Increase in performance via spark plugs?

[cool_shaizi]

can any body tell me that can the irridium spark plugs increase the performance (acceleration) of my corolla altis as compared to normal genuine single tip spark plugs ???

[asad1]

unnoticable change in performance

[jz]

if u switch from copper application to oem iridium application yes ull feel a change in the response.if ur already using the oem iridium then no change at all.

[Bilaltq]

JZ- what phone are you using? Download any app which can give you the results of a 1/4 mile run before and after the plugs. I did that with a new intake on my Mazda back when I had it, and it had NO difference compared to stock.

I know some will say that there's not going to be a huge change with JUST an intake, but if you're trying to isolate results to just ONE thing, then spark plugs fall under exactly the same "placebo" effect.

[jz]

actually i did,there was a 0.8hp difference on the android,ill do that again sometime in mid december when im mentally free ,will take screen shots of both.
since im not a professional many people wont believe or wud say results are not true
what im posting below was done by ngk.
check video 7 & 8 in the link as well
http://www.dragtimes.com/video-viewer.php?v=jum9O8ejjUs&feature

these are the results of dyno results which show comparison of copper & iridium plugs.
anyways my side of arguement ends here

JZ- what phone are you using? Download any app which can give you the results of a 1/4 mile run before and after the plugs. I did that with a new intake on my Mazda back when I had it, and it had NO difference compared to stock.

I know some will say that there's not going to be a huge change with JUST an intake, but if you're trying to isolate results to just ONE thing, then spark plugs fall under exactly the same "placebo" effect.