I don't think you are going to get a HP increase just from the plugs alone.
You have to improve the spark with a aftermarket coil/ignition system before
thinking of increasing the HP factor (this may include remapping the
timing/fuel).
--------------------------------------
Steven St.Laurent
C4i System Engineer
C4i Engineering Branch, PSD, MCTSSA
MARCORSYSCOM, U.S. Marine Corps
Office (760) 725-2506 (DSN Prefix: 365)
"Never be content with somebody else definition
of you. Instead, define yourself by your own beliefs,
your own truths, your own understanding of who
you are. Never be content until you are happy with
the unique person GOD has created you to be."
-----Original Message-----
From: crm [mailto:tb.crm@verizon.net]
Sent: Monday, June 03, 2002 8:21 AM
To: dakota-truck@dakota-truck.net
Subject: DML: Re: Spark Plugs: Autolite
Canuck,
I was in the same situation. I finally decided on the 5224's. As I did some
more reading and researching, it seemed the 3923's are geared more towards
the 318/360. The 3923's would work but I think the main difference is how
long the nose is. I was not experiencing any ping/knock, so the shorter nose
of the 3923 (along with more fouling etc) wasnt necessarily needed.
I dunno much about the "quality" factor, or the main reason the Autolites
seem to be preferred. I did hear back from some people running the 5224's
and heard they got better idling/slight mileage increase, but for the
average guy without a dyno there isnt really a way to document a 4-5 HP
increase. The preference might be due to the fact that Bernd saw 4-5HP
increase running the 3923's, but that wasnt on a 4.7. And as you prolly
already know, the 4.7/5.x dont always respond the same to the same mods. Or
it could just be that Autolites are cheap and worth a shot.
I am keeping my expectations kinda low, knowing that everything needs to
work together to make a noticiable difference. They will get installed this
weekend when I put on the Z tube and scope out the TB for a change once
Fastman gets back in the shop. I'll let you know how it turns out...
-adam
----- Original Message -----
From: "Canucker Trucker" <mal5@ualberta.ca>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Monday, June 03, 2002 9:50 AM
Subject: DML: Spark Plugs: Autolite
>
> Sorry to open up this can of worms again, but I still haven't found a
solid
> consensus on this question:
>
> Which is better for the 4.7L Dak's, the Autolite 3923 or the 5224???
>
> Also, just FMI (for my information), what is it about Autolites that
> everyone prefers? Are there other brands of plugs that are comparable???
>
>
> Thanks in advance!
>
> --
> Canuck
> --------------------------------------------
> Y2K 4.7L 2wd 5spd
>
>
>
>
>
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