Spark Plugs for Saxo VTS Turbo?

  1. Established Member Joined: Jan 2009 Louth/Lincolnshire Posts: 1540 Stage 4.5 Litchfield 725bhp R35 GTR
    #1
    I know the TU5JP4 engine generally used Evo 8 Plugs but what does the TU5J4 engine use?
  2. Saxperience Forum Bum Joined: Jul 2010 South Wales Posts: 3078 ZX 16v, 205 GTI, 309 Goodwood, 405 MI16.
    #2
    depends what your mapper recommends, IIRC an ngk 6 heat range plug is the standard fit, so changing to a 7 or even an 8 grade will help.

    i have a vague memory of the JP4 plug being a different length to the J4 so you need to be very careful there!

    edit: yes the earlier engine has a more standard pug 19mm thread length so you can use a BCR7ES or BCR8ES, both of which are pretty cheap at most motorfactors or off ebay.
  3. Saxperience Forum Bum Joined: Oct 2004 South Posts: 3638
    #3
    BCR8ES

    14mm x 1.25mm x 16mm
  4. Frequent Poster Joined: Nov 2009 Posts: 576
    #4
    What spec is your engine?
    The threads in a J4 are 14 diameter, 1.25 pitch and 19mm long
  5. Saxperience Forum Bum Joined: Oct 2004 South Posts: 3638
    #5
    Quote:
    Originally Posted by Chipwizards View Post
    What spec is your engine?
    The threads in a J4 are 14 diameter, 1.25 pitch and 19mm long
    Chip wizards you miss understand what I said; (but yes they are 19mm long)


    14mm Thread x 1.25mm Pitch x 16mm Hex - Resistor Type - Temp rating 8 - 19mm Thread Reach - Standard Super Copper Core Centre Electrode
  6. Frequent Poster Joined: Nov 2009 Posts: 576
    #6
    It is the LENGTH that separates them from the JP4, which are circa 25mm long.
  7. Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts
    #7
    BCR8ES In my j4 head.
  8. Frequent Poster Joined: Nov 2009 Posts: 576
    #8
    If it's not too boosty then PFR7B might be better suited for road use.