| [GMCnet] Onan time again [message #201389] |
Tue, 12 March 2013 10:25  |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Springtime has me thinking about my coach again and my stalled Onan ignition project. I had put some thought into making an adjustable mounting plate for the Pertronix ignition, but life got in the way. Has anyone else taken the baton and run with it?
I see Jim K has an MSD ignition module on his website that looks pretty complete - has anyone taken a look at this?
<http://appliedgmc.com/prod.itml/icOid/1381>
It looks like it would certainly improve the weak spark these old trolls have lived with for so long.
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Onan time again [message #201391 is a reply to message #201389] |
Tue, 12 March 2013 10:30  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Larry,
I think if you'll just install the Pertronix IAW the instructions in my,
and other, photo albums you'll be so happy with the result that you'll
wonder why you ever worried about making the mount adjustable.
JMHO,
Ken H.
On Tue, Mar 12, 2013 at 11:25 AM, Larry Davick <ljdavick@comcast.net> wrote:
> Springtime has me thinking about my coach again and my stalled Onan
> ignition project. I had put some thought into making an adjustable
> mounting plate for the Pertronix ignition, but life got in the way. Has
> anyone else taken the baton and run with it?
...
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Onan time again [message #201405 is a reply to message #201391] |
Tue, 12 March 2013 12:32 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We have noticed that with the MSD unit it is simple to install and the fact
that the unit fires twice makes it run very well. MSD units are very
popular for that feature.I think after the first, it fores 20 degree later
in case the first misfires.
You can also open up the plug gap to .30 instead of the standard 20.
On Tue, Mar 12, 2013 at 8:30 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> Larry,
>
> I think if you'll just install the Pertronix IAW the instructions in my,
> and other, photo albums you'll be so happy with the result that you'll
> wonder why you ever worried about making the mount adjustable.
>
> JMHO,
>
>
> Ken H.
>
> On Tue, Mar 12, 2013 at 11:25 AM, Larry Davick <ljdavick@comcast.net>
> wrote:
>
> > Springtime has me thinking about my coach again and my stalled Onan
> > ignition project. I had put some thought into making an adjustable
> > mounting plate for the Pertronix ignition, but life got in the way. Has
> > anyone else taken the baton and run with it?
>
> ...
> >
> _______________________________________________
> GMCnet mailing list
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Onan time again [message #201419 is a reply to message #201405] |
Tue, 12 March 2013 15:41 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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VEK2543 - Velleman Electronic Transistor Ignition Kit $25.95 for those of you who are handy with a soldering iron. This is a point triggered CD ignition system that will work on Mr. Onan. I used one in my first coach. Makes a nice hot spark, you can open up the plug gap and really take advantage of the hot spark.
The downside of using the Onan's point as a trigger, it is not very accurate, That is the main reason Onan's engineers had to change both the dwell and plug gap to make a reliable ignition.
IF I still had an Onan, I would follow Ken's lead and go with the Pertronix system.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
[Updated on: Tue, 12 March 2013 15:41] Report message to a moderator |
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| Re: [GMCnet] Onan time again [message #201422 is a reply to message #201420] |
Tue, 12 March 2013 16:33 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| A Hamilto wrote on Tue, 12 March 2013 16:06 |
| tphipps wrote on Tue, 12 March 2013 15:41 |
...The downside of using the Onan's point as a trigger, it is not very accurate, That is the main reason Onan's engineers had to change both the dwell and plug gap to make a reliable ignition.
IF I still had an Onan, I would follow Ken's lead and go with the Pertronix system.
Tom, MS II
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Does the accuracy of the spark trigger affect fuel consumption measurably?
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Yes
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Onan time again [message #201487 is a reply to message #201427] |
Wed, 13 March 2013 01:27 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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While probably a neat idea, I really question the need for this adjustable mount. Once the ignition is mounted there is nothing to wear or stretch or move. It should stay in adjustment forever with no additional attention required.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Onan time again [message #201516 is a reply to message #201487] |
Wed, 13 March 2013 08:45 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
You are correct, however, what I discovered was that if you mount it to the inner fan housing and then remove the inner fan housing
and reinstall it the pickup doesn't wind up in the same place.
Next time I see you I'll show you what I've come up with. All I need is an Onan in Sydney to work it out.
Regards,
Rob M.
-----Original Message-----
From: Ken Burton
While probably a neat idea, I really question the need for this adjustable mount. Once the ignition is mounted there is nothing to
wear or stretch or move. It should stay in adjustment forever with no additional attention required.
--
Ken
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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