Originally Posted By davenc
Originally Posted By fourgearsavoy
I am currently running Denso iridium plugs for a Toyota Tundra in my 10.9 compression 493 with Indy EZ heads and they run perfect all year long.
I have considered using the twin ground plugs but it runs so well with the iridium plugs why change shruggy

Gus beer


What type of plug did you run prior to the iridiums? Did you notice anything on the change?


Ran the iridium plugs since the first fire and never tried anything else shruggy I've been a tech for close to 35 years and I know how to read my plugs and they have a nice perfect burn on them and I have not heard any detonation even on 90* days with pump 93.
Gus beer

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60