Thread: What spark plugs do you use?

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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.