Im going to dig into this upgrade soon and have a question about spark plugs. I use E3 plugs in all my other vehicles and have been MORE than pleased with them. Now, they are $7 ea. but seem to be worth every penny. With the TR upgrade being so phenominal, is it worth going with such expensive plugs? I have seen better response and power in my other vehicles and everyone here says that the TR shows the same kind of results with less expensive plugs. I dont want to do this upgrade and then cheap-out on lesser plugs and be stepping on my own toes. thoughts?
I have had most of the 'Trick' plugs on the dyno, and I can't recommend ANY of them.
The best consistency we got from spark plugs was 'Denso', as in 'Nippon-Denso' and they worked GREAT just gapped and installed.
The longevity wasn't so good, but for a race or two, they worked GREAT.
The ones that did a very close second best on the dyno, and did MUCH BETTER in longevity was Autolite brand.
Just the plain old resistor plugs you get for anywhere from 0.99¢ to $1.50 each.
The WORST plugs we used were those 'Split Fire' things.
More of them were broken out of the box than any other plugs we used in these engines!
We simply had to get 12 to find 8 good ones!
AC/Delco plugs were pretty bad, and VERY FRAGILE.
Pry on the center electrode to gap an AC/Delco plug, and I will GUARANTEE it's broken internally!
NON scientific testing I think the premium Autolite plugs (platinum, iridium or some other such nonsense) seem to work pretty good.
I'm on my second season with them and I can't detect any real problems, but I haven't put them on a "Scope" to see how they are doing...