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  1. #1
    Do Work Son 05RXPnoob's Avatar
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    Spark Plugs-> Indexing

    Does our 4tec engines prefer the plugs indexed towards the intake or exhaust?

    Also would our forced-induction engines benifit from side(j) gapping?

    Jay


  2. #2
    sourpower RXT's Avatar
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    I use to index my plugs on my 2 stroke Kawi's......not sure what the gain was but some boasted 50rpms?? Not sure if it helps for RXP/RXT

    That girl in your sig kinda looks like Briana Banks....she prefers some else than a finger though

  3. #3

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    I use to index the plugs on my 87 GN. On a mild 400hp setup the indexing netted 8 hp to the wheels. Motors are completely different, but since our powerplants produce 215 stock this may be something to look at.

    We use to index the plugs toward the exhaust side.

  4. #4
    Do Work Son 05RXPnoob's Avatar
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    Quote Originally Posted by D Lo View Post
    I use to index the plugs on my 87 GN. On a mild 400hp setup the indexing netted 8 hp to the wheels. Motors are completely different, but since our powerplants produce 215 stock this may be something to look at.

    We use to index the plugs toward the exhaust side.
    Ya, I used to always index towards the intake on import cars, but my dad was telling me that he always indexed toward the exhaust in his drag cars. . . so I've been doing a little research but still cant figure out which is better for the 4tec's


    Quote Originally Posted by sourpower RXT
    That girl in your sig kinda looks like Briana Banks
    Jessica Burciaga

    Jay

  5. #5
    HOSS's Avatar
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    Talking

    Now in the new millenium indexing is becoming less popular. In the 80`s it was 50/50 from engine builders on good/waste. I have indexed plugs at the track and netted nothing, zero.00. I`ll tell ya as well as MOST engine builders (on a pro level) that indexing is a waste of time. I will never waste anothe rsecond of my life doing it.

  6. #6
    GTXX's Avatar
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    index so the gap is toward the intake side. look at the pic of this head and you can see why.
    http://www.greenhulk.net/forums/showthread.php?t=20229

  7. #7
    I`m on the fence on this one , based on the shape of the combustion chamber, unshrouding the flame kernel from the ground electrode may or may not have any gains...
    I didn`t feel the need to index plugs on my past turbo cars and big block power plants...
    like HOSS, my friend went thru the process of indexing plugs on a chevy small block, netted zero results...
    this topic could get pretty technical, but IMHO I think that using the ND iridium plugs will suffice, less voltage required for spark, stronger consistent flame kernel, etc etc...PR...

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