quantum555

what spark plugs can be used in a 91 5.0 mustang. only mods are 9mm wires, blaster coil. i have heard you are supposed to use a certain temperature plug... is there a certain gap or brand that works the best??? any help would be appreciated

j

Duffs302

I haven't heard that, but I use Motorcraft plug.

stangcrazy

I just use Bosch Platinum+4 plugs no need for changing gaps.

http://www.boschusa.com/AutoParts/Sp...PlatinumPlus4/

luckythirteen13

i use platnum autolites. i used the bosche plugs (platnum 4's) in another car and found them to be worthless. they fell apart on me really quickly.

bobby

the only plug that really burns hot enough for fords is motorcraft and autolite. the platinum 4s are NO better then the regular platinum, there a joke! just run motorcraft or autolite, u cant get a better plug for our cars! or some denso iridiums if u wanna pay $70 for a set of plugs.

quantum555

thanks guys!!!

vfast

autolite 24 I believe in a stock engine

roundman

use the motorcraft or autolite stock spec'd plug gapped at .052" and you should be fine!
BTW, all plugs have a heat range rating that has to do with the length of the ceramic insulator portion of the plug that sticks down into the cylinder. the longer this insulator, the hotter the plug rating and the shorter it is, the colder the rating. as engines are modified from stock, you may have to change the heat range rating of the plug to keep them burning clean, i.e. switch to a hotter plug OR to keep them from burning up, i.e. switch to a colder plug.

EmptyEvergreen

denso iridiums here...i dont mind spending over one hundred on a set of plugs

roundman

Hey vfast, check this out! And you accuse me of being rich? hahahaha