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

[Carl Summers <InTech@writeme.com>]

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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