Re: [Chrysler300] Spark Plugs
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Re: [Chrysler300] Spark Plugs



Hi, Jonny:

Can you be more specific about the year and application of your 413?  

According to my files, A42 is equivalent to a Champion J12Y (the lower the 
Champion number the cooler the plug, it's ability to transfer heat resulting 
from combustion to the cylinder head quicker than a "hotter" plug. Cooler plugs 
are used in high performance engines.) 


Champion specs for a 413 list a RJ14Y for standard applications and a RJ11Y for 
high performance applications. A J10Y or A32 is recommended for a 1959 300E.

For your info:

R = Resistor plug
J = First prefix letter for thread size - thread reach (3/8 inch) and hex size 
( 13/16 inch)
14 = Heat Range
Y = Gap style - protruding nose

Since R,J and Y are given for a 413, the heat range is determined by 
application. If you run your 300 frequently at high speeds, a cooler plug is 
recommended. If you drive the car occasionally, I would suggest a hotter plug.

Please advise the year, car and carburation: 1 or 2 4-barrel carburators.  Maybe 
we can zero in on the right heat range for you.

Other, more experienced club members may have additional or better information.

Best regards,
Ron Kurtz
E# 292 




________________________________
From: Jonny Mattsson jonny.mattsson@xxxxxxxxxxx quicker 
To: chrysler300@xxxxxxxxxxxxxxx
Sent: Fri, February 18, 2011 3:01:50 PM
Subject: [Chrysler300] Spark Plugs

  

Hi group,
Some time ago,spark plugs questions has been asked,guess I delete them.
However,the 413 engine specifications says Auto-Lite A-32 or Champion J-12Y.
I have a package of Auto-Lite A-42. Can I use them? or what is your choice 
today.

Jonny Mattsson
Sweden


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