sosolid Posted May 10, 2015 Share Posted May 10, 2015 So i have finished doing my car up with a brand new ct9 hybrid and full supporting mods but want to know what is the right heat range spark plugs ? They are currently 6 iridiums and are in superb condition. Quote Link to post Share on other sites
sosolid Posted May 10, 2015 Author Share Posted May 10, 2015 (edited) thanks idrees. any other inputs would be appreciated. Edited May 10, 2015 by sosolid Quote Link to post Share on other sites
DevonGT Posted May 10, 2015 Share Posted May 10, 2015 Use copper plugs. Quote Link to post Share on other sites
sosolid Posted May 10, 2015 Author Share Posted May 10, 2015 aint iridiums the best? Quote Link to post Share on other sites
Stu Posted May 10, 2015 Share Posted May 10, 2015 Iridium's are not very forgiving if your fueling is not spot on. They are good for a standard car. 9 times out of 10 I setup cars with standard BKR7E plugs gapped to suit the boost the car is running (0.65 - 0.8mm). Have got a couple of customers running 20+psi on these with no issues what so ever and they're cheap too. If the burn is too hot you can go to 8's but its usually only a pretty serious setup that I would use them for. Quote Link to post Share on other sites
AdamB Posted May 10, 2015 Share Posted May 10, 2015 (edited) There's no such thing as "The best", what suits one may not suit another. Heat range 6 will be fine, although can change to 7 if you want. Some iridiums have been known to drop the electrodes, coppers are fine just replace them more often. Edited May 10, 2015 by AdamB Quote Link to post Share on other sites
sosolid Posted May 11, 2015 Author Share Posted May 11, 2015 thanks for your input guys but what heat range spark plugs are you guys running? Quote Link to post Share on other sites
DevonGT Posted May 11, 2015 Share Posted May 11, 2015 I'm running 7's. Quote Link to post Share on other sites
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