i see "colder plug, but never see a # with this

xscash · 06-18-2006

i have a 89 5.0 with a sn89 supercharger on it. i had no idea i need a colder plug......ok what #.? sorry if i seem stupid...but im not sure which plug would be colder. i am currently running autolite 25
any help would be great
xs

GTRaptor · 06-18-2006

Sample:
stock: APP3924
1 step Colder: APP3923

GTRaptor · 06-18-2006

Sample:
stock: APP3924
1 step Colder: APP3923

xscash · 06-19-2006

thanks rob...ill set it up.
xs

speedytang · 06-20-2006

Autolite #24 since I am guessing your using stock E7 heads and .035 gap

xscash · 06-20-2006

thanks speedy....its that easy? thanks, im off to the parts store.
XS