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Thread: J Gapping

  1. #1
    Chrisrokc's Avatar
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    J Gapping

    I have been doing some searching on the subject of J-Gapping. I see Fercho has done this and awhile back talked about it on and showed pictures on riva forum.

    I never saw any results posted on this. Does it make a difference in rpm or speed? I am looking for all the free or cheap rpm I can get and so far this and indexing are at the top of my list to try out.


    So anyone try this? Results?


  2. #2
    I never did any back to back testing myself but I've heard 20 rpms a few times.

  3. #3
    Chrisrokc's Avatar
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    Quote Originally Posted by porksword View Post
    I never did any back to back testing myself but I've heard 20 rpms a few times.
    Hmmm, I wonder who else is doing this....

  4. #4
    I am running J gapped and indexed plugs, i just never did any testing to see how much it helped. I figured it couldnt hurt since most of the motorsports world does it and its cheap and easy to do.

  5. #5
    txgp1300r's Avatar
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    I run j or side gapped plugs......20 rpm increase verified w/p.e.t. tach

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