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TW200 Performance and Customization
Started by Babaganoush at 11-24-2007 4:27 PM. Topic has 42 replies.
 
 
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11-24-2007, 5:11 PM
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JoMomSophat

Joined on 07-12-2006
Seattle WA
Posts 824
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does it store more voltage and release it all at once ? I've heard other plugs that do that (pulse plug) it would work in a slightly richer mix because that is denser and there is more resistance. also higher compression causes more resistance.
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11-24-2007, 6:32 PM
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Fourcycle

Joined on 08-01-2007
SE Michigan
Posts 1,229
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Looking at their literature, they show an “ignition event” with and
without the device. Area under the
curve (energy) is far greater with the device than without it. Oddly, the device has only the energy from the spark coil going
into it. How is it able to create so
much more energy from the comparatively piddly amount of energy it was given by the ignition
coil? In a CDI ignition system the size of the capacitor (C) determines the amount
of energy available for an "ignition event" and C is located inside the CDI module under your seat. Reads a lot like my "rare
earth fuel line magnets" ad copy.
Me? Prehaps an Iridium spark plug.
If your only tool is a hammer everything looks like a nail.
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11-24-2007, 8:35 PM
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JoMomSophat

Joined on 07-12-2006
Seattle WA
Posts 824
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it might have something to do with a reduction in voltage for an increased amprege throughout the ingition event
the oscillo scope could be measuring the amperage or current and not measuring the voltage. as the spark jumps the gap the voltage would spike anyway.
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11-25-2007, 2:52 PM
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Xephius
Joined on 11-06-2007
Houston
Posts 30
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IKAT Thoughts from a tube amp builder's bench...
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After a (very) cursory review of the literature and looking at the docs, and knowing what happens electrically in a system like this, here is my best guess....
The IKAT Gizmo _is_ a coil, they refer to it as such so we know that it is. I would bet that they have tuned the coil to build up and store the energy in the coil field until the electrical resistance of the plug is overcome and the coil collapses providing and "instant" pulse of energy. I will break this down a bit.
When your primary coil steps up voltage to make a spark pulse, it doesn't make a single smooth pulse but rather a dirty jagged pulse. The spark plug "filters" this into a single spark for the most part. In Theory, we want a square wave pulse going to the plug, instant on, sustained until spark goes out. This would insure the best "fire" to ignite your mixture. So in the real world, especially in very simple ignition systems we see a jagged curve of energy sent to the plug. When the plugs internal resistance is overcome, the spark fires (sometimes multiple little times from a single pulse on really "dirty" systems). So by introducing a coil (a choke i this case) into the circuit, the pulse is smoothed, allowing us to get a more "square" wave. Here is how it does that.. When the ignition coil creates its energy it is fed into the IKAT (the choke). They IKAT doesn't allow the energy to pass through the choke because it has to "build" it field. I won't go into this, but it a function of any coil. In this way, the IKAT is acting like a very very fast battery. Now, it would appear that IKAT has engineered their device to match the capacitive resistance (I think that is the correct application of the term, but I am not an ignition guy) of the generic plug size it is being attached too. Meaning, you must have about 10k Volts to jump about 1cm (going from memory), so the IKAT won't discharge its energy (allow its field to collapse) until there is enough energy to create the spark. So lets apply some real world physics to understand why this amazing device looks like its creating more energy than it is given... First, its not. What it is doing is releasing more of the ignitions useable "spark" faster. Yes, faster and here is why. The ignition coil may be throwing enough voltage very quickly to create tiny useless discharges before it builds up enough energy to give that "hot" spark that ignites the mixture. Where as the IKAT will release all of its juice in a single event causing a single big pulse until it can recharge its field. Now, it does not completely collapse its field, and some of the energy is lost to heat and coil field resistance. But it has delivered more usable energy to the plug than without it. I also got to thinking about the timing delay that would be introduced buy the choke, but realized that in truth, it probably advances the timing by providing the "hot" spark sooner rather than after some small spike losses. If I knew more about all the coil valued involved and was able to take some scope measurements, I could probably figure it out, but experience says its probably such a minute variance in time it would take a computer to measure the difference. Now I have over simplified things, and I don't have one of these gizmo's to test on my bench, but I do this exact thing in my tube amps with a standard choke. I use it between my "dirty" rectifier (the coil in this case) and the first big power cap/resister filter (the plug). In the case of my choke application, I don't want the field to completely collapse so it can smooth out the AC pulses to the tubes. Sometime you do want that so you can get "bloom", but that is a different post all together. I hope that I am not too far off base here, I can't see any other way the IKAT can do what it is doing. Sounds like a really cool gizmo. As for its $200 value, I would guess that's not too far off. I spend from $10-30 on a coil custom wound in a factory in mainland China (sub 200 pcs runs). They are wound on standard cores and generally weigh a ton. The IKAT looks to be a custom toroidal core, custom wound with nice silicon cables and a custom molded housing. I would guess they are spending 50-ish per IKAT when it is all said and done. Counting packaging, mold making, shipping ect. That doesn't include that R&D costs. So, $50 to IKAT, double that to the wholesaler, double that to retail and you are at about $200. Again, shooting from the hip, but it seems that they have not over priced the device, and it performs well making it worth every penny they charge. Its going on my to to get list. Now if I can only get Dave to come give me a carb tuning lesson.....
-=John
'02 Harley XL1200 '06 TW 200 '95 TW 200 '03 VStar 650
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11-25-2007, 6:15 PM
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MO1235WP

