Shiv:
I installed the Vishnu Stage one Signature on my Evo, and I also bought the NGK Cold Spark Plugs. I feel that the car burning rich and does not have a steady iddle. Besides that the car is running great . What do you recomend the Cold Spark Plugs or the orininal spark plugs?

Thanks,
Chico

 

The orginal spark plugs are good but they are over kill, they are 50 to 60 dollars high spark, like denzo iridum plugs but for are cars it's doing nothing, all the evo needs is a set of regular NGK plugs!

 

Idle quality sounds more like a gap issue to me. Did you check the gaps on the spark plugs before installing?

 

The gap is set to 25mm, which is what Vishnu recomends.

 

Hey chico- what heat range did vishnu sell you? Could you post the letter & number of the spark plugs?

 

I just bought NGK Iridium plugs from gruppe-s for like $30 shipped. I got one step colder. These plugs come pre-gapped correct?

 

The spark plugs that Vishnu send me are NGK BR8ES, completely diferent from the Iridiums.
I`m switching to the Iridiums.

 

If your not running leaner then stock and higher boost, you will detroy colder plugs ever oil change.

 

lol that what i use on my dirtbike..i get them at advance auto for like 1$ something a peice..heh

 

B.S., I am stock except for K&N drop in & I have put over 3500 miles on my BR9ES plugs. No problems yet. However, I have my idle set to ~950 / 1000 rpm.