what will plugs set me back, and whats the labor charge for something like that?

 

You do not necessarilly have to change the plugs, I ran the stock motorcrafts for about 1000 miles before changing to the denso's, and the truck ran fine. However, the stock plugs tend to miss at higher rpms with the increase in boost. Talk to your tuner, and they will steer you in the right direction.

 

Ran IT20's with a 4# in the summer, had some detonation when the A/C was blasting and under light throttle tip in. The chip program was too aggressive but that is a different issue altogether and not relevant to your question.

Replaced them after 10K miles with IT22's, no problems whatsoever.

Go with a colder plug and be safe.

Bob

 

TR6's here with a 3# lower and a 75hp shot!

 

TR-6's at .038 gap with great results!

 

The plugs are about 2 bucks each for the TR6's

About a hour to change them

 

BR7's and a 4#. You may encounter a miss at idle, but it is a colder plug and much stronger then Densos.

 

Go for the money and get the Denso IT-22's, here's why.
many people as you see are happy with TR-6's, but just as many are not. They are of course the plug of choice and that’s partially because they are 18.00 compared to 80.00 for Denso's.
My personal experience was a bad idle from them. As for the heat range, why I like denso's are because you can run the colder 22's and be safe and give yourself a little room for error in a tune, yet because of their design, you are pretty much guaranteed a great idle and no misses. Another words they're more forgiven if you know what I mean. The main thing is THEY DO take more heat out of the cylinder than a TR-6 will and heat is bad for a Lightning.

 

Denso 22's here............

PEaCE..................

 

tr6s here and there great (just keep a eye on any plug you put in they will come loose)

 

I run the Denso's IT20 No problems, smooth idle,

See above chart

 

Denso IT-22's here too

 

How much does it cost for the densos?

 

I switched to BR7's on Sal's advice after
roasting some TR6's ...

The average first time plug change prolly
will take about 4 hours ... <grin> But you get
better with experience

DENSO= big $ = $ 80 - 90 dollar

 

TR5's with a 5# pulley. The TR6 gave me a slower MPH. The TR5IX Iridium burns more like the TR6 and has the same MPH as the TR6.

Jimmy (DealerJim, NRG2ENV) and Cory (CodeRed) run TR5's with a 4# pulley.

We are running JDM programs setup for TR5's. Get with your chip tuner for the plug that's best for your tune. One size does not fit all.