Topic: Dynatek vs Magna 5 Ohm Coils

[evanphi]

Is there a difference other than brand name?

Can anyone attest to the quality of the Magnas? I know lots of people have good results with the Dynatek products.

This kit: http://4into1.com/magna-5-ohm-coils-and-caps-honda-cb750-1969-1978/

vs:

This
http://4into1.com/dynatek-5-ohm-black-coils-dual-output-dc8-1/
Plus
http://4into1.com/dynatek-dyna-ignition-wires-7mm-copper-core-black-dw-200/

[firebane]

Glad you posted this as I was looking those Magna coils as well as I'd like to upgrade mine to replaceable leads.

[Duanob]

Save yourself almost $50 on the Dynas:

http://www.ebay.com/itm/Dynatek-DC8-1-5-0-ohm-Coils-Dual-Output-Honda-CB500-CB500-CB400-CB350-1969-78-/191681504263?_trksid=p2141725.m3641.l6368#rwid

[firebane]

Save yourself almost $50 on the Dynas:

http://www.ebay.com/itm/Dynatek-DC8-1-5-0-ohm-Coils-Dual-Output-Honda-CB500-CB500-CB400-CB350-1969-78-/191681504263?_trksid=p2141725.m3641.l6368#rwid

Problem is that by the time I've invested into either 4into1 or that Ebay link I'm well over the $200 mark.

If I can spend half of that on coils I will.

[drumstyx]

"Current Stock:
Out of stock"

Will it ever come back in, I wonder though.

[evanphi]

"Current Stock:
Out of stock"

Will it ever come back in, I wonder though.

Well dang. There were two in stock this morning.

[Lostboy Steve]

I got mine on eBay but the guy had them listed wrong and so I snagged them for 50$ brand new. They are the older version 5ohm dual output. They work great.


Sent from my iPhone using Tapatalk

[Duanob]

Save yourself almost $50 on the Dynas:

http://www.ebay.com/itm/Dynatek-DC8-1-5-0-ohm-Coils-Dual-Output-Honda-CB500-CB500-CB400-CB350-1969-78-/191681504263?_trksid=p2141725.m3641.l6368#rwid

Problem is that by the time I've invested into either 4into1 or that Ebay link I'm well over the $200 mark.

If I can spend half of that on coils I will.

Not sure I follow your thinking. They are sold in pairs. $106 for the pair.

[firebane]

Save yourself almost $50 on the Dynas:

http://www.ebay.com/itm/Dynatek-DC8-1-5-0-ohm-Coils-Dual-Output-Honda-CB500-CB500-CB400-CB350-1969-78-/191681504263?_trksid=p2141725.m3641.l6368#rwid

Problem is that by the time I've invested into either 4into1 or that Ebay link I'm well over the $200 mark.

If I can spend half of that on coils I will.

Not sure I follow your thinking. They are sold in pairs. $106 for the pair.

106 + 24 = 130 USD = $170 CAD (depending on day of exchange)

[drumstyx]

Save yourself almost $50 on the Dynas:

http://www.ebay.com/itm/Dynatek-DC8-1-5-0-ohm-Coils-Dual-Output-Honda-CB500-CB500-CB400-CB350-1969-78-/191681504263?_trksid=p2141725.m3641.l6368#rwid

Problem is that by the time I've invested into either 4into1 or that Ebay link I'm well over the $200 mark.

If I can spend half of that on coils I will.

Not sure I follow your thinking. They are sold in pairs. $106 for the pair.

106 + 24 = 130 USD = $170 CAD (depending on day of exchange)

Cables connectors and caps run more than $24 too the Canadian dollar sucks so much right now

[evanphi]

There's also this option: http://www.ebay.com/itm/Magna-Dual-Output-Coil-5-ohms-Set-of-2-Honda-CB350F-400F-500K-550-750-/172464648744?hash=item2827b1b228

And just get the caps and wires locally.

Here's the dynatek's in Canadian dollars: https://fortnine.ca/en/dynatek-coil-5-0-ohm-12v-angled-dual-output-black-dc8-1

[evanphi]

Either I can replace the coils...

OR

What about splicing new wires with an NGK splice piece? This is really all I want to do, I just want some more length in my wires, and they are no longer flexible.

[drumstyx]

Either I can replace the coils...

