what? Are you talking about just rotaries??? Give me a link to all this HP and life info....

well ok I was wrong the performance increase was not from the Platinum, but from Iridium. just was read this, something like 600 horsepowers increase from iridium? not bad. http://209.132.206.136/content/pht/pht20010101ds.xml

i thought there was just two brands that make plugs for rx-7s

When i went to schucks to get some new spark plugs, they wanted 15 bucks a pop for the 'stock' plugs. They were listed at laser platinum or something like that. I opted for the 5 dollar ones. https://www.nopistons.com/forums/pub...IR#>/smile.png

wow...$15 a piece?!?!?!



bought some platinum plugs recently just because the place didn't have the stock NGK ones...



and they were cheaper in price than the plane old denso's i had before them...$5 a plug :bigthumg:

there are 2 manufacturers for the plugs; ngk and nippondenso, the nippondenso's can be hard to find and expensive



mike

To correct you, Iridium spark plugs did not give the 1100hp engine 750hp.



Iridium spark plugs let the 1900hp engine get close to its mark https://www.nopistons.com/forums/pub...DIR#>/wink.png

And yes, the stock plugs are just fine unless you have a pretty well modded turbo

uhhhhhh......if you are blowing the spark out with a turbo motor....its weak ignition, not ******* plugs....if you are looking for power..look elsewhere.... :rant:

Has anyone ran just the standard Denso plugs (not Iridium)? I'm curious about how they held up after 15K or more compared to NGK R's.