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Olli
Soviet-Finn Photoshoper
Joined: 25 May 2007
Posts: 2146
Location: Soviet-Finland
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 Posted: Tue Oct 14, 2008 10:52 am Post subject: |
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Yep, I havent hear many bad stories about 2cv coils, but harley coils much
more. And if you (or your friend) have many junk, 2cv coils are mostly free
for you and those (taiwan made) harley coils are quite expensive,
because harley text on it...
I would not change.
-Olli
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www.ollierkkila.com |
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4x4 SuperFinn
Snailer
Joined: 18 Jul 2008
Posts: 47
Location: UK
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| Posted: Fri Oct 17, 2008 10:31 am Post subject: |
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| Malte wrote: | would be interesting to hear something about reliability of those coils and if it's useful.
don't want to blow off my money. :) |
If you look at the queue for any world meeting there are always 2CV'S that after a while idling just do not want to start. In virtually all cases a change of coil gets them running again. I've seen this over and over again.
Similarly on the 4x4 2CVs after a lot of 1st & 2nd gear work off road the coil can get hot and if the car then stalls it can be a problem to get it going again. However with the Harley coil fitted this was not a problem.
From my own experience my 2CV has started better in the cold and damp since fitting the Harley coil and in the environment that my car runs (mud and water) this is rather important.
Reliability wise I've had the yellow coil fitted for over 5 year now with no problems so all in all for me it's been worth the investment... |
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backfire
Dropped
Joined: 14 Nov 2007
Posts: 346
Location: NL, 's-Hertogenbosch
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| Posted: Fri Oct 17, 2008 1:57 pm Post subject: |
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I don't understand why call these harley coils? they are not, just regular twin lead coils, used on many motorbikes, not only Harley. Older Japanes 4 cylinder bikes are regulary fitted with dual lead coils.
They come in different variations, 3 and 5 ohm, so you can buy them also to be used with your regular system.
Ok maybe the harley scene uses a lot more after market coils, but I do not believe that original coils are so bad, but most harleys are tuned somewhat and of course the looks for Harley is also an item.
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2CV, with Visa turbo charged |
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4x4 SuperFinn
Snailer
Joined: 18 Jul 2008
Posts: 47
Location: UK
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| Posted: Fri Oct 17, 2008 3:01 pm Post subject: |
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I've always known of them as Harley hence me referring to them as such.
And yes the original coils are not bad but some of the later ones had quite a range of resitsance variation which caused issues. The "yellow motorbike" ones did not.
It worked for me and I'm happy with the results, but if you have coil issues then perhaps this type is worth considering... |
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backfire
Dropped
Joined: 14 Nov 2007
Posts: 346
Location: NL, 's-Hertogenbosch
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| Posted: Fri Oct 17, 2008 4:27 pm Post subject: |
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Ah now I understand the confussion, the term "bad" appeared when using coils with wrong resistance (or instable) in conjunction with electronic ignition systems. Electronic ignition systems rely on the right resistance, coils can damage or the entire ignition system will fail.
So just look for a new dual lead coils from eg Dyna, wuth the right resistance for the system. 3 Ohm for electronic and 5 Ohm for contact breaker.
Or try flamethrower coils  but I think you can only use them with electronic ignition. Sometime resistance is lower eg 2.8 / 2.5 Ohm, nut sure exactly, but I think you get the idea.
for the techies enjoy:
http://www.chopperscycle.com/page/VTS/CTGY/50-291
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2CV, with Visa turbo charged |
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Pietro
Snailer
Joined: 17 Aug 2007
Posts: 13
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| Posted: Sun Oct 26, 2008 1:26 pm Post subject: Re: Exhaust tuning and timing results (or +1.5hp the easy wa |
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| 4x4 SuperFinn wrote: |
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Nice graph!
Sceptics will argue that the forced air, taken from the front of the car, is cooler than the air taken under the bonnet.
Was the bonnet open during the measurements or where there any corrections made for air temperature at the carb inlet?
.
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dyanut
Dropped
Joined: 05 Aug 2007
Posts: 177
Location: North Yorkshire
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| Posted: Sun Oct 26, 2008 10:34 pm Post subject: |
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Hmmm,
I was wondering why that run with a standard exhaust and intake peaked at just over 5,000 rpm, when it should be around 5,750 rpm?
Then I noticed that not only was the mixture richened to suit the blown induction but that the timing was also adjusted (presumably it was advanced slightly?). 
Ken. |
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4x4 SuperFinn
Snailer
Joined: 18 Jul 2008
Posts: 47
Location: UK
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| Posted: Mon Oct 27, 2008 11:56 am Post subject: |
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| dyanut wrote: | Hmmm,
I was wondering why that run with a standard exhaust and intake peaked at just over 5,000 rpm, when it should be around 5,750 rpm?
Then I noticed that not only was the mixture richened to suit the blown induction but that the timing was also adjusted (presumably it was advanced slightly?).
Ken. |
If you look at the plot times you'll see that we did the optimising of the ignition and fuel at 13.28. 15 minutes later we ran again using the the same ignition settings but with the forced air induction pipe off so the 1.5HP did come from the blown induction. |
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4x4 SuperFinn
Snailer
Joined: 18 Jul 2008
Posts: 47
Location: UK
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| Posted: Mon Oct 27, 2008 12:00 pm Post subject: Re: Exhaust tuning and timing results (or +1.5hp the easy wa |
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| Pietro wrote: | | 4x4 SuperFinn wrote: |
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Nice graph!
Sceptics will argue that the forced air, taken from the front of the car, is cooler than the air taken under the bonnet.
Was the bonnet open during the measurements or where there any corrections made for air temperature at the carb inlet?
.
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The testing was done with the bonet off the car and the ambient air temperature was kept constant as the dyno was in an air conditioned environment. Therefore under bonnet air temperature would not have been an issue. |
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