Originally Posted by
ABN Hoosier
my friend, (Novarossi sponsored driver) told me that they burn a tad hotter than the Nova C6TGC plug. He adds that this is why the plug life is somewhat shorter for the 97T plug. But he also said it is easier to tune with the plug....
+1
You'll also get a better acceleration with the hotter plug. On high speed tracks and/or warm conditions the colder Nova plugs are better. I personal like a little hotter plugs due to less risk of flame-out e.g. after pit stops.