OR

What about splicing new wires with an NGK splice piece? This is really all I want to do, I just want some more length in my wires, and they are no longer flexible.

I'm not an expert, but high tension wires are usually wear parts, with an interval of something like 6 years on many bikes. I wouldn't splice them. If you really need new wires (I can probably live with what I have for a bit) I'd get new coils.

[Duanob]

Ah, didn't know you're in Canada, well that's the high price of living in paradise, eh?

[evanphi]

Worth it.

[drumstyx]

FYI, it looks like it's just the NGK 102 degree cap that's out of stock, which is causing the cart system to mark it out of stock. The coils themselves are in stock...All the CB750 kits are 'sold out' there because of that one cap.

BUT, the coils are $95, only $12 less than the known and trusted Dynateks.

I might be wrong, it's a 120 degree connector in the image...I should check mine at home. You can 'build' the kit for $120 USD on the site, for a total of ~$140, which is $30 less than if you just bought the hardware from 4into1 and the dynatek coils on ebay.

[drumstyx]

FYI, this might be a better option for Canada -- free shipping http://www.ebay.ca/itm/Dynatek-Coil-5-ohm-Dual-Output-Coil-Honda-CB500-CB550-CB-350-400-500-550-69-78-/140792245936?hash=item20c7df2eb0:m:mWUbYuxWIuLFuo3ctGS9ehA&vxp=mtr

[RAFster122s]

There is a hack to cut into coils and replace wire where it terminates. Then you solder new wires to the coil output, pot this joint when verified you have good termination before potting the end, then youcover the rest with RTV or you could use epoxy putty, sand smooth, clean slap a littleenamel or other weather resistant paint over the epoxy.  Make the wires long enough for trimming more than 4 times.  That is at least an inch when you are cutting 1/4 inch of wire off for new or reattaching plug caps. 2" is what I would do.  If your old sleeves are removeable and will fit your new wires then slip them on the new wires after scrubbing clean with soap and water..the sleeves with numbers painted on to provide more heat insulation and uv protection plus IDing the wires.

Or, you can pick up a replacement pair of coilsfrom cb750 supply for $34 each, currently on sale.  They are 5 ohm points design coils.  Just need a new set of NGK plug end...5k ohm unless you are going to run resistor plugs or Iridium resistor plugs if your bike is running clean enoug to not foul a set of 40-45$us plugs.
HondaMan has recommended those coils as good replacement.

[drumstyx]

I bit the bullet for you, OP -- I bought the Magna kit, as it came back in stock. We'll see how it goes, but I don't have Dynateks to compare them to.

Now I need to figure out how crimping these works....

[evanphi]

I bit the bullet for you, OP -- I bought the Magna kit, as it came back in stock. We'll see how it goes, but I don't have Dynateks to compare them to.

Now I need to figure out how crimping these works....

I think I will too.

Did it. Shipping costs to Canada suck nuts.

[drumstyx]

Of note: the secondary resistance for the Magna coils (17,500 ohms) is different from the secondary resistance of the Dynatek coils (14,400 ohms).

I have no idea which is "better", as I have no idea what secondary resistance actually means.

EDIT: Just noticed the Magna ones advertise "over 30,000 volts per output" while Dyna coils advertise "over 40,000 volts per output". A difference, but probably not hugely significant, as I'm sure 30,000 volts is still much higher than whatever the stock coils were at.

[PeWe]

The Magna coil look like a Dynatek copy. Is it a new brand of coils?
I need coils for my K2 and the coils have increased in price since 2 years ago, maybe +25% or the $ currency only. I have not found any test/review of the Magna coil.
Edit: 3 years ago

[Deltarider]

Just noticed the Magna ones advertise "over 30,000 volts per output" while Dyna coils advertise "over 40,000 volts per output". A difference, but probably not hugely significant, as I'm sure 30,000 volts is still much higher than whatever the stock coils were at.

Adverisement bla and irrelevant for normal use. Your plugs probably will spark at 7000-9000 Volts allready. The sparkplug gap and the 'atmospheric circumstances' in the combustion chamber determine the voltage reached. A higher voltage is at the cost of a shorter spark duration. Nothing for free and there are no miracles here.

the secondary resistance for the Magna coils (17,500 ohms) is different from the secondary resistance of the Dynatek coils (14,400 ohms).

