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Old 09-14-2002, 03:55 AM   #1
Imprezer
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Talking TEC III coils are definetely much more powerfull

So today I was trying to figure out if I connected the plug wires wrong and pulled one of the plug cables from the spark plug. I pulled it too much and got zapped with a nice fatty blue spark. After that I got dazed and felt pretty damn shocked. I didn't move for few seconds while I realized what happened. My index finger still twitches.

Now, with the stock coils, I got shocker many many times. It just made me giggle.

-------------

TEC III coils are no giggling coils. The sure do zap queit well.



-Alex
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Old 09-14-2002, 04:17 AM   #2
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... edited. Alex. can you remove this. Thanks
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Old 09-14-2002, 04:19 AM   #3
Eric SS
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Interesting. Are they available for the 2.5RS (98-01)? Have you seen a difference on the dyno because our stock coils are quite powerful as it is.

Eric
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Old 09-14-2002, 04:47 AM   #4
XT6Wagon
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Hmm, thats strange, and here I am thinking the TECIII has sissy coils. The Stock SHO coils threw a hotter spark, and when that was coupled with a MSD DIS4-HO box, it would throw a nice multi-fork arc well over a foot.
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Old 09-14-2002, 10:50 AM   #5
subarud
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Quote:
I got shocker many many times. It just made me giggle.

Alex~ BTW could you post some pics of your car when you are done?!...I'm very anxious to see the beast in full (instead of all these little snapshots). When will it be done?

~Evan
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Old 09-14-2002, 11:31 AM   #6
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When you absolutely, positively have to beat every MF in the room...

TEC3

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Old 09-14-2002, 11:36 AM   #7
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So what you're saying is I shouldn't see if they work by touching my tongue to it (you know, like you do with 9volt batteries)?

I work with alot of high-voltage electronics (tube amplifiers). Nothing like taking 650 volts across your body (arm to arm), and coming to on the floor.. Man, you know, I always feel really really good after that happens. And people said electroshock therapy is cruel? No way! Sign me up!

jb
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Old 09-14-2002, 01:01 PM   #8
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while unscrewing my batter connection my right elbow came a little close the strut tower. Needless to say ... I got a bit of a shock. I couldn't move my forarm for about 10 seconds or so.
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Old 09-14-2002, 04:27 PM   #9
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Quote:
Originally posted by JenisonWRX
while unscrewing my batter connection my right elbow came a little close the strut tower. Needless to say ... I got a bit of a shock. I couldn't move my forarm for about 10 seconds or so.
uh... a 12 volt shock isn't that bad is it?
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Old 09-14-2002, 04:55 PM   #10
XT6Wagon
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12V is plenty to KILL YOU. Lets put it this way, you can weld with a battery and some nice large cables. Just have to get the amps up there and you can do some damage.
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Old 09-14-2002, 05:44 PM   #11
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12 volts can't hurt you.
Go open you hood and grab both contacts of the battery. Feel anything?
Ever heard of V=IR
The I part is what you have to worry about. .1A will kill you dead. Luckily our body is a poor conductor so our resistance is high (the R part in the formula). It's on the order of hundreds of thousands of ohms. That means you need thousands of volts (the V above) to get enough amps to hurt you.

Alex got zapped by the coil packs. Their job is to up the voltage so you can get a good spark. They can zap you real good; if they can provide the needed amps they could probably kill you if you grabbed one right.

The reason you can weld with 12 volts is because you’re welding metal (a good conductor). The ohms through that system are down in the tens of ohms so you can draw a huge current.

When I do minor electrical work on my house I prove I'm a real man by not turning the power off (110 Volts) . I've gotten some good shocks with sweaty hands and across my body. My arms felt numb for a second but I'm still around. When I was young my sister and I used to get our hands real sweaty and grab bare telephone wires. When the phone rings the voltage jumps to 90 volts. Good fun.
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Old 09-14-2002, 05:49 PM   #12
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It's not the voltage that kills you... it's the amperage. As little as .1 amp (100 milliamps) can stop your heart.

It's fairly difficult to recieve a perceptible shock from a 12 volt source, as the normal dry resistance of your body is a bit too high to draw even .001 amps from 12 volts...

But when you're playing with ignition systems, you're not dealing with 12 volts. Ignition coils are just that - coils. Coils are a purely inductive load, and they tend to oppose a change in current flow. When a coil is "charged" at 12 volts, there's xx amount of current flowing through it. That current flow generates a magnetic field (magnetic lines of flux) around the coil. If you instantly take away the 12volt source, the magnetic field will collapse in an attempt to maintain the same amount of current flow. This causes amazingly high voltages to be generated (commonly called inductive kick). Those high voltages are what make a spark jump across the gap of your spark plug. If you happen to be holding a plug wire or coil terminal and are the recipient of that voltage... ouch!

Now here's where the TEC3 is *so* cool... if it only takes 400 volts to arc across the spark plug gap, the tec coils only generate 400 volts, but they do it for an amazing length of time. Generally 20 times longer than a stock ignition system.

Normal ignition systems spark once, discharge/waste all their energy, and are done. Now all combustion in the cylinder must rely on flame front propagation to drive the piston.

Some aftermarket systems spark multiple times per combustion event.

TEC systems make more power because, in addition to flame front propagation to force the piston down (hehe... or "in" in our case), the air/fuel mixture is exposed to a *much* longer spark, giving a more complete, more forceful burn.
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Old 09-14-2002, 05:55 PM   #13
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To expound on the post above my last one...

Normal body resistance is around 300,000 to 500,000 ohms (depending, of course, on a huge number of factors...)

Introduce wet clothes, sweaty skin, increased levels of electrolytes in your body (post workout), etc, and body resistance can drop to as low as 300 ohms. (But that's truly worst case scenario...)

It would take at least 30 volts for your 300 ohm body to draw enough amperage to kill you.

Hehe... I've been shocked by 22,500 volts before! Now *that's* enough to make a body hurt...
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Old 09-14-2002, 06:04 PM   #14
XT6Wagon
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Well, also recall that it takes less Voltage to keep a current going once it starts. So if you get a nice arc going its then easier to keep it going.
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Old 09-14-2002, 07:31 PM   #15
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Quote:
Originally posted by XT6Wagon
Well, also recall that it takes less Voltage to keep a current going once it starts. So if you get a nice arc going its then easier to keep it going.
Most welders (at least the ones I've worked on) have an unloaded/arc voltage of 75-90 volts, and drop to 10-12 once they arc.
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Old 09-14-2002, 08:01 PM   #16
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Quote:
Originally posted by Austin
It's not the voltage that kills you... it's the amperage. As little as .1 amp (100 milliamps) can stop your heart.

It's fairly difficult to recieve a perceptible shock from a 12 volt source, as the normal dry resistance of your body is a bit too high to draw even .001 amps from 12 volts...
and that is exactly what I meant. You just don't get shocked by a 12Volt system. there just isn't enough current flow through your high-resistance body to even feel. Jenison must have gotten some static or something.
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