COLD????? FOR A SMALL BLOCK? NEVER!1!!!!!11!1!111!!

you use cold in big block engines...

for the t-15 id recommend the O.S a5 or the O.S standard #8 long med-hot

if u run a cold plug in the t-15 u will not get very nice performance

belive me i tried it

when i first started nitro r/c i thought that a colder plug kept the engine colder..WRONG!

for example.. if you ask 46u soon..ill bet he runs a either med-hot to a hot glow plug in his tz

for a .12..what do you think you would use based on the psage abov. use example and details from the passage! LOL(FCAT questions)