autolite plug numbers for iron heads

karolko

Well-Known Member
Joined
Sep 18, 2007
i know this question has been answered in many previous threads, but for some reason i always forget which is which and searching it here has been difficult at the best of times.

Can someone please clarify thewhich Autolite plug ( 23 and 24) is for pump gas and c16

Also could someone also list the comprable NGK plugs to the Autolites.

Thanks in advance,


Adrian
 
I used 24's for stock boost and the 23's for all the rest of the times irregardless of fuel.
 
i know this question has been answered in many previous threads, but for some reason i always forget which is which and searching it here has been difficult at the best of times.

Can someone please clarify thewhich Autolite plug ( 23 and 24) is for pump gas and c16

Also could someone also list the comprable NGK plugs to the Autolites.

Thanks in advance,


Adrian
I use the 23 racing plug with zero issues with pump gas and alky
 
I've been running the Autolite 24 spark plug with a mix of 93 and 116 and alky. The corresponding NGK plug is a UR5.
 
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