Re: Spark Plugs....now could be marelli computer

["Programmer" <nwester@eidnet.org>]

I have to concur--with the exception of reach, and the centres falling
out of Bosch plats, (they're really bad for this) all a plug can do is
provide a gap for spark, and ease of firing spark. I've had equal success
with most manuf's.
Lyndon.

-----Original Message-----
From: Carl Summers <InTech@writeme.com>
To: gmecm@diy-efi.org <gmecm@diy-efi.org>
Date: May 4, 2000 10:36 PM
Subject: RE: Spark Plugs....now could be marelli computer


>Hiya Bruce,
>    I have yet to find any "magic" in a spark plug.....I have used NGK's in
>alot of apps not saying they were better, just that they worked well and
>easy to read....I have also used Autolites and AC's with great success as
>well.....I have used NGK's on anything from 1600cc Toyota's to 2000hp Blown
>Alcohol apps and used them because they were readily available in whatever
>heat range I wanted....I used the 4 prong NGK's on the little hemi toyota's
>for years before the split-fire came out announcing this "new" technology
>and I can say for sure that they don't make any more power than anything
>else they will just last longer in a severe environment.....you can
actually
>see the electrode change from round to square after a full season of use in
>a circle track car(yes some people don't think they need to change thier
>plugs very often in an abusive situation so I made them buy these 4
>prongers) These 4 prong plugs only work well in a rotary or hemi type
>environment in my experiences though....In a wedge type head pick a brand,
>get the heat range correct, index it and run it....you won't find any
>"magic" between brands......I can tell you from experience that fine wire
>Bosch Platinums don't like rich unstable mixtures as in a nitrous
app....and
>in my experiences fine wires don't belong in anything unless it is lacking
>of spark energy.....hth's
>     On another subject, I looked at an Edelbrock standalone EFI computer
>today and it had a Magnetti Marelli computer in it with a 27c256 chip in it
>supposedly burned for a zz4 app....I have a copy of it if anyone is
>interested (off list)....At a glance it appears to be pretty simple open
>loop code maybe even based off of TPS vs RPM but don't know...didn't get to
>see the rest of the hookups but tables appeared to be pretty linear.....has
>anyone here ever dabbled with this????? I'm really not that interested in
>reversing something like this but may come in handy solving a problem down
>the road.....ttyl
>-Carl Summers
>
>
>
>
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>-----Original Message-----
>From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
>Of nacelp
>Sent: Thursday, May 04, 2000 7:57 PM
>To: gmecm@diy-efi.org
>Subject: Re: Spark Plugs....
>
>
>The three electrode (think it was 3) NGK is the only plug I ever got to
work
>well and live inna rotary.
>I'll try any plug a couple of times (if it's some one else's money, or they
>know so much that they are already installed), but I'm not out to prove a
>point, if in a couple tries they don't work, then to me it's pointless to
>spend time, when I got other solutions.  I'm sure some guys have great luck
>with various things I can't get to work right, er well, maybe they don't
>split hairs as often as I do looking for the best answer.   Like my
attitude
>toward MSD, maybe if I ran a little richer, that would drop the required
>firing volatge down enough for them to live.  OK, but why should I
sacrifice
>HP to make a point?.  If someone is happy with their MSD, fine well and
>good.  Just I haven't had one live very long, with a really well tuned car.
>   From this and other sources, I've heard problems with various devices,
>and if I hear of a certain ecm that kills IAC drivers, and  the
>manufacturuer doesn't stand behind them well, that to me is theift.
>   I gotz no axe to grind.
>Grumpy
>   Still looking for the perfect spark plug BTW.
>
>
>
>> Geez--you hate Rdfire and NGK ?? Oh well...
>> LW
>> -----Original Message-----
>> From: nacelp <nacelp@bright.net>
>> To: gmecm@diy-efi.org <gmecm@diy-efi.org>
>> Date: May 4, 2000 11:52 AM
>> Subject: Re: Spark Plugs....
>>
>>
>> >Those are trash to in my opinion.
>> >But, no, I know the difference.
>> >Grumpy
>> >
>> >
>> >> You're not confusing Rapidfire with Splitfire are you ?
>> >>
>> >> Lyndon
>> >> -----Original Message-----
>> >> From: nacelp <nacelp@bright.net>
>> >> To: gmecm@diy-efi.org <gmecm@diy-efi.org>
>> >> Date: May 4, 2000 6:36 AM
>> >> Subject: Re: Spark Plugs....
>> >>
>> >>
>> >> >
>> >> >> They were Rapidfire #5's.
>> >> >> This is the description... Any spark plug readers out there?
>> >> >
>> >> >Once ya get rid of these then try reading a decent plug.
>> >> >If your running a stock car, with no mods., they might work for over
a
>> >100
>> >> >miles.
>> >> >I farted around with them several times in hot rodded engines and the
>> >> always
>> >> >were prolemmatic.
>> >> >Forget all the hype and just get a decent conventional plug.  For the
>$
>> >of
>> >> >the trick ones you can afford several sets of good plugs.
>> >> >If seriuos about tuning index em.
>> >> >Bone white generally indicates lean, too hot of plug.  But, I've had
a
>> >> >properly tuned engine do that with several different heat ranges of
>> >> >Rapidfires.
>> >> >ACs or Autolites are usually the best.
>> >> >Rotaries use NGK.
>> >> >MB Porsche like Bosch
>> >> >IMHO
>> >> >Grumpy
>> >> >
>> >>
>>
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