[DeTomaso] Spark plugs

[Mike Thomas]

What temp / rating would then be the recommended plug.  When I bought the
set of Autolites I just put in, I asked for plugs for a 72 Mustang with a
351 C.  Didn't look at the box, just gapped them and put them in.  Pulled a
few after about 50 miles and they look fine.

Mike Thomas 

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of cengles at cox.net
Sent: Friday, June 05, 2009 1:52 PM
To: Ian H
Cc: detomaso at realbig.com
Subject: Re: [DeTomaso] Spark plugs


Dear Ian,

I checked with the Autolite Customer Service line. The R stands for Race
application and, in my experience, a colder plug ill suited for street use.
When used on the street they rather quickly foul.

Warmest regards, Chuck Engles



---- Ian H <ihannington286720mi at comcast.net> wrote:
>I figured that the R may stand for resistor, but I thought I ask the
"experts" anyway.

Ian
----- Original Message -----
From: JDeRyke at aol.com
To: ihannington286720mi at comcast.net ; detomaso at realbig.com
Sent: Friday, June 05, 2009 1:54 PM
Subject: Re: [DeTomaso] Spark plugs


In a message dated 6/5/09 4:53:37 AM, ihannington286720mi at comcast.net
writes:


What is the diference between Autolite AF-42 and ARF-42 plugs? The ARF's are
listed for Boss 351, and the AF's are for standard 351 C's.


I'm guessing, Ian (since I haven't called up Autolite's website), but the
ARF-42s are likely resistor plugs while the others are not. The heat ranges
etc should be the same for both. Best guess- J Deryke

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