Joined on 06-05-2007
Warsaw, Missouri
Posts 115
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Re: IKAT Thoughts from a tube amp builder's bench...
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Dave, which of the 3 models did you go with, and does this take a lot of the guess work out of increasing the jet size? In other words, can you reasonably increase the jet sizing and not have to do all the fine tuning? Kind of let the IKAT do the "fine tuning" for you?
Thanks much...
Love many trust few, always paddle your own canoe...
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11-25-2007, 7:18 PM
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rcbuzzb
Joined on 12-09-2006
Posts 46
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Re: IKAT Thoughts from a tube amp builder's bench...
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So what happens if we install one per cylinder in our larger vehicles?
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11-25-2007, 8:58 PM
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Xephius
Joined on 11-06-2007
Houston
Posts 30
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I will jump in as well... BTW Dave, I don't have a degree, so I am sure I am not qualified to pass them out!
On the multiple iKats on single coil vehicles.. It won't make any difference. The purpose of the IKat is to deliver a "clean/hot" single spark, and they will react fast enough to not need individual IKats per cylinder. So if you only have one coil, you only need one IKat. More would just be a waste of money. On multiple coil systems (Late model Harley Davidsons, or cars with coil packs), you will need a IKat per coil. Each coil's ignition curve must be modified and they can't share a single IKat. Dave, on the latest model ignitions, they actually make individual coil packs that attach right at the tip of the spark plug. They look like plastic boxes on the end of a stick that plug into the spark plug. This is just the next gen individual coil ignition systems. They allow for very accurate individual cylinder timing adjustments. Some even use the spark plug as a sensor to trigger the ignition at the optimal time. Its been a while since I have read the white papers on it, but looks like some cool stuff.
As for the IKat fixing bad tuning. No, it won't fix anything, but it will make the ignition more tolerant to of a bad mix. For example, if you are running too rich, causing the flash point of the mixture to go up in temp, your ignition system must hit a hotter spark to set off the compressed gas. Also, if you raise compression you get the same thing. Additionally, if you have a poor mix entering the chamber (non-vaporized fuel held in the air mix <spray>) then it is harder to ignite the mix. SO all that being said, if you have a hotter/stronger spark, your ignition event goes off with less trouble. This makes for crisper throttle response and more HP. What does that mean, no it won't fix your bad tuning, but it will make it less noticeable. Now if you have good tuning, it can really unleash the demon that lives under the valves....
-=John
'02 Harley XL1200 '06 TW 200 '95 TW 200 '03 VStar 650
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11-26-2007, 9:59 AM
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jefmtbkr

