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| [GMCnet] pertronix numbers? [message #116388] |
Thu, 24 February 2011 15:36  |
KB
Messages: 1262
Registered: September 2009
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The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
as possibilities. What is the difference in these, and what makes them good or bad
for the old green monster?
thanks,
Karen
1973 23'
1975 26'
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] pertronix numbers? [message #116395 is a reply to message #116388] |
Thu, 24 February 2011 17:00  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Karen,
The 1181 is the one used on most GM V-8's before HEI. It's the one Lawrence
Gaskins originally used when he developed the mod. I consulted with
Pertronix and they thought the one for VW's (1847V) might work better
because of its configuration -- but it didn't. The 1281 (for Fords), or any
other 12 VDC negative ground Ignitor should work; they're all the same
electronically. The 1181 seems to be as good as they've got, and the
magnets are easy to extract from the disc they're provided in. It's
available from Amazon for about $63.
Ken H.
On Thu, Feb 24, 2011 at 4:36 PM, KB <kab7@sonic.net> wrote:
> The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
> But what part number is "best"? I've seen 1847V, 1281, and 1181 all
> mentioned
> as possibilities. What is the difference in these, and what makes them
> good or bad
> for the old green monster?
>
>
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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] pertronix numbers? [message #116418 is a reply to message #116388] |
Thu, 24 February 2011 20:08 |
GMCNUSA
Messages: 283
Registered: August 2006
Location: Indianapolis, IN
Karma: 0
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| KB wrote on Thu, 24 February 2011 16:36 |
The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
as possibilities. What is the difference in these, and what makes them good or bad
for the old green monster?
thanks,
Karen
1973 23'
1975 26'
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I did my Onan using the 1181 just this past summer it runs perfect. With a little preplanning I was able to use the pertronix factory leads to reach the coil. I believe different kits have different wire lengths on the module. I would use 1101 again. JWID
Larry Dilk
Indianapolis, IN
76 Eleganza II
Patterson 455,Turbo City TBI,
Just LOVE It!
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| Re: [GMCnet] pertronix numbers? [message #116419 is a reply to message #116418] |
Thu, 24 February 2011 20:10 |
GMCNUSA
Messages: 283
Registered: August 2006
Location: Indianapolis, IN
Karma: 0
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| GMCNUSA wrote on Thu, 24 February 2011 21:08 |
| KB wrote on Thu, 24 February 2011 16:36 |
The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
as possibilities. What is the difference in these, and what makes them good or bad
for the old green monster?
thanks,
Karen
1973 23'
1975 26'
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I did my Onan using the 1181 just this past summer it runs perfect. With a little preplanning I was able to use the pertronix factory leads to reach the coil. I believe different kits have different wire lengths on the module. I would use 1101 again. JWID
make that 1101 a 1181 kit.
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Larry Dilk
Indianapolis, IN
76 Eleganza II
Patterson 455,Turbo City TBI,
Just LOVE It!
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| Re: [GMCnet] pertronix numbers? [message #116423 is a reply to message #116388] |
Thu, 24 February 2011 20:44 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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| KB wrote on Thu, 24 February 2011 13:36 |
The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
as possibilities. What is the difference in these, and what makes them good or bad
for the old green monster?
|
The main difference in the different applications is the mounting brackets. As _most_ of us remove and discard the bracket, this doesn't matter. (There is one method that uses this bracket.)
There is a slight difference in how the module mounts to the bracket. (I call this a difference the "style" of the module.) Most of the modules have ears on each side that rivet to the bracket. The module used on the 1181 (GM application) has a single ear on the back, that seems easier to mount to most home-made brackets.
Other than different voltages and what type of ground, the modules are electrically the same... as long as they are the same "type." The different "types" (Pertronix, Pertronix II and Pertronix LS) are each are different electronically.
For example: A 12 volt negative ground Pertronix II module for a Ford would be the same as a 12 volt negative ground Pertronix II for a GM or even Jaguar.
The electronic differences are that the Pertronix II has burn out protection that the Pertronix (I) does not. The "LS" does not use a magnet to trigger, it senses the points of the lobes. I suspect a "LS" could still be used with a chunk from a nail (or something)... but why? The other two types are cheaper.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: [GMCnet] pertronix numbers? [message #116501 is a reply to message #116423] |
Fri, 25 February 2011 11:47 |
KRDietz
Messages: 133
Registered: July 2010
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Seems like I will now have TWO sets of 1181. Finally got inspired to
get at this by Mike's pictures and thanks to some less-than-attentive
online purchasing I'll have a spare kit.
Rather than sending one back to the vendor I'd be happy to send it to
one of you who wants to perform this mod. Cost me $63 with free
shipping. I'll send it to someone for $63 with free shipping. Beats
sending it back to the vendor.
