spark plugs for 100 shot tight headers

Discussion in 'High Performance Modifications' started by Mwilson, Mar 7, 2018.

  1. Mwilson

    Mwilson Veteran Member

    Whats the best option for a tapered seat plug & tight head
    to header clearance that will run well on a 100 shot?
     
  2. Mwilson

    Mwilson Veteran Member

    looking at Accel 8199 #0576S
     
  3. mrdragster1970

    mrdragster1970 Veteran Member Lifetime Gold Member

    .


    No clue on body size, I don't have that issue on any of my cars.

    I use br7es on nuts
    br9es on 300 shot
    br10es on 500 & above.

    For only a 100 shot, I would only go 1 step colder than nuts.
    Just to be safe, but with good fuel, many guys don't change plugs for only 100.

    I know they talked about a small body plug on the bullet before, but I don't recall the details.

    .
     
  4. Mwilson

    Mwilson Veteran Member

    wow the tip is really hidden on that one!! br9es
     
  5. mrdragster1970

    mrdragster1970 Veteran Member Lifetime Gold Member

    .


    High compression, 13-1 & 14-1 with a 300 shot it has to be.
    Hell real fast cars run an 11 heat range now.

    .
     
  6. Mwilson

    Mwilson Veteran Member

    well swapped mine out tonite with Accels #0576S equal to a R44TS but shorter, old plugs look good
     
  7. mrdragster1970

    mrdragster1970 Veteran Member Lifetime Gold Member

    .


    How much difference was there in actual use??

    .
     
  8. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

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    Ringgold, GA
    R-44 is a pretty warm plug and the "S" means it an extended tip, not what you want for N2O. It might take a 100 shot for 1320ft, just be conservative with the timing.

    I learned the hard way, melted the grounding strap off a couple plugs like this many years ago.

    Edit again; here's AC Delco plug info, in case you don't already know.

    R45TS spark plug shown is:
    R- Resistor
    4- 14 mm Thread
    5- Heat Range (range 1-5 start with a 3)
    T- Taper Seat (No T for a gasketed plug)
    XL- Extra Long Reach, 3/4" fully threaded
    S- Extended Tip
     
    Last edited: Mar 8, 2018
  9. Mwilson

    Mwilson Veteran Member

    what do you mean difference in actual use?
     
  10. Mwilson

    Mwilson Veteran Member

    I would never spray all the way down just 2nd & high, I have a 4 deg timing retard for n20 activation
     

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