Just got a 4# pulley and cutom tuned Diablo chip for my 2001 lightning. Is it an absolute must that i change out my stock spark plugs for denso it22's or comparable?

 

I dont think you need to spend 90.00 on plugs when 20.00 for TR6's do just fine. There probably be some debate on it. Sal recomends Denso's but the guys at REM think the TR6's are fine. I have the TR6' which I've been running for about 500 miles with my 4#er. I am going to pull a couple this weekend to see how they look.

 

Thanks Rhino, much appreciated. I guess what im really getting at though is that if i need to change them out at all or can i run safely with the stock platinum plugs?

 

JL also recommends the IT22's as his choice of plug.

 

The Platinum plugs are usually changed because the center electrode likes to get too hot and cause the ceramic material to crack off. You don't usually burn up the ground electrode like this plug but you get the idea.

https://www.f150online.com/forums/sh...threadid=92949

 

I have been advised that the TR-6's are still too
hot for the 4# pulley's boost. The BR7ef's are
the chitz ... Just put them in last Monday and
the beast perked right up. Some say you might
get a rough idle with poor gas on the BR7's but
I haven't seen that yet. Very happy with the
plugs compared to the $100.00 Denso option.

Cliff

 

It is my understanding that the stock platinum pluds are no good for a supercharged application. Why Fords uses them, I can only wonder, except its the plug that they use in the N/A 5.4

There is plenty debate on Denso's vs. TR6's
I haven't a clue, but two Tuners recommend them and that, my friend, is good enough for me!