Spark plugs?

[h8z2luze]

I know you all like ngk but What about bosh platnum 4's???

[skunk]

I was reading A great article about how In any forced induction or No2 charged cars, certin spark plugs will actually heat up so much it can work like a gloe plug, igniting the gas at detrimental times. It's all about the ground coming out of the top of the plug if it's to long it will make excessive heat(no pun intended) I personally have run the platnum 4's and cant tell the diff. But all I know is, if their are 700+ whp supras running ngk's, works for me.

[suprasforlife]

I've used them both and personally I like the +4's. Acceleration and deceleration feel smoother in my car with them. This is in my mk2 with the 5m-ge. I replaced the cap, rotor, and wires to which makes everything better.
Have not done it yet in my mk3 as I just got it a few days ago. Happy B-Day to me.

[h8z2luze]

Thanks for the resopnses. I had the 4's in a eclipse and they seemed to do ok. I heard they burn valves though cause they run to hot or something.

[theWeezL]

While the claims of the +4 look great on paper in theory they do little to help performance. A spark will take the path of least resistance, so that will be the electrode that is closest to the core. As they wear this gap changes and a new electrod emerges as the shortest path. The problem is the core is still wearing away all this time as well. The +4's are great if you want a super long lasting maintenance free plug. BUT, if your looking for performance the thing to look for is the strongest spark. The key here is resistance. The lower the resistance, the better the spark will be. To be honest there is nothing new on the market that performs significantly better than a copper core plug. The problem is in longevity. Basically its a trade off...lifespan vs resistance

I am currently trying the new irridium NGK's and I felt improvement over the bosche Platinums that came out (not a fair comparison though as my platinums were toast)

[h8z2luze]

How much were the NGK's? I might go with those.

[theWeezL]

I believe I paid 8.15 each...not exactly the cheapest plugs on the planet

[mrnickleye]

Besides that, I had problems with bosch breaking down. In fact, I was talking to some other lifelong mechanics (at a different shop) today about misfires in engines. We all seemed to have our stories about bosch plugs being a problem.

I started using Autolite plugs about 20 years ago, and have never had a plug problem. These other guys said about the same thing. We also all agreed that NGK and Nippon-Denso plugs were trouble free.

(But when I read the "HYPE" of bosch plugs, I almost get sucked in.)

[Isphius]

My bosch plat +4 plugs failed after about 1000 miles. My motor started missing when i gave it more than 1/4 throttle untill it was running warm. Then it still totally didnt go away. And it got worse and worse every day. I was at the point of ordering new fuel injectors, But id figured id rule the plugs out. I got cheap 2$ pulgs from pep boys and it ran fine. Theve been good for bout 3k miles now. So i not to fond of the +4s. But ive had them in my monte carlo for 3 years and it still runs beautiful. So who knows? i would def trust the NGKs tho. Why would a plug make the gasoline burn hotter? Unless other plugs dont burn the gas all the way...I figure the plug cant change the combustion reaction too much, It just ignites the gas. Im just asking someone to clarify this if they know why.

[h8z2luze]

is there a huge diffrent in the iridiums and the regular ngk's?