Heat range???

[sosolid]

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.

[Idrees]

7

[sosolid]

thanks idrees. any other inputs would be appreciated.

Edited May 10, 2015 by sosolid

[DevonGT]

Use copper plugs.

[sosolid]

aint iridiums the best?

[Stu]

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.

[AdamB]

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

[sosolid]

thanks for your input guys but what heat range spark plugs are you guys running?

[DevonGT]

I'm running 7's.