Around 14,4 kΩ is close to what OEM coils are, so that would be my pick. Primary impedance should be close to 4,7 Ω when your ignition operates at a standard dwell.

[Bvatlestad]

Did anyone come to a conclusion regarding the Dyna VS the Magna coils? Does the Magna coils work ok? It is a lot cheeper...

[drumstyx]

Did anyone come to a conclusion regarding the Dyna VS the Magna coils? Does the Magna coils work ok? It is a lot cheeper...

I never did run the bike with the stock coils, or anything but these Magna coils, and to be entirely transparent, it's always given me trouble starting and never run 100%. However, this was a full top-to-bottom rebuild, with aftermarket pipes, some screwups in the carbs, aftermarket air filter, and Hondaman's ignition system, so I really can't say anything about them compared to a stock, well-running bike.

Bottom line: They work. Whether they work better or worse than anything else is a question mark. Heck, I might throw on the old coils to give 'er a shot at some point though.

[bryanj]

For a coil repair how to go to sohc.co.uk and look in alladins cave, a long time member has done an excelant write up and has used the coils himself

[drumstyx]

Well this aged.... interestingly... Canadian "paradise" 😂 haha I sure wish I'd bought the dynatek coils back then, because the canuckistan peso has only gotten worse lol

Been doing some fiddling to try and finally get this thing sorted and running well (after all that time and expense, alas, I have to sell her), and having found that ignition was main my gremlin all along, I ended up finding this thread again. The Magna coils haven't failed or anything, and the bike is actually running amazingly after cleaning the points and using plugs that are actually....functioning (I didn't know that the center electrode actually losing all continuity to the stud was a possible failure mode at all.... But that's another story), but I was curious if maybe the difference in secondary resistance would make any kind of difference practically, so I went to see how much the coils were now...

What the heck happened to the price of dynatek coils? $183USD is the absolute lowest I can find for a set that was $107, from what remains of the eBay listing from 8 years ago. Inflation happens, yeah, but -- at least according to the official sources -- inflation accounts for less than half of that. Looks like 4into1 doesn't even sell dynatek coils anymore... Am I missing something?

[Deltarider]

All aftermarket coils I've seen are generic products and they will never be an optimal replacement.
What I disliked about my Dyna coils, is not so much te coils themselves, but the fact that you're forced to Dynatek's HT wires, which are way too supple in the riding wind on a SOHC engine. One coil already gave up after 50.000kms (my stored OEM coils still work flawlessly) and I think this moving about of the HT wires impedes solid connections, both at the plugcaps and the coils. It takes very little to compromise electric connections. The silicone Dynatek plugcaps in itself are good, but they have no inbuilt resistor and they force you to have R(esistor) type sparkplugs and - after having had them - I have joined the choir that dislikes these plugs, that is... on CBFours. The Dynatek rubber caps over the HT connectors age and become stone hard, almost impossible to remove. The Dyna connections in the primary curcuit are not protected at all again humidity. Oem is superior here. All in all, these coils are typical generic and one should weigh this in a decision.
What Honda could have done better? IMO, screw-in connections at the coils, so you could periodically renew the HT wires and yes, HT wires age. The 'problem' with our CBFours is, that they are so very forgiving that you will hardly notice intermittent misfires and, believe me, they are there. Connections must be very robust. On our bikes you'd better have HT wires that are on stiff side and will not move about. Especially as far as the CB500/550s, the plugcaps and their connections have always been the Achilles heel of these bikes. I have multiple proof of this in various published riders reports.
I don't know why so many seek a 'solution' in spending money on new coils where they haven't even diagnosed what the problem is. One of these days, I hope to build a basic relay driven tester for coils and plugs. I've seen some simple designs on Spanish sites that I like, but if any of you has already built one, please share this. A 12V power source, a relay, a condenser and some wires is all what it takes to have a basic under 8 bucks one. Maybe any of you can advise us to add an extra to create a variable 20-200Hz range.
Personally I always look for materials that I have already lying around. The less we buy, the better for the planet.