Joined on 03-21-2007
Ft Wayne, IN
Posts 290
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Re: IKAT Thoughts from a tube amp builder's bench...
Attachment: duct tape.jpg
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Wow dude your making my head hurt!! I will wrap my head up and try reading that again.
07 TW200 - Brand New-Ran over-rebuilt-now,Bionic TW 00.5 Aprilia Mille, (Sold) 90 FZR1000 (Sold) 73 Honda CL 350-First bike in 1986(sold) Motto-Never let the hardships in life interfere with the pleasures of living!!
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11-26-2007, 6:41 PM
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Fourcycle

Joined on 08-01-2007
SE Michigan
Posts 1,229
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Re: IKAT Thoughts from a tube amp builder's bench...
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John, your description makes a lot of sense!
Inductors do not like to see a change in current and alter their magnetic
filed to maintain it. Big inductors are
used inside DC arc welders to maintain a nice, smooth, forgiving, arc.
I find this interesting

http://www.geocities.com/waterfuel111/water_explosion_menu.aspx
If your only tool is a hammer everything looks like a nail.
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12-11-2007, 10:39 PM
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MO1235WP

Joined on 06-05-2007
Warsaw, Missouri
Posts 115
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Re: IKAT Thoughts from a tube amp builder's bench...
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I may be opening up a can of worms, but is the IKAT anything like the Pulstar Pulse Plug... or vice versa?
http://www.pulstarplug.com/
Thanks in advance
Love many trust few, always paddle your own canoe...
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12-13-2007, 12:58 AM
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JoMomSophat

Joined on 07-12-2006
Seattle WA
Posts 824
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Re: IKAT Thoughts from a tube amp builder's bench...
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I don't know if that would be better or worse ? IKAT + Pulstar ? it is almost an oxymoron the IKAT suggests a longer spark duration while the pulse plug goes for faster hotter spark , it would be a true experiment.
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12-13-2007, 7:33 AM
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Fourcycle

Joined on 08-01-2007
SE Michigan
Posts 1,229
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Re: IKAT Thoughts from a tube amp builder's bench...
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Danger
Will Robinson! Mixing the IKAT + Pulstar
is like mixing Pepsi and Coke!! The
reflected wave between the two, when hitting the 2nd harmonic, will
generate an intense plasma fireball that will breach the insulation and
possibly do serious damage!
Sorry. Just trying to inject some humor.
If your only tool is a hammer everything looks like a nail.
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12-13-2007, 9:16 PM
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MO1235WP

Joined on 06-05-2007
Warsaw, Missouri
Posts 115
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Re: IKAT Thoughts from a tube amp builder's bench...
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Keep us informed with what you find out,
and have a Merry Christmas between now
and then!
Love many trust few, always paddle your own canoe...
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12-13-2007, 9:59 PM
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Xephius
Joined on 11-06-2007
Houston
Posts 30
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Re: IKAT Thoughts from a tube amp builder's bench...
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Putting two coils like this in series probably won't gain you anything. It will start to sap power from the spark at some point, with just two, it probably won't be noticeable because you are really only using the first 2/3 of the "spark" (guessing here). If this were a high compression, high RPM motor, I would say you would be using more of the spark and notice the parasitic loss sooner. But seeing as they both do basically the same thing, you probably won't see anything. Its like putting two noise filters on a signal line, the first one cleans up the signal, the second one, just weakens it. I won't go into detail why I think this unless someone really cares. I only have a theory, feel free to test it... Just not on my bike...
-=John
'02 Harley XL1200 '06 TW 200 '95 TW 200 '03 VStar 650
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12-14-2007, 12:09 AM
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JoMomSophat

Joined on 07-12-2006
Seattle WA
Posts 824
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Re: IKAT Thoughts from a tube amp builder's bench...
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I don't think they are the same, like I said earlier the Ikat is supposed to extend the length of the spark while the pulse plug claims to discharge all its energy in a nanosecond and burn really hot. they might compliment each other or the pulse plug would just negate the Ikat by storing the nice clean long spark and shooting it out all at once.
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Yamaha TW200 Tr... » TW200 Forums » TW200 Performan... » IKAT Spark Enhancer
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