Ignition Systems Question

Discussion in 'Engine Topic' started by camaro_1980, Feb 10, 2019.

  1. camaro_1980

    camaro_1980 New Member

    Messages:
    5
    Likes Received:
    0
    Joined:
    Sep 2, 2010
    Location:
    Saskatchewan
    Please pardon my ignorance, my mechanical background comes from dirtbikes and sleds. I’m just now getting into working on my Camaro. I’ve been looking at upgrading my ignition system, but in all honesty I don’t know where to start. Can somebody provide the theory behind the upgraded systems and what is worthwhile on a stock 350 that’ll soon be getting an intake/carb upgrade soon. Thanks in advance for your help.
     
  2. 77 cruiser

    77 cruiser Veteran Member

    Messages:
    519
    Likes Received:
    19
    Joined:
    Nov 17, 2006
    Location:
    Frostbite Falls MN
    A stock GM HEI set up with the correct centrifugal advance & vacuum advance, is all you need.
     
  3. COPO

    COPO Veteran Member Lifetime Gold Member

    Messages:
    16,984
    Likes Received:
    397
    Joined:
    Sep 15, 1999
    Location:
    Ontario, Canada
    ^Agree^
     
  4. Goodwrench1965

    Goodwrench1965 Veteran Member

    Messages:
    924
    Likes Received:
    41
    Joined:
    Apr 23, 2010
    Location:
    Charlotte NC
    Certainly don’t forget the highest quality set of spark plug wires you can afford and separate them carefully from potential sources of damage like the exhaust! The best engine end ignition system in the world is compromised with cheap spark plug wires!
     
  5. COPO

    COPO Veteran Member Lifetime Gold Member

    Messages:
    16,984
    Likes Received:
    397
    Joined:
    Sep 15, 1999
    Location:
    Ontario, Canada
    Wires. That's why I'm using Taylor 8.2 mm ignition wires part # 84001 (40 ohms per foot resistance) in my 1970 Z28. I feel the difference too.
     
  6. Zspoiler

    Zspoiler Veteran Member

    Messages:
    2,916
    Likes Received:
    191
    Joined:
    May 6, 2012
    Location:
    Federal Way, Washington
    An HEI with a good set of spark plug wires >MSD,Taylor ,etc.and spark plugs, all properly tuned.And depending on application a high output box MSD .Crane etc if needed,
     
  7. jeff swisher

    jeff swisher Veteran Member

    Messages:
    803
    Likes Received:
    183
    Joined:
    Apr 26, 2018
    I have replaced a lot of fat so called good spark plug wires like 8.8mm etc.
    Seems people think those fatter wires can take more heat and lay them on the exhaust.
    Do not do that.
    I have ran hundreds of thousands of miles on factory issued plug wires and never had any issues with them ..maybe because the fastest my street cars went is mid 11's in the 1/4 and nearly 12.0 compression and 7500+ rpm.
    Maybe I did not need an expensive aftermarket wire.
    Fact is the HEI with stock GM module and coil was 2 tenths slower than my single point distributor with CS89 point set and a 1982 Ford coil off a straight 6.

    If your stuff is good there is no need to upgrade.
    I still run old GM HEI's and sometimes points when I run a tunnel-ram.
    Wires are now Belden or old solid core 7mm or whatever good factory wires I pull off a vehicle.

    Do not over think it.
    I will say I drive my stuff like a teenager and like shifting at 7000 rpm or more.
     
  8. 1980RS

    1980RS Veteran Member

    Messages:
    2,516
    Likes Received:
    237
    Joined:
    Jun 17, 2006
    Location:
    MN
    I run a locked out HEI and a MSD 6 on the race car, funny thing is it rune the same times with or without the MSD but the plugs stay cleaner. On my street cars I used to run the MSD ready to run distributors but after several problems I went back to points on one and different system on the other car. I have never had trouble with the older MSD stuff, just the newer stuff has been not so good for me anyway.
     
    jeff swisher likes this.
  9. jeff swisher

    jeff swisher Veteran Member

    Messages:
    803
    Likes Received:
    183
    Joined:
    Apr 26, 2018
    You mentioned spark plugs stay cleaner .
    My buddy ran the complete summit racing system with his HEI and he always had white plugs ..so he kept adding jet to the carb.
    We all went to the track racing and I took all my tuning stuff and he came over after many passes and said that he got all out of it she will not go any quicker.

    I told him drive it over to me I want to change a thing or 2.
    I opened his carb and pulled a bunch of jet out..I leaned it down.
    White plugs and all.
    I told him go make another pass.
    He came back all happy and said it went 4 tenths quicker and asked what i did.

    I told him that hot ignition system with multiple sparks is super cleaning the spark plugs and you can't get a reading off of them by just quickly looking at them.

    We chased a misfire that was like bouncing valve springs or lean popping and turned out he had a 6000 or 6500rpm rev limiter dialed into that thing.

    Very Funny!
     
    1980RS likes this.
  10. 1980RS

    1980RS Veteran Member

    Messages:
    2,516
    Likes Received:
    237
    Joined:
    Jun 17, 2006
    Location:
    MN
    I used to do the same thing adding jet to get the plugs to color until I realized that unleaded fuel won't do that. One needs to cut the plug apart after a run and look at the fuel ring to see where it's at. I think I burned myself at the track last fall after the single plane swap on the peanut port engine. I did not jet down like a dummy as a dual plane will like more jet than the single plane. After the last run I pulled a plug, sure enough it was pretty dark in color so it most likely ran fat. Oh well live and learn, I will have a wideband O2 on the car this year to not have to waste the day tuning and enjoy racing a little more.
     
    jeff swisher likes this.

Share This Page



  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.