Thread: What spark plugs do you use?

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Indexed split fire, been using then since they came out with good results, back em with a 6AL.

Originally Posted by DennyW

We run the plugs that cost $1.89 and can't tell any difference in the dyno room or on the track over all the other hi dollar plugs.
That 1.89 spark plug comes up as Saab NGK 2.0 liter.

I don't believe the 8 out of 10 guy thing either.

At the track here, that number refers to Autolites.

O.K,maybe it was only 7 out of 10 guys run the NGK plugs.
I will say some of the plugs that use the "trick" materials may last longer but I doubt they make any more power.
The hi-dollar plugs will actually make your ignition system work that much harder when you try to lite it all off.
Keep in mind electricity always tries to follow the path with the least resistance which might mean with a cheap or stock ignition system you might loose hp in the higher rpm area do to the ignition system having to work that much harder.
The Split-Fire plug is nothing but a clever marketing scheme.
I showed one of these to my Dad when the first came out and he dug around in the top of the old tool box and found a plug from the early 60's that looked much like the Split Fire's.
Denny we really need to work on your sense of humor I think it might be starting to slip again.

NGK's must be firing better on the high voltage quality ignition systems, they are a lot easier to read. Don't know about the dyno results, never have done run to run comparisons I guess... I do know that on the circle burners we have run, the NGK's sure do fire nice and last quite well too... As for the drag cars, hate to admit it but my beloved Autolites have not held up as well in the high compression E-90 fueled engines as well as the NGK's. Can't even remember the last time I bought any Chamions for anything...... Never did have a bit of luck with them. Not being a chebbie guy, been just as long since I bought a set of AC's.... In the cheaper (if you want to call it that!) circle burner classes the boys seem to lean towards the Autolites, but most all the hard chargers (aka winning cars) in sprints, late models, IMCA and Wissota mods all seem to be running the NGK's. Made a walk down the ASCS sprinter line in the pits, not a car there running anything other then an NGK, just a few different numbers. Must work good with their spec engine setup for some reason, seems the Brodix heads always run best with the NGK plugs.....

I guess next I'll find out there is no Santa

I guess next I'll find out there is no Santa

I know for a fact there is a Santa, if it wasn't for Santa I would not have half the parts for my car.

Originally Posted by Dave Severson

NGK's must be firing better on the high voltage quality ignition systems, they are a lot easier to read. Don't know about the dyno results, never have done run to run comparisons I guess... I do know that on the circle burners we have run, the NGK's sure do fire nice and last quite well too... As for the drag cars, hate to admit it but my beloved Autolites have not held up as well in the high compression E-90 fueled engines as well as the NGK's. Can't even remember the last time I bought any Chamions for anything...... Never did have a bit of luck with them. Not being a chebbie guy, been just as long since I bought a set of AC's.... In the cheaper (if you want to call it that!) circle burner classes the boys seem to lean towards the Autolites, but most all the hard chargers (aka winning cars) in sprints, late models, IMCA and Wissota mods all seem to be running the NGK's. Made a walk down the ASCS sprinter line in the pits, not a car there running anything other then an NGK, just a few different numbers. Must work good with their spec engine setup for some reason, seems the Brodix heads always run best with the NGK plugs.....

I tried to tell them.

Originally Posted by DennyW

You want power on the top end, you run good old straight through wire wires. And, non resister plugs. It's like driving a Cadillac, or or wanting to go fast, you leave the Caddy parked, and take the Nova instead.
System working harder ? You mean faster don't you ? That's why with high rpm's, you buy the beefy high output coils.
The split fires, do give more power. This I know from my own testing. Yes, it is a marketing scheme. So is everything else. Except, a lot of them don't work. My self, I like the 5-6 neg electrode style. There are a few things you can do to plugs to help out. Not just the name.
What's wrong with my sense of Humor? I thought I was doing quit well.

And, don't forget, you can always run the Super Sonic Plugs !!

Denny,if you don't have a chassis dyno or an engine dyno how do you know the Split fires are making more power?
You are not going to tell me you can feel it in the seat of your pants now are you?

Originally Posted by DennyW

Raced the same guy, same day, twice with another brand, and the third and forth with split fires. The first races (quarter mile mark off here), I lost. You could hear the miss fires at 6 grand, I switched plugs, and beat him the other 2 races. Yes, both sets were new plugs. Yes, I could feel the difference. Response was more solid. No, I don't have any fancy stuff anymore for testing. Only the street.

This was a well known, marked off back road, with guys at both ends to regulate traffic.

Besides, does that dyno have a set climate ? Sunny day dry, cloudy day, wet ?

Well yes,we can control the temp and the humidity .
If you say you can feel the difference the I will have to take your word for it.
I have only done this for 20+ years you have done this for more than 30 years and I could never tell any difference by the seat of the pants by trying different plugs un-less we had the totally wrong ones in there.
I.M.O.,this is something only a dyno could tell.
For all you new guys to engine building there is no such thing as a "magic spark-plug".
The gains are a very small amount and the guy on the street does not need to go out there and spend $7.00 a piece on spark -plugs.

I also use NGK's. Just standard resistor plugs. No fancy platinum for me, I don't think it would make a difference in an old chevy anyways.

standard autolites must not be to bad sereing as a guy here runs high 8's with the bottle low 9's without and has no problem and at least here its 8out of 10 use autolites probably 9 out of 10 guys.

wasnt their a thread on indexing plugs?