> > The subject is resistor vs non-resistor plugs. Correct me if I'm > wrong, but I believe resistor plugs are used for the suppression of > radio interferance (static). I don't think any one could tell the > difference in performance between the two. I know I couldn't in > other bikes. > > We can purchase non-resistor plugs in Canada, but why bother. If any > one can provide a reason and evidence, than I am willing to give them > a try, otherwise I'll stick to the resistor plugs as specified. > > As for these other products that claim to be so great, I have a hard > time believing that such improvements are possible. Show me side by > side comparisons which support their claims, and then I would think > about them. There are hundreds if not thousands of products that have > been aimed at the automotive market over the years, which make > outrageous claims. They succeed in convincing thousands of people, > then disappear from the market never to be heard from again. > >
[dsn_klr650] about cops nklr
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- Posts: 205
- Joined: Thu Apr 06, 2000 3:03 pm
[dsn_klr650] spark plugs, resistor/nonresistor
sorry, i forgot to put a '' to make it obvious my canadian comments were
tongue in cheek. i had no desire to offend, but will all the foolishness on
this list lately, i guess i was frisky.
anyway...
i read the following in an article by some SandiaLabs scientists (full
article available on http://www.directhits.com/AdvAutoIgnSys.asp
**********************************************************************
It is useful to model the circuits and compare the energy transferred to the
spark with varying amounts of resistance in the high voltage section of the
circuit. Figure 1 shows a schematic of a typical capacitor discharge
ignition system. Representative parameters for conventional and three
different power enhanced ignitions are shown in TABLE 1. Note that
Conventional ignition circuits have high resistance in the secondary side,
often as much as 25 K ohms, which limits transfer efficiency to the spark to
around 0.2%.
By replacing the 5K ohm resistor plug with a non-resistor type, the transfer
efficiency increases to 10% due to the 10 pF capacitance of the plug
discharging directly into the spark. This simple exchange of components
illustrates the function of a peaking capacitor. By increasing the
capacitance to 80 pF the transfer efficiency increases to nearly fifty
percent (50%).
If the circuit analysis is repeated using a low resistance transformer, the
transfer efficiency is consistently higher than with a standard spark coil.
A comparison of transfer efficiencies using standard ignition coils and low
resistance transformers and various circuit configuration is shown in Table
1. The highest transfer efficiency for any system results when there is
virtually no resistance between the secondary capacitance and the spark and
when low resistance rf suppression wire (50ohms/ft) is used.
*********************************************************************
the middle paragraph is what caught my eye. i'm no electrical engineer, so i
may be missing something.
by the way, there are a number of side by side comparisons in the tech data
on the direct hits website, and they seem to support their claims, which
don't seem that outrageous to me. it's not like magnetic gasoline densifiers
or some crap like that. go to http://www.directhits.com/TechData.asp. (i had
to page through the product section to get there).
Recall that we got onto some of this in the first place because one of our
listers, who seems like an intelligent fellow, reported a significant
increase in gas mileage using a product that (i think) is claiming to
increase the transfer efficiency to the spark, which sounds to me like it's
similar to what happens when you switch to a non-resistor plug. that's what
sparked my question.
-mark weaver
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- Posts: 1083
- Joined: Thu Apr 06, 2000 6:16 pm
[dsn_klr650] about cops nklr
Amen. The cops thread is dead.
Russel'r DSN_klr650@egroups.com
Subject: [DSN_klr650] About Cops NKLR
Enough about cops. Those of you who chose to disregard the laws will
certainly have bad experiences with Law Enforcement. I think the foul
language, threats and racist comments need to stop. Take it somewhere else.
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