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spark plugs gap and redline question

Discussion in 'Forced Induction' started by techavluis, Sep 10, 2012.



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  1. techavluis

    techavluis New Member Registered VIP

    Joined:
    Feb 16, 2010
    Messages:
    372
    Location:
    Orlando, Fl
    so got my car tune some time ago but wanted to see how people feel about two things. spark plug gap and redline.

    about the gap. i have msd wires, cap, and booster core. when i tuned my car my tuner wanted me to gap to .08 in which i feel like it should have been way more. he told me that you dont want to go more and then deal with blow by (blowing the spark out). but i feel i can easy do .20 or more with the msd set up. what you guys think?

    with redline, i have a fully build head and block. redline at 7300. but tuner told me i shouldnt go higher since its a d series. but when shifting gears the rpm are dropping just at the point of when i start building boost making it that every lagy every shift. (turbo is a precision 5431) i feel like maybe a redline of 8500-9000 would be fine for a build motor. what you guys think?

    also note, i did tell my tuner that altho i went wild with my build and build the s**t out of it and even sleeved the block that i wanted to be very safe. i wanted to drive the car hard and not worry about being on the line of max for my motor. thanks guys.

    if u want more info on build
    http://www.clubcivic.com/board/showthread.php?t=191947

    video
    http://www.youtube.com/watch?v=Oe3ku7HIIOE&feature=youtu.be
     
  2. techavluis

    techavluis New Member Registered VIP

    Joined:
    Feb 16, 2010
    Messages:
    372
    Location:
    Orlando, Fl
  3. techavluis

    techavluis New Member Registered VIP

    Joined:
    Feb 16, 2010
    Messages:
    372
    Location:
    Orlando, Fl
  4. civhatch92

    civhatch92 That's my honda. Registered VIP Registered OG 5+ Year Member

    Joined:
    Apr 20, 2007
    Messages:
    4,045
    Location:
    Pennsylvania
    Not too much knowledge about the spark plug gaps..

    You're saying shifting at 7300 rpm is dropping you of of the boost zone? Maybe you need a smaller turbo so it actually spools. I've got a fully built B16 my redline is at 9k rpms, however I HAVE NEVER went to redline since my rebuild.. I shift around 7k and I'm always in the boost!
     
  5. obracer12

    obracer12 New Member Registered VIP 5+ Year Member

    Joined:
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    if you fall out of boost it is due to your turbo sizing. Running a standard .55 or .65 AR turbo you should stay in boost throughout the power band with supporting modifications. (please re-read to make note of all important parts) if any of them are off then your powerband shifts down or up. As for going to redline, there is 0 reason to do so in any situation (sans an emergency). having said that, 6800 is your redline on a Y8 meaning without extensive internal modification past 6800 there is a large potential for an unbalanced condition at those revolutions... meaning it will break stuff.

    relines of 8500-9000 are when you start getting into girdle support and with the Y* the oil pick-up is integrated (for the most part) into the windage(sp) tray... making it extremely difficult to have the structural integrity increased due to the need for there to be a tube in the middle of it.

    In both cases, I would take the tuners advice.. .it's why you paid him in the first place.

    As for gap on the plugs, it really depends on the plug. If you are using OEM replacements (aka long plugs) from autozone I would gap them more then your 2 steps cooler (aka short plugs). If you were to tell us what brand and model of plug some of us would be able to better advise.
     


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