Plugs for Turbo 5.0 Fox ??

[svtmofo]

Just curious what plug i should go with here, Ill be running a single turbo on a semi stock 91 5.0, Stock heads. Also what gap should I run? Wanting around 450 rwhp ish, if that matters for the gap and or heat range. Thanks in advance

[Racin Jason]

do u have an ignition box? autolite ar 3923... gap would be around .35

[svtmofo]

I dont have an ignition box yet. but prolly will before it starts up. I work at autozone, and I have heard nothing but negatives from customers about Autolite. I myself have used them and have had a car miss, then but ngk's in and ran fine. Anything else you would recomend? Should I run a cooper plug, or a platnum, 1 or 2 stage colder?

[Jeff88coupe]

for stock heads i would run 1 step colder....autolight 24's or the equivalent NKG. If you put a ignition box on..then 2 steps colder...23's. Plain autolight coppers work great..ran them for years. Stick with a plain copper plug...no platnum stuff with poweradders.

[svtmofo]

Cool appreciate it man! would the gap be the same on all, at .035 like stated above, even with going 1 or 2 steps colder?

[Jeff88coupe]

.030-.035" gap should work ok. If it seems to stumble or cutout up in the rpm's...try tighting up the gap some.

[svtmofo]

Cool thanks alot. I found I can go with the ur6. Thats a 2 step colder plug for the ngk's Thanks everyone for the help

[Galaxie]

I had big issues on my Fairmont gas fouling the NGK's and after doing research on the turbo forums I switched to Autolite and running a step colder plug and havent had a problem since . I have them gapped at 35 .