William
I would be interested in learning more about your experience with this plug
swap.
I have been using the 3921 because they are a cooler temperature range plug
than the one that came with the Dakota. They seem to work fine and after 10K
or so, looked much better than the stock plugs that came with the 4.7L.
The concern I have with the +4 4417's is that they are a platinum plug.
According to the good folks I contacted at the DC technical service center,
the platinum plugs have a thin core of platinum that can't carry away heat
as fast as the coppers can. The concern is that the temperature of the COP
(coil on plug) will get too hot and fail.
Is the construction of the core of the +4 4417's different than a typical
platinum? I know that the grounding electrode, all 4 of them, are different
and from any other plug. I also know the spark will only go to 1 of the 4
grounds at any one time. This leads me to wonder if the 4 grounds are a
gimmick to sell plugs or is there something that I have not considered here.
The question that I have not gotten a good answer for is whether the
temperature the plug conducts to the coil will damage the coil like a
standard platinum plug is supposed to do.
I would appreciate any thoughts you or anyone else might have on this
matter. In particular, can you quantify the difference in performance that
you have experienced with these plugs.
Thanks
Patrick O'Day
2000 Dakota 4x4, 4.7L, CC
Profile at www.dakota-truck.net/profiles/dakota/Cy9WFjn1QtCYw/profile.htm
----- Original Message -----
From: "William H. Hiatt III" <william@hiatt.net>
To: <dakota-truck@buffnet.net>
Sent: Saturday, May 12, 2001 10:07 AM
Subject: DML: Autolite 3923 + 4.7
> Ok, last time I'll aska question. I put some 3923's in today, gapped at
> .040, and it doesn't rev nearly as quick as it did with the +4 4417's.
> Maybe it's just me and I'm crazy, and it's in my head, but does that make
> a difference? Thanks alot
>
> william
>
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