any got this answer, between stock plugs and ir power one's? Anything helps

Thx leticia

 

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they will give you 0hp....

 

Agreed.....0HP gain I have them in my Roadster Limited and there is no appreciable HP gain.

 

The only way you'll gain any measurable amount of power by using those plugs is if your stock plugs are giving you incomplete combustion. Since the ecu controls basically everything I'm assuming that is not a problem.

 

You'd gain more HP from a couple of well placed GReddy or AEM stickers.




But don't you DARE put those on a Crossfire, ya hear me!?!?!?!?

 

Ok, read carefully...

Better spark plugs do not increase horsepower. Crappy sparkplugs can cause ignition trouble which can decrease power. Do you think Mercedes would factory equip their cars with spark plugs that caused ignition problems?


The only time a different sparkplug could help is when you have moved the operating environment beyond the OEM plug's operating range (increase compression, swtich to ethanol, add forced induction, etc.).


That said... Denso iridiums are one of the most reliable and durable spark plug designs in the industry. I ran a set of them in my Spirit R/T for over 75,000 miles under high boost on pump gas. They worked like a charm.

 

Off topic alert.

So what year and color was your R/T? How many timing belts did you go through during those 75,000 miles?

 

Sand the block and tensioner where they contact, then flip the tensioner so that the tension of the timing belt tightens the set bolt instead of loosening it over time... I went through more headgaskets than timing belts.