I used the Bosch Platinum +4 plugs. If you have ping these will make it
worse if you don't have ping it will give you ping. I took mine back to
Checker with 100 miles on them. I then got the Champion Truck Plugs, they
were ok but after about 1000 miles the ping was back and stronger than ever.
I have to team with the experts (Bernd and Co.) on this one and say stick
with the Autolite 3924. Best plug I have ever run in my truck. Through all
my mods (Performance PCM, MSD ignition, MSD coil, MSD wires, K&N Gen II) the
plugs have worked well. They are cheap too, got mine for .89 each and have
a .30 mail in rebate per plug. (going to pick up a spare set).
----- Original Message -----
From: "jay & dana" <jay&dana@telus.net>
To: <dakota-truck@buffnet.net>
Sent: Monday, November 27, 2000 5:12 PM
Subject: DML: Re: Observations on spark plugs for the 4.7
> Does anyone have any opinions yet on how these plugs would work on a 97,
> 318?
>
> Thanks
> Jay
>
> -----Original Message-----
> From: Aajaynefour@cs.com <Aajaynefour@cs.com>
> To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
> Date: Sunday, November 26, 2000 11:47 PM
> Subject: DML: Observations on spark plugs for the 4.7
>
>
> >Well,
> >
> >I went plumb loco and bought a set of Bosch +4's (P/N 4418) for the 4.7
> based
> >in part on the comments of a fellow DML'er (forget exactly who) and the
> >claims of Bosch. The fellow DML'er mentioned that the semi-hemi design
of
> >the 4.7 seems to lend itself to the +4 design and that his best track
times
> >were had with this plug. The "open" nature of the plug presents the
spark
> to
> >the air/fuel mixture with less obstruction than a conventional plug
without
> >indexing. Hummm? Seems to work.
> >They don't ping, the idle and pull of the motor is smoother, and the
> >subjective butt-dyno perhaps feels some additional pull.
> >
> >As the search for a good plug for the 4.7 continues I wanted to give my
> >impression of the Bosch +4 plugs. This one might be good.
> >
> >Andrew
>
>
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