)
"...I'm open to fall from grace...", however...;) But the local PD has no humor, and the 'likely suspects' suspect I'm an unusual narcotics officer....
@geoffkait , Actually, you spend most of your time in *our* future, which would be your present. Tell me, does everyone have terrific hair in the future??
Amazon interconnects are cheep but OK quality. I would not waste your time or possibly cause damage to your gear. As long as you have two conductors per interconnect you are good. Next would be the shielding. Is it good enough? I am more worried about your system.
I do believe asvjerry, in his "unique" style of writing, is lampooning this thread by melding and likening them to an announcer’s overzealous advertising spots for drag racing, stock cars, and monster trucks. Either that, or he forgot his meds again...
I work on old Porsche’s. I was installing new wires on my 944 Turbo last weekend. The next day I made some interconnects with Duelund wire. The soldering iron was next to where I placed the old spark plug wires. Imagination took over from there. Voila, question;)
Say who has better sparkling high fidelity speaker wires? Nascar or NHRA? AutoZone or Riley Autoparts? Will carbon resist electron puddling? So many things to consider here!
I am not aware of any fixed resistor in ages, and copper, not in forever except for racing, and even then you want to control the spark to prevent fuel cavitation. Most domestic wire is not simply a fiber glass core covered in carbon filled latex. Most are variable spaced fairly high resistance stainless wire. They variable spacing is so they can have consistent performance independent of wire length, hence why today you buy vehicle specific wire sets (or should). Don't pick some random site on the web for your information. Most mechanics won't have a clue about the inner working of spark plug wires.
Not very well if the wire is of type 1) distributed (carbon core) or 2) fixed resistor. They have more resistance than copper to reduce RFI interference. It does not matter at 100,000 volts in the car but it does in an amplifier.
Most domestic vehicles use spark plug wires with a fiber glass core covered in latex graphite, which provides between 10,000 and 12,000 ohms of resistance per foot of wire. But this varies with wire type
Do you really want to put all of that resistance in the signal path???
You could do it. It would probably sound awful with most spark plug wires. Most spark plug wires are highly inductive (and resistive) stainless steel wire around a core that may or may not be conductive carbon. I guess if you like your music really warm, you may like them :-)
I spend most of my time in the future. I only come back here for the jokes. Besides, they don’t have audio forums in the future. The trolls got too out of control.
“The Nanofiber main strength is its exceptional midrange purity (we feel the midrange is absolutely as open as with the Indra - the flagship of STEALTH analog interconnects). The Nanofiber offers first class overall presentation: excellent speed, very good midbass and deep bass performance, sweet treble - but this sweet treble is not extended enough to qualify for the reference level - i.e. truly complete with the Indra when it comes to critical listening. However, there is one area where the Nanofiber actually outperforms the Indra: these pure carbon cables offer the least "listening fatigue" of all cables we have ever tested (our own and other brands). In our opinion, the Nanofiber is the best choice for pure listening pleasure - all by itself, or in combination with the Indra or the Metacarbon. If you like the Quad ESL loudspeakers, then you are most likely to prefer the Nanofiber to any other cable.”
Wouldn’t work for interconnects. There is only one conductor covered by a very high voltage rated insulation. You need two conductors for an interconnect. A supply and a return.
Yes but the real MacGyver would know this and use two spark plug wires. Connected to a distributor so you could switch components really fast. Not only that but supply and return? The real MacGyver would know that’s plumbing not electrical. You’re not even on the right aisle.
But a carbon core wrapped in helically wound OFC copper wire (2 per interconnect) that they sell for making spark plug wires might sound pretty sweet. You’d need one heck of a wide plug, though...unless you direct soldered it.
Wouldn’t work for interconnects. There is only one conductor covered by a very high voltage rated insulation. You need two conductors for an interconnect. A supply and a return.
Next problem the conductor is usually made of compressed carbon powder. Carbon is not a good low resistance conductor for low signal voltages. Jim
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