Ignition Coils-Anybody have the scoop?
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Ignition Coils-Anybody have the scoop?

  1. #1
    These colors don't run BLWN BUX's Avatar
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    Default Ignition Coils-Anybody have the scoop?

    Hi,

    I found this article about ignition coils.
    http://www.hotrod.com/techarticles/i...ech/index.html

    It would seggest that there is some preaty significant difference between them that could effect performance.

    I would almost like to see a coil-dyno sheet to pick a good choice.

    I don't have the exrta $$ to go buy 3-4 coils just to try out
    The MSD HVCII (8253) is the most expensive "msd" piece I see for the 6 series boxes

    The article was written for cars but it has good info.

    I have a jet boat and am only concerned about ignition performance between 4K-6K RPM

    Anybody do any MSD coil recomendations /comparisons on there boat that they can share?

    Thanks

    chad
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    Senior Member steveo143's Avatar
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    I run that coil on my twin turbo 496, with no problems.
    steveo143 AKA DiMarco 21 II



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  4. #3
    gn7
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    I am going to go out on a limb here, on the grounds that there is somebody on these boards that can smack me and anybody else when it comes to this stuff. He may come on here and thow his two cents in. Maybe not. Sadly, he as not been recieved well by a couple of stooges, and may perefer to stay out of this. We'll see.

    Here goes: The artical was primarily aimed at induction type ignitions. Coil tuning with them can be huge. On a capacitive discharge type ignition, the coil act more as a transformer, than does an inductive coil. Althought critical to the coil type, there isn't as much room for change, or results. In the artical they talk about a Pro Power 8201 and Pro Power HVC8251 compared to a a Blaster 8202. Well, if you read the whole articale, the 8201, and 8251 cannot be used on a MSD 6. And even if you could use the Blaster 8202 on a MSD 7, you would be pretty stupid to do so. MSD has done their home work. They know what works with their stuff. They do make different coils and the price is all over the map. But price isn't what makes it a better pick performance wise. The HVC II 8253 is a great coil. I run it. It will suvive a nuclear blast. It is almost immune to vibration, and can be used in a long endurance, low RPM condition with zero issues. The Pro Power 8201 for the MSD 7 cannot. It is a strctly drag race coil for the MSD 7.

    Don't lose sleep over this. There is no magic bullet here. There are far more, vastly better places to gain a single MPH in your boat.

    But we may hear some thing different from somebody who truley knows the game. and if we do, I'll right here to learn something



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    Default Ignition Coils and lightning in a jar

    Sir, and others interested in this stuff,

    Depending on which MSD ignition amplifier unit that you have on your rig, but in general for the RPM you indicated and the application I think you would be hard pressed to beat using the MSD Blaster or an Accel 140108, or even an old Accel 140001. The first two are smaller and the last one is big, yellow and ugly with no appreciable gain in output.

    You can spend more $ but not get a gain for the $ spent particularly for the RPM range you are targeting. IF you have a good secondary wire set (spark plug wires) then I would suggest that you use a gap of about .045" on your plugs. Some even get away with more but it is a marginal gain and does contest the integrity of the secondary system.

    Regards,
    IG
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    gn7
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    BLWN BUX, without going into a bunch of details, let me assure you, IG is more than a tiny bit qualified to be commenting on the subject.

    I will add though. I have destroyed 2 Blaster canister type coils due to the pounding in a GN. I have yet to hurt a HVC type coil. MSD does make a lower price solid "E" type coil.
    http://www.summitracing.com/parts/MSD-8207/



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    Default Oops! Didn't think about kidney damage

    Mr GN 7,

    You have brought up a good point and it completely escaped my mind. Thanks for the comments.

    I have long forgotten about how much the continous chop beats up parts and kidneys....I once did a marathon race on Lake Mead and did some of it with a taped up arm (due to an A-C separation before the race). Was sitting on a conventional seat instead of a Nordskog endurance seat and absolutely destroyed the seat in a few laps. It also beat me up and had to come in for a relief pilot.....Ouch. I even had to have the waiter cut up my steak at dinner afterwards. So much for the macho gig!

    So by all means choose a coil mounting that is supportive of shock loads or go from the experience of others and use their experience as data from a testing "shake table". All I was thinking was about the characteristics of the spark.....My how scummy it is to get old.

    Regards to all,
    IG
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    Thanks guys for all the info

    Good points about the beatings that the coils can take from the water chop.

