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Re: Ignition coil testing?
[Re: tboomer]
#1206339
03/30/12 09:37 AM
03/30/12 09:37 AM
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Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,421
Taxes & Virus's R-US, NY
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Quote:
Anyone have an idea on testing a coil? I have an old Accel super coil on the car now. I swear that it came over on the Mayflower!!  If I replace it,I am going with a new Firecore coil. I also would like to update the MP electronic dizzy to a Firecore but funds are pretty low...Has anyone one seen positive results from a hotter coil? Thanks!! Ted 
I just had one of those fail...PITA to find it too. I was just bench testing them by the brightness of the arc, and their are much hotter ones than the Accel POS. A hotter coil is always better for racing, and Rick once said their Firecore coils are almost too hot, which is right about my speed, so I would get one of those. I did not have many different ones to bench test, I used what I had available, and I think it makes a big difference under load.
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Re: Ignition coil testing?
[Re: tboomer]
#1206347
03/30/12 10:46 AM
03/30/12 10:46 AM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
...What if I could have found that magic .2 with...
STOP THINKING LIKE ME!!! It's a dangerous - and EXPENSIVE - pattern to get into. 
Yeah, if all you wanted was .2, I suspect that going for different heads, etc., was freakin' overkill. 
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Re: Ignition coil testing?
[Re: tboomer]
#1206349
03/30/12 11:01 AM
03/30/12 11:01 AM
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Joined: Jan 2003
Posts: 17,923
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,923
S.E. Michigan
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I did that once pre-msd. Ran every combination I could think of with orange box, chrome box, big ugly goofy looking yellow super coil, msd blaster 2 coil. Made a bizzillion passes that day and never found anything Would like to try the same type of test with an msd box and a few different/more up to date coils...but am thinking the same thing might happen. Maybe tuned on the hairy edge of lean, there might be more difference?
Rich H.
Esse Quam Videri
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Re: Ignition coil testing?
[Re: BradH]
#1206350
03/30/12 11:16 AM
03/30/12 11:16 AM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
What I can say is that certain coils are better suited to particular ignition boxes and applications
Exactly right. I have been testing different combinations on one of my big blocks on my dyno. What ignition system (box)are you running?
The box/distributor/coil all have to work together. Mopar distributors use a pick up coil with very little resistance,and most similar magnetic pickups act the same.
MSD's have a higher resistance but the box works differently.
I answered another post a while back about this,and like I said there,I can't give away everything just yet due to a product I am testing for someone else.
I have tested several coils,boxes,and a couple of distributors. The coil does not just make a hotter spark compared to another one,it turns low voltage into high voltage. The time it takes to "charge up" (rise time)and how long it takes to discharge the energy (spark duration) all make a difference.
There are other factors too,but you get the idea.
Like I said though,I can't tell you everything yet but MP boxes work better with an Accel coil than an MSD on the dyno with their dist.
And as I said in the other post,I need to get ahold of Rick @ Firecore and get some of his products to compare. I have reccommended his products to a few customers who were looking for new systems and/or wires before,so I guess I should test them to see how they work 
Keith
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Re: Ignition coil testing?
[Re: tboomer]
#1206353
03/30/12 04:08 PM
03/30/12 04:08 PM
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Joined: Aug 2003
Posts: 43,352
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,352
Bend,OR USA
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Ted, there are different ratio windings on coils, 200 to 1 versus 400 to 1 and so on, these may not be the accurate ratio but you get the drift. I did some ignition box testing for Bill Hayes way back in yesteryear, one of his boxes used a standard point type coil, didn't matter what brand or for which car, another box, S4, had to use a specific brand and part number coil for the box to work correctly, it was faster on the car, NHRA stock 426 Street Hemi, than the stockdual points where. I later switch to the Mopar brand race ECU with the blue heat sink, it needed a specific Accel coil part number, that died at the track so I switch to a early MSD 404B, it required a Mallory 28880 coil to work properly, faster rise time to spark multiple times at idle and up in the RPM range  That ignition made the car start and idle better when cold and it made the car pull in high gear in the smog of L.A. in the summer, 2 to 3 MPH faster than with the Mopar blue heat sing ignition  I did some testing on a distributor machine one night at the local speed shop with that coil, we managed to burn up two MSD 5 boxes using that coil before we realized those MSD 5 boxes weren't compatable with that mallory coil  My message is different coil ratio winding may be needed for different boxes 
Last edited by Cab_Burge; 03/30/12 10:22 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Ignition coil testing?
[Re: smokinwoody]
#1206360
03/31/12 09:31 AM
03/31/12 09:31 AM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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Turns ratio gets you voltage, which is good for nothing but jumping the gap. You need amperage to go with the voltage. Look for low primary and secondary resistance in a good coil.
Yeah, it's got a smallblock.
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Re: Ignition coil testing?
[Re: tboomer]
#1206364
03/31/12 11:17 PM
03/31/12 11:17 PM
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Joined: Feb 2009
Posts: 1,532
off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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A high amperage coil would be more likely to cook your MSD, but they make it easy with recomendations on their website. For example, a factory stock engine only needs a coil capable of 20K volts. If you need more, theres something wrong w/ the engine. I use one of the first MSD HVCII coils and it's capable of 42K volts. The engine has been well over 7000 rpm(oops) with that coil.
Yeah, it's got a smallblock.
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Re: Ignition coil testing?
[Re: 340B5]
#1206365
04/01/12 08:21 AM
04/01/12 08:21 AM
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Joined: Apr 2004
Posts: 12,339
somwhere
smokinwoody
I Live Here
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I Live Here
Joined: Apr 2004
Posts: 12,339
somwhere
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another food for thought I had a 7al-2 burn out..was from a pro coil going DRY... I called one of the MSD gurus that works on his own repairing the BOXES, and he told me to shake the coil and see if theres still fluid in it...mine was dry...he says thats what burns out the boxes with that type coil... as far as too much voltage on the secondary side of a coil burning out a 6al, I doubt it...I jumped up in voltage with the Firecore coil over the HVC and Im not experiencing any problems... as a matter of fact I have a Blaster3 coil with the MSD 6BTM box for over 16 years in my Blazer without a hitch... 
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Re: Ignition coil testing?
[Re: smokinwoody]
#1206366
04/02/12 12:07 AM
04/02/12 12:07 AM
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Joined: Jul 2003
Posts: 12,129
Cleveland
sunroofgtx
I Live Here
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I Live Here
Joined: Jul 2003
Posts: 12,129
Cleveland
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Hey Ted. Yes, different coils absolutely affect hot hot an ignition system works. Give me a call tomorrow. We'll talk about the FireCoreCD coil. Good talking to you last week. My wife went into the Hospital Fri for a pretty serious surgury. All week we were pretty tied up. Thanks
Join the quickest team in motorsports. Team FireCore. CustomWiresets.com
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I hate electricity...Getting cracked with 460 one time is all that took!! 
