69427

I could think of it like that, but I rarely enjoy playing make believe.

JustinD

What is it you are trying to prove?

Little Mouse

the secondary windings in the coil multiply the 12-14 volts going
into the primary, the old round type original coil put out 20,000
volts, some of same type aftermarket round coils with more windings
in the secondary can do say 30,000 volts. by comparison the modern
coils on the LS engines put out 120,000 volts and each one only has
to do the work of firing one cylinder. some of the new e-coils for
old cars 60,000 volts. but no matter the coil, if you
take a coil and the secondary windings are multiplying the 12 to14
volts, depending on coil 20,,30,,60,000 volts. now what happens if
the secondary windings of these same coils are no longer multipling
12 to 14 volts they are multiplying 500 volts with the box added.
500 volts is roughly 41 times the amount of volts going into the primary
of the coil compaired to just 12 volts.

69vettester

Quote:/You gave me marketing hype. I asked for engineering data. Trust me, there is a world of difference between those two items.

ps: Let's also cut the personal comments. I'm trying to have a technical discussion here. Please restrict it to that.\Quote


Looks to me Like Theres a Uptight "electrical Design Engineer" Thats Hijacked this Thread...Adios

69427

What part of "cut the personal comments" was unclear?

69427

Nothing. On the contrary, I am asking for proof regarding the claims made by some manufacturers, and some posters here.

69427

There are so many factual errors in this post that I don't have the time to correct them all. I sincerely suggest that you read a technical description of how ignition systems work, and you will recognize the many errors you have here. Trust me, your Corvette factory system would not start your engine if it tried to operate as you described.

68coupe

Hi,
To answer you question. I have a 6al box in my car and I also run Edelbrock Performer RPM heads.
Edelbrock recommends RC12YC Champion plugs, and MSD recommended a gap of .50.
I recently found out that Champion makes the same plug that is already gapped to .50. It is part number RC12YC5 and I have been using those.
Thanks,
Joe

JustinD

It is hard to keep ones personal comments to ones self when there is a person being so belligerent.

Obviously you are trying to prove something or you wouldn't go to such lengths taking time out of your own life to be a grump to other people that you don't have to meet face to face. So please instead of being like this, explain to us with your wealth of knowledge what we cannot seem to grasp.

To the OP: I run a .50 gap with a msd ecurve and a 6a box. You should be good with somewhere around there since it seems thats what most people run.

Hauq`

I run a .060 gap on my Proform HEI. I don't know where I read to do that, but it runs well and the headers are a pain to take off, so I may cut it down to .050 next time they are off.
I too have wondered about the gap of the plug; as I understand V=IR therefore adjusting the gap adjusts R. How much more resistance is .010 air gap I haven’t looked into. If the voltage coming out of the coil is constant then the larger the gap the lower the current. If the current is constant then increasing the gap increases the voltage delivered by the coil. If we make the assumption that the power (P=I^2R or P=V^2/R) delivered remains the constant then the increasing the gap increases the voltage required and decreases the current.
In my opinion if you run a large gap you can expect it to be more taxing on your coil and you may have to replace it sooner then a smaller gap.

Little Mouse

What I said is correct. people from the race track to the street that are using the
multiple spark discharge CDI they are all morrons.

69427

I have no vested interest if one wants to run a CD or inductive system. When I hear some extraordinary claims about something, I am usually interested in some facts to back up the claims. And so far, I'm not hearing any. If someone wants to say their car runs fine with their system, great. I'm happy for them. But, if you're going to make a technical statement, please back it up. This doesn't seem unreasonable to me.

69427

I stand by my comment regarding the accuracy of your technical statements.
I have not made any comments regarding the intelligence of people using MSD systems. It's not relevant to the discussion, and I would speculate that there is a wide range of knowledge among users of this product, just like cam buyers, carb buyers, etc. As long as someone is spending their own money on their parts, and are happy with the performance, that's great. I'm merely asking for data to back up some of the extraordinary claims I'm hearing.
(I'm getting tired trying to get this point across.)

ps: Moron is spelled with one r.

everest29

After 3,000 RPM's there isn't enough time for three sparks so it changes to one large spark. You need to go to the MSD website because it explains this better.

FB007

Simple really. If it's in print, it must be true.
Best place for an MSD box is the trash can.

V-Rod

I think that it's a theory and you can not prove a theory. I assume that it's MSD position that their 3 sparks at low rpm are better than 1. Eistine ( that may not be spelled correctly ) could not prove his theory of relitivity. All those top fuel & funny cars with the double MSD systems on them are not there because of marketing hype. where is your proof that the statements made above are incorrect. everyone has an opinion. This site is not the IQ bowl there does not have to be one correct answer. Everyone is a winner from the knowledge shared here but back biteing severs no purpose.

FB007

Top fuel and funny cars use magnetos, not CD systems.

NASCAR uses CD systems, but uses two, since 1 fails often. They are also NOT the units you buy at Summit.

69427

I absolutely agree with both points in your sentence here.

ps: Not a trick question, but a slightly relevant one. Do you own a V-Rod?

V-Rod

I know what magnetoes are ( to some extent ) they produce their own current for one ie don't need battery to run, they are a back up system yes but they also contribute to preformance. if you have ever been in a small plane when the pilot did his runup test you would have noticed an rpm drop when he checked his mags. I don;t know anything about ignition system or engines. my point was that if MDS systems are being used by the big boy their products are sound. my engine builder has 30 yrs exp and that's the system he used. my second point was this is not the place to prove who is the smartest. This fourm is for discussion not a p***** contest.

V-Rod

Yes I have a 2000 V-Rod and I think it runs on a mag too. I has a stage one screaming egale kit and will hit 60 in !st. I am not trying to pick sides here I just think things got out of hand last night