formula_novice

iTrader: (1)

I have been using AC Delco's for a few years now, but am currently thinking about going to Bosch +4 plugs. I hear they are "suppose" to be better, but is there really that much difference between plugs?

Any opinions/suggestions would be appreciated.
Thank you!

Fire"Dutch"Bird

iTrader: (1)

Stay with Delco, maybe try the Delco Rapidfires

iroc-si

Lock at the top right of this page and click search. This is so old as a subject!

Si.

ps. ac delco or ngk are what you want!

TransAmman87

I asked this question awhile back. I got the Platinum 4's 3 weeks ago, installed them, and my car wouldn't run right. I had a mechanic take them out and they looked like they were already wore out. Look at the posting "Bosch Lied". I started this thread and you'll see why.

formula_novice

iTrader: (1)

Thanks for the input everyone.

TransAmman87, sorry to hear about all the trouble you had... I'm not going to risk puttin the +4's in my car now!

I did read about some people putting regular AC Delco plugs in their car and others putting RapidFires in their cars. Is there a noticeable gain by going with the RapidFires over the regular AC Delco plugs?

TA5LiterHO

I could not tell a difference between the regular AC Delcos and the Rapid Fires. The rapid fires cost more. I did notice a difference with the Accel U Groove Header Plugs I used last time though.

Goumba T

I'm using Champion Copper Plus. No problems.

Fire"Dutch"Bird

iTrader: (1)

The heatrange of the Rapidfire is wider than regular Delco's, therefore they withstand fouling better, but you only notice the difference when a (regular) plug foules!(no powergains or so!!).

iroc22

Change your plugs every 10,000. You'll get the most performance gains.

5.0Camaro

NGK makes some good stuff, thats what the 4th gens seem to be using and over on the ls1tech.com board and those guys over there seem to really know there stuff.

Buddy

NGK Iridium plugs went in late last year, haven't driven it since, so can't make any pro/con comments yet. Expensive though.

iroc22

There's something to remember when buying spark plugs: the harder the metal the less conductive the spark energy transfer is. So you get a slower, smaller spark with the harder metals. Iridium is the hardest, followed by Platinum and last is copper. The harder metals outlast the softer ones, but you lose performance.

Something to keep in mind anyway.

age

iroc22: but what about their claims that with a smaller center electrode, less voltage is required to jump the gap. Wouldn't that therefore "even" things out when compared to the material being less conductive than copper? I checked out the NGK website a while back, and was also reading about how they had redesigned the Iridium spark plugs itself to prevent fouling. What are your thoughts on those?

iroc22, I'm asking these questions out of a serious, learning inquiry. I'm not a believer or "gimmick" plugs, but I can't help but wonder that as time grows on us, so would technology.

camarojoe

Plugs are plugs, it's plain and simple. As long as you get the end gap and heat range right according to your engines compression ratio, none of those fancy platinum or iridium plugs will give you any extra hp, they'll just last longer. I know because of a friend who's been on the dyno with his race car over a 1000 times, has found this out to be true.

iroc22

Well thats a viable argument, but I would tend to think that according to V=IR, that if you lowered the voltage, the amount of amperage flowing through is less. The ohms usually remain constant within sparking processes and the resistor size physically is usually the same as well. I'll still stick with my theory that copper can conduct better and will produce better power when optimized (not worn out).