hey guys i was just wondering if buying iridium spark plugs for my fd are worth it, i see them for sail on ebay all the time and they say on a turbo charged car, gains of 15 to 20 hp are typical. Does anybody accually have iridium plugs in and do they make a difference, and are they worth the money? also, are there any down side to have these plugs?
Adam

 

15 to 20 HP? Uh I'm a little skeptical of that claim. What modifications do you have on your car? For most people the stock plugs are just fine.

Brian

 

DP, Intake, CB, Unorth. pulleys, racing clutch, the power fc is on the way

 

I ran them in my S2000 and they seemed to make a difference on the but dyno. I'm going to get them for my FD soon.

 

I'm using the ones from HKS (heat range 9). I doubt if there is 15-20hp in there. However, if you are using it with a spark amplifier, the plugs will not last more than 1500km. On my car at least.

 

Bah, I'll stick to NGK's.

 

I doubt that there is ANY measurable HP gain compared to a clean set of standard NGK 9's. Don't waste your money.

Adam

 

dont buy them if you plan on staying in the stock heat ranges. also 30/plug for plugs that will last as long as normal platinums. i dont think so. for some reason rotaries love to eat plugs. do a search for silver bullet. he has something at the bottom of his page where he has done a research on plugs. very informative
kris