[bryanj]

Dynatec coils are probably produced in the far east so tarrifs come into it

[MRieck]

All aftermarket coils I've seen are generic products and they will never be an optimal replacement.
What I disliked about my Dyna coils, is not so much te coils themselves, but the fact that you're forced to Dynatek's HT wires, which are way too supple in the riding wind on a SOHC engine. One coil already gave up after 50.000kms (my stored OEM coils still work flawlessly) and I think this moving about of the HT wires impedes solid connections, both at the plugcaps and the coils. It takes very little to compromise electric connections. The silicone Dynatek plugcaps in itself are good, but they have no inbuilt resistor and they force you to have R(esistor) type sparkplugs and - after having had them - I have joined the choir that dislikes these plugs, that is... on CBFours. The Dynatek rubber caps over the HT connectors age and become stone hard, almost impossible to remove. The Dyna connections in the primary curcuit are not protected at all again humidity. Oem is superior here. All in all, these coils are typical generic and one should weigh this in a decision.
What Honda could have done better? IMO, screw-in connections at the coils, so you could periodically renew the HT wires and yes, HT wires age. The 'problem' with our CBFours is, that they are so very forgiving that you will hardly notice intermittent misfires and, believe me, they are there. Connections must be very robust. On our bikes you'd better have HT wires that are on stiff side and will not move about. Especially as far as the CB500/550s, the plugcaps and their connections have always been the Achilles heel of these bikes. I have multiple proof of this in various published riders reports.
I don't know why so many seek a 'solution' in spending money on new coils where they haven't even diagnosed what the problem is. One of these days, I hope to build a basic relay driven tester for coils and plugs. I've seen some simple designs on Spanish sites that I like, but if any of you has already built one, please share this. A 12V power source, a relay, a condenser and some wires is all what it takes to have a basic under 8 bucks one. Maybe any of you can advise us to add an extra to create a variable 20-200Hz range.
Personally I always look for materials that I have already lying around. The less we buy, the better for the planet.

I always use the dielectric silicone grease on the plug caps....much easier to remove. Personally I've never had a problem with the Dyna wires but I keep them at a minimal length. If I need wires now I use an MSD kit and make my own though MSD stuff is a bit pricey.

[papi_sosaa]

I always use the dielectric silicone grease on the plug caps....much easier to remove.

I'm being told on my thread that dielectric grease is no good.

[bryanj]

In this instance i would believe Mike over others, the work he does is absolutely fantastic and his reputation second to none

[PeWe]

I use copper leads with my Dynatec 5 ohm coils.
NGK 5 kohm caps. Non resistor spark plugs.
Dyna S ignition. I have used stock  points with Hondaman ignition too.
No grease needed

The Dynatek silicone caps sat as glued so they need antifriction stuff.

The stiffer lead will not glide out of the Dyna coil auto connection type as softer models can.
Did for me, wind and when washing the bike.
1 and 4 leads strapped to frame with a piece of fuel hose around the lead where strapped as extra insulation.

I have a set of China knock off  5ohm coils too. Not used yet. Had to order when it was cheap.
Have Dyna-S knock offs too. Nit used yet.
Ordered from eBay USA.
2 sets cheaper than 1 original.
Look very similar as the original.

I think Terry has used the knock offs, coils and ignition. Discussed in another thread a few or 2 years ago.

[drumstyx]

In this instance i would believe Mike over others, the work he does is absolutely fantastic and his reputation second to none

Perhaps second only to our resident superhero, Hondaman. Mark and Mike have, frankly, been inspirations to me in through their passion for these machines.

...Plus I've given them many a paycheque, so I need to justify that 😂😂 worth every penny, I know!

Anyway, I know what you mean with the floppy wires,...actually, it might not end up being an actual issue, but I did notice that it isn't too terribly hard to move the coil-side terminals around a little bit inside the coil sockets. It wasn't like they were falling out or anything, because of the boots, but those boots are definitely not any kind of 'positive' feeling lock. It's possible that that movement is enough to cause some weak intermittent weak spark issues I was having.

My stock coil wires were just so stiff, I was worried I'd be breaking a connection inside or something whenever I had to move them. They also looked to have plenty of corrosion at the screw-in side of the wire, and I don't think I had any slack in them to trim them, but they measured out to be in prime condition...maybe I'll try trimming just for kicks.

Oh, and now you got me wondering about the spark caps....I was pretty sure they were 5k caps, but now I really don't know. Honestly, non-resistor plugs are getting rather hard to find these days, and I'm not sure why one should prefer resistor caps over resistor plugs, so as it stands, I'd actually rather have non-resistor caps. Maybe that was why I was always fouling plugs...