Something to chew on...

3.8 SC Thunderbirds came with platinum plugs from the factory. And the modded guys swear by them that i've run into on another forum.

Different compression ratio. They run 8.2:1.

I read in a previous post that these copper plugs can be changed once a year.

Considering that the plugs don't foul up and such, is this a good time period to change the plugs?

I think once a year is more than reasonable. On a modded car, your plugs won't last as long. It'* hard to find the perfect balance. They're easy enough and cheap enough. I do it at LEAST once a year, sometimes more often, but that'* for other reasons. A failed plug wire will foul a plug. I simply replace the whole set when this happens.

Since this seems to be the spark plug thread, I hope people don't mind if I ask a few questions. (1996 SE, 88,xxx miles : I drive hard and my mom makes a lot of short trips)To my knowledge the spark plugs have never been changed. I know the wires are stock. I plan on replacing the plugs ASAP. I would like to do wires also.

Onto my questions/requests:
1 Can you guys give some tips for removing spark plugs. They have been in the block gor the last 8/9 years, so it'* not like they are just going to fall out.

2 For a stock car(other than K&N replacement filter and future exhaust) should I stay in the stock heat range?

3 What should I do before I put the new plugs (and wires) back in/on??
a. anti seize on the threads
b. and...?

4 any other tips/tricks that may be helpful (for spark plug changing in general?)

I'm sure someone else can explain certian tips and such better so i'm not gona try. But you should try autolite 605'* from www.intense.com. I've read nothing but good reviews about them by other L36 owners. But if your a fan of NGKs then get the TR55'* from www.zzperformance.com, they could be just as good but i haven't read anything about them in a L36 car.

Why buy plugs from an online vendor when both of those plugs are available at most retail outlets? TR55'* are available at NAPA, as are TR6'*.

Hey Wellwren, Have you lowered you gap now that you are injecting H20/Alk?

Not until the new trans and warmer weather

i got my autolites for $1 a plug so the ngks arent that much more expensive...
and for the ford supercoupe not only is it a different compression ratio, but they are also intercooled