spark plugs

[turbogus]

hey guys what spark plugs do i need for g n alluminum heads and what gapthanks

 

[bison]

what heads

 

[turbogus]

spakplugs

g n 1 alluminum

 

[DR BOOST]

autolite 104 ...street
autolite 103 track

 

[bison]

I run 103 all the time

 

[murphster]

After melting a plug earlier this year (Autolite 103), I looked around to see if there were any better plugs and what people were using. I'm now using Autolite Racing 103's. They have a larger ground electrode and the ground strap is cut back. Hopefully they might last a little longer if there is a lean condition.

I'm thinking of going to a .028 gap next year as I turn up the boost. I've read where some people have been using .025 under high boost. Other have kept it at .032. Maybe I can get some dyno time in the spring and do some comparisons with different gaps.