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Pretty common practice in the race world if you do a google search. All the autolite racing plugs have a cutback ground strap and are "side gapped". This basically just gives you a shorter ground strap so it will act like less of a glow plug in extreme heat.
Side gapped recessed plug VS a standard protruding plug (and no those aren't my mangled fingers )
Autolite AR474 "racing plugs" are what I would run for most 20+psi LS motors. If I didn't need a resisted plug I'd be running them. Best performance plug for the money IMO. They are an "8" heat range on the NGK scale. Also have a "special" electrode material. My local parts stores could order these cheaper than summit/jegs.
How do you determine the gap on these? They sound good, and I would be willing to try them, so long as they are good plugs and I can figure out the gap.
How do you determine the gap on these? They sound good, and I would be willing to try them, so long as they are good plugs and I can figure out the gap.
Same as any plug. It's the distance from the electrode to the ground strap.
i have a ls3 race car on e85 turbo running low boost maybe 11-12lbs max goal is 600-700whp..
my tuner told me to get colder plugs but after reading this thread I'm confused even more..
I'm looking for a great LS plug in the 8-9 heat range from what I've read but I'm confused on
resistor vs non resistor and why..
cutback vs non cutback what does it do?
thanks guys I'm trying to get these plugs bought today
I'm trying to figure out what plugs to use on my build which is a 427TT that will be on pump 93 probably tune it to around 1000whp at hopefully 15psi +/- I would guess 7 or 8 range no projected plug?
11-05-2014, 06:42 PM
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