    I didn't consider this much because my boat is a 3500# tunnel.
    It has a heavy ride

    I have a Blaster 8202 (Canister type) on it now with a 6M Box
    I run a 540 whipple charged @ 6# of boost
    Plugs gapped at .030" now

    Gona be trying some larger gap points

    Should I be considering a different coil?
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  10. #8
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    Quote Originally Posted by BLWN BUX View Post
    Thanks guys for all the info

    Good points about the beatings that the coils can take from the water chop.

    I didn't consider this much because my boat is a 3500# tunnel.
    It has a heavy ride

    I have a Blaster 8202 (Canister type) on it now with a 6M Box
    I run a 540 whipple charged @ 6# of boost
    Plugs gapped at .030" now

    Gona be trying some larger gap points

    Should I be considering a different coil?
    I have run gaps as wide as .045 with 12 lbs, and although there may have been a little there, it wasn't worth the risk of a miss fire or cross fire. It wasn't any huge increase, thats for sure. Or I'd still be doing it. For a non drag race deal, we felt the relieablity was a larger factor. We run a .035 with zero issues. As for a different coil. I doubt you'll see anyhting. MSD knew what they were building when they made the Blaster 8202. If you have no reliability issues, I don't buy a different one. Your boat may not beat it up like a marathon endurance boat. But if it is mounted to the engine, I'd try to make the vibration it is subjected to, as little as possible.



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    i run an hvc II (pn 8261) because that's what msd recommended with the digital 7.
    a few years ago, i had a problem and it was thought to be the coil. we installed a smaller hvc, and at the same time, bypassed the crank trigger (and retimed).
    i can't say for certian it was due to bypassing the crank trigger, or changing the coil, but the engine lost over 200 rpm and i went home early. on the drive home, i figured out what the problem was, and once home, put everything back the way it was (reinstalled 8261), and the engine ran like it was supposed to.

    the moral for me is, if msd recommends a specific coil for a specific ignition, that's probably going to work the best.
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    Does anybody run a .025 plug gap on anything? I have a buddy with an mds n/a bbc runnin that gap...
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    All this has got me thinking, a couple of weeks ago I thought about replacing the MSD 8222 Blaster ( High Vibration) with something with more power for the MSD 6 we run. He run MSD 6's for years and never had a problem with them.

    Is there a coil better or stronger than the 8222 to work with the MSD 6 ?

    S CP

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    Quote Originally Posted by Sold honda.bought hondo View Post
    Does anybody run a .025 plug gap on anything? I have a buddy with an mds n/a bbc runnin that gap...
    Corvette Guys running Vortec,s or prochargers on there small blocks are running a tighter gap.
    We also run water/ alki spray as our intercoolers (No room under a vet hood for much of anything else.) This may or may not have some influence.

    In my vett, I run a 383 with AFT heads, and Vortec "T" trim @ 14 lbs.

    At .035 gap It seam to get a bit of a top end miss after the sparkplugs get a little worn and loose their edges.

    The Corvett form guys have the same problem and hooked me up with tightening the gap to .025. it didn't seam to effect the performance, and now I don't have to change the plugs every 3,000 miles or so
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    Quote Originally Posted by Sleeper CP View Post
    All this has got me thinking, a couple of weeks ago I thought about replacing the MSD 8222 Blaster ( High Vibration) with something with more power for the MSD 6 we run. He run MSD 6's for years and never had a problem with them.

    Is there a coil better or stronger than the 8222 to work with the MSD 6 ?

    S CP

    Jon
    Not really Jon. Thats kind of the point of this thread. the coils that MSD matches to their boxes is pretty much all the power you are going to get from THAT BOX. I will only say, if the 8222 takes a dump, I would go to the 'E' core type solid coils like the HVC coil for a MSD 8207, 8250, 8252, or the get down a dirty 8253 "U" core. Both the E and U core coils are almost indestructable, and impervious to vibration.



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  16. #14
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    Quote Originally Posted by Sold honda.bought hondo View Post
    Does anybody run a .025 plug gap on anything? I have a buddy with an mds n/a bbc runnin that gap...
    Waaaay too small for a N/A Deal. I would be all over a .45 gap on almost any N/A motor. Pump gas, maybe even a little bigger. The only people running gaps that small (and smaller, down to .018) are running mags. What does that tell you about a mag.



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