plug inserts

Discussion in 'PSI Superchargers Tech Questions' started by blownmudrail, Jan 31, 2009.

  1. blownmudrail

    blownmudrail New Member

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    have read on here about fixing spark plug threads. it was recommended to fix them with aluminum thread inserts, but mine already had steel inserts. how much would this effect spark plug readings? thanks jeremy
     
    #1
    blownmudrail, Jan 31, 2009
  2. Mike Canter

    Mike Canter Top Dragster
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    It doesn't make any difference on an alcohol motor because you are not reading a fuel ring on the porcelein like with gasoline. Don't worry about it. We have inserts in our motor also.
     
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    Mike Canter, Jan 31, 2009
  3. Ken Sitko

    Ken Sitko Super Comp

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    Mike, my experience is that any holes with steel inserts tend to read lean (all the cad is burned off prematurely), even though they aren't. My guess is that the inserted plug holes read close to 1/2 gallon leaner than normal.
     
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    Ken Sitko, Jan 31, 2009
  4. Mike Canter

    Mike Canter Top Dragster
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    Thats interesting Ken, I have never seen that happen. I have had a mixture of holes with inserts and without and also with all holes with inserts. If it does then at least that is on the safe side.
     
    #4
    Mike Canter, Feb 1, 2009
  5. Sam Jenkins

    Sam Jenkins Member

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    On my engine with aluminum threads and 50% cad burn,put in a steel insert and it goes to 3-4 threads cad burn- watch those veney valve covers!!!
     
    #5
    Sam Jenkins, Feb 1, 2009
  6. pete9857

    pete9857 Member

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    threads

    Same here Ken on our Veney heads. Had holes repaired with billet inserts, now they all look pretty much the same. The plugs were really burned with the steel ones in there.

    Glenn
     
    #6
    pete9857, Feb 2, 2009
  7. Ken Sitko

    Ken Sitko Super Comp

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    Yeah, I actually removed some steel inserts from some Veney heads a couple days ago, and replaced them with aluminum inserts. Should be as good as new.
     
    #7
    Ken Sitko, Feb 2, 2009
  8. TCMN

    TCMN New Member

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    Reading the thread, Where or who is selling the aluminum inserts. Thanks JK
     
    #8
    TCMN, Feb 2, 2009
  9. Mike Canter

    Mike Canter Top Dragster
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    #9
    Mike Canter, Feb 2, 2009

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