Results 1 to 3 of 3

Thread: 350sbc spark plugs

  1. #1
    Guest
    Join Date
    Dec 2017
    Posts
    54

    350sbc spark plugs

    Anyone using iridium spark plugs, are they worth the cost

  2. #2
    I have a big problem with aftermarket parts that make huge wild claims - especially when you read about exotic materials like Platinum and iridium. However, durability under high pressure stress (if drag racing and/or nitrous inject etc) over long periods may change choice. I run a standard copper set of Autolite in my 351C for £24 for a set of 8x ... with the Cleveland normally aspirated, below 4000 miles a year at normal street speeds, they'll probably outlast me.

  3. #3
    Moderator jsf55's Avatar
    Join Date
    Sep 2003
    Posts
    14,969
    Images
    59
    I read up a bit about them and as suggested, for our low use engines and shorter service intervals because of winter lay ups, that iridium plugs are expensive and may actually cost you horsepower !

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •