why are bosch plat+4 bad plugs? arent cold plugs good?

[SLOWBRAEATER]

I thought it was good to run plugs that run colder? would bosch +4 make a car slower in et? what are good plugs and why is copper better for faster 1/4 times?

[Dominic]

I thought it was good to run plugs that run colder?
Only if you need colder. If the plugs are too cold they will foul. Read the NGK FAQ

Would bosch +4 make a car slower in et?
It shouldn't if they don't misfire. If a plug fires and fires on time everytime, thats all you can ask for from it.

What are good plugs and why is copper better for faster 1/4 times?
Copper conducts better and has less misfires at high RPM. They wear quicker also. Usually copper is only needed on nitrous cars, since Pt + NOx = BAD. Some of the best plugs today for n/a cars are the iridiums, and I don't think they harm nitrous cars either but don't quote me on that as I'm not a nitrous GURU. :cool:

[Loochy88]

i have never had a problem with my platinum plugs. You guys have scared me away from them for next time though. They sure didnt make the car feel slower. I wonder if they did slow it down though...

[SLOWBRAEATER]

I think its just more or less personnal preference, i dont see any facts here or anywhere stating bosch plat+4 are bad or slow our cars down.

[navyblue2000]

in my experience, +4's slowed me down.
Platinum burns hotter than copper, and there's 4 electrodes. Even though there's only 1 electrode getting a spark, it heats them all up around, which can lead to detonation, as heat can get out of the combustion chamber. I switched back to regular plats, or even then, bosch supercraps (copper)...ran faster, better MPG's, less misfires in the higher rpms.