Currently, I have just a Superchip, two pund pulley, and a drop in K+N filter - I plan to add an open filter soon. My question is what plug should I run with these modifications - NGK Tr6's, Splitfires? I have seen a few posts where the Splitfires seem to help the most, but I wanted everyones opinion before I make a move.

Thank's for your help.

 

I would go with the NGK and stay away from the Splitfires.

I have had great luck with the NGK's.

 

I would use a NGK TR5 gapped @ .044

 

Check out this misfire chart someone provided for us a while back. Some good info.....
http://www.supercrewdriver.com/galle...0138&anum=1351

 

What's the difference between the TR6's and the TR5's? Which would better suit me?

 

Hey Phil, I have the NGK TR-5's in mine and they area fine.
Just pulled number 1 and 5 and looked them over real good and
everything looks great. The 6's are colder.
Where you been? I haven't seen you at 42 yet this year.

Marc

 

The TR6s are colder, and more likely to foul out if you aren't putting a lot of boost to them. The TR5s are best for your application... or Densos, better by all testing, plus the IT20s would work well for you. I went with the IT22s (higher numbers equal colder plug, colder plug equals less chance of detonation under higher boost/compression) for my 5# pulley. So far they are working out very nicely.

 

Thanks Marc. I have been to 42 twice this year. It seems that when the weather is nice, I always have something else going on. I went last Friday night, but it was very warm. My best run was a 13.50 @ 102. The weather cooled off later that night, but still could not run any better. I am not sure what is going on, but I figured maybe new plugs and fuel filter would help some.
Anytime you want to head out to the track, shoot me an e-mail:
gene6136@hotmail.com

 

Thanks Phil. Will do.
I will probably hit there one night next week. Probably Weds.
Marc

 

Sounds good to me.

Is this the number that I ask for at the auto parts store:
a TR55-1-X ???

They don't list a plain NGK TR5.

 

Where can I order these plugs??? How do you all get them? The parts store wants me to come in person, and order them - a week to two week delievery time

Here is what one on-line parts store lists:
NGK TR5 Spark Plugs, Stock heat range, gapped at .035 $1.95


NGK TR55 Spark Plugs, Stock heat range, gapped at .050 $1.95


NGK TR55-IX Iridium Spark Plugs, Stock heat range, gapped at .050

Notice how the NGK TR55IX is Iridium?? which is best?????

 

Call your favorite tuner up... they oughta have what you need in stock...