88MustangGX

whats best for our cars? NGK, autolite, bosch, accel? I want NGK iridium plugs but maybe they won't work well with the 5.0's. thanks guys!

cepowers18

I have Autolites, but I don't think it matters all THAT much... that is, unless you're running a serious setup which calls for a better plug.

Hung Like a Stang

It really doesn't that much. I have NGK's, I like the way they seat.

1993 5.0

I'm running autolite, no problems with them.

liketoskate1

i run E3's and i love'm

83gtragtop

I have Bosch Plat. +4's and the car def. ran better when i put them in and the old plugs were in nice shape. Now I hear that after a couple thousand miles the Bosch Plat. start to suck, has anyone else heard this?

Pete1113

I've used Bosch and Autolites for years and never had a problem. I buy the standard platinums and found them to be great. Actually there was an article in Consumer Reports a while back on the Bosch +4 plugs and they found them to be a marketing gimmick. Worked fine, but no improvement over the std plats.


Anyways I change mine every 20-25 k just because I'm fussy. Heck they're only $2.50 each.

Goosepoop302

whats considered a "colder" plug liek for nitrous

mrbigshot

on american plugs going one number down is colder, from a r44lt to a r43lt would be one step cooler. on jap plugs (ngk) going up 1 number is colder, ie a br8es to a br9es is 1 step cooler.

a cooler plugs has less heat when it fires, the insulator is not as effectiove as a hotter plug allowing some heat from the tip of the plug to be extracted. this is important on a nitrous engine because if the plug was hot the tip would be hat even when the plug is not firing (acting like a glow plug), this could ignite your nitrous/ fuel mixture early and the increased cylinder pressure can easly bend a rod or shatter a piston. it is also improtant as the cylinder temps will be higher and can melt the ground strap of the plug off from the heat.

95gtpa

I have autolites. They work fine.