Offline at kelvin@datsuns.com if anyone is interested.
Later
Kelvin "The Doofus" Dietz
'73 23' in Eugene, OR
>> The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
>> But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
>> as possibilities. What is the difference in these, and what makes them good or bad
>> for the old green monster?
>
> The main difference in the different applications is the mounting brackets. As _most_ of us remove and discard the bracket, this doesn't matter. (There is one method that uses this bracket.)
>
> There is a slight difference in how the module mounts to the bracket. (I call this a difference the "style" of the module.) Most of the modules have ears on each side that rivet to the bracket. The module used on the 1181 (GM application) has a single ear on the back, that seems easier to mount to most home-made brackets.
>
> Other than different voltages and what type of ground, the modules are electrically the same... as long as they are the same "type." The different "types" (Pertronix, Pertronix II and Pertronix LS) are each are different electronically.
>
> For example: A 12 volt negative ground Pertronix II module for a Ford would be the same as a 12 volt negative ground Pertronix II for a GM or even Jaguar.
>
> The electronic differences are that the Pertronix II has burn out protection that the Pertronix (I) does not. The "LS" does not use a magnet to trigger, it senses the points of the lobes. I suspect a "LS" could still be used with a chunk from a nail (or something)... but why? The other two types are cheaper.
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| Re: [GMCnet] pertronix numbers? [message #116503 is a reply to message #116501] |
Fri, 25 February 2011 11:58 |
KRDietz
Messages: 133
Registered: July 2010
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Sold. Thanks guys...
Makes my screwup a little less annoying...
> Seems like I will now have TWO sets of 1181. Finally got inspired to
> get at this by Mike's pictures and thanks to some less-than-attentive
> online purchasing I'll have a spare kit.
>
> Rather than sending one back to the vendor I'd be happy to send it to
> one of you who wants to perform this mod. Cost me $63 with free
> shipping. I'll send it to someone for $63 with free shipping. Beats
> sending it back to the vendor.
>
> Offline at kelvin@datsuns.com if anyone is interested.
>
> Later
> Kelvin "The Doofus" Dietz
> '73 23' in Eugene, OR
>
>>> The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
>>> But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned
>>> as possibilities. What is the difference in these, and what makes them good or bad
>>> for the old green monster?
>> The main difference in the different applications is the mounting brackets. As _most_ of us remove and discard the bracket, this doesn't matter. (There is one method that uses this bracket.)
>>
>> There is a slight difference in how the module mounts to the bracket. (I call this a difference the "style" of the module.) Most of the modules have ears on each side that rivet to the bracket. The module used on the 1181 (GM application) has a single ear on the back, that seems easier to mount to most home-made brackets.
>>
>> Other than different voltages and what type of ground, the modules are electrically the same... as long as they are the same "type." The different "types" (Pertronix, Pertronix II and Pertronix LS) are each are different electronically.
>>
>> For example: A 12 volt negative ground Pertronix II module for a Ford would be the same as a 12 volt negative ground Pertronix II for a GM or even Jaguar.
>>
>> The electronic differences are that the Pertronix II has burn out protection that the Pertronix (I) does not. The "LS" does not use a magnet to trigger, it senses the points of the lobes. I suspect a "LS" could still be used with a chunk from a nail (or something)... but why? The other two types are cheaper.
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| Re: [GMCnet] pertronix numbers? [message #116504 is a reply to message #116388] |
Fri, 25 February 2011 12:18 |
KB
Messages: 1262
Registered: September 2009
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Senior Member |
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> The main difference in the different applications is the mounting brackets. As _most_ of us remove and discard the bracket, this doesn't matter. (There is one method that uses this bracket.)
>
> There is a slight difference in how the module mounts to the bracket. (I call this a difference the "style" of the module.) Most of the modules have ears on each side that rivet to the bracket. The module used on the 1181 (GM application) has a single ear on the back, that seems easier to mount to most home-made brackets.
>
> Other than different voltages and what type of ground, the modules are electrically the same... as long as they are the same "type." The different "types" (Pertronix, Pertronix II and Pertronix LS) are each are different electronically.
>
> For example: A 12 volt negative ground Pertronix II module for a Ford would be the same as a 12 volt negative ground Pertronix II for a GM or even Jaguar.
>
> The electronic differences are that the Pertronix II has burn out protection that the Pertronix (I) does not. The "LS" does not use a magnet to trigger, it senses the points of the lobes. I suspect a "LS" could still be used with a chunk from a nail (or something)... but why? The other two types are cheaper.
> --
Thanks! Looks like the Pertronix II part numbers are the Pertronix number preceded by a "9".
Eg, Pertronix 1181 translates to 91181 in Pertronix II.
The price difference is about 50% or so -- eg $65-ish vs $100-ish.
Is it worth it? Dunno.
Looking at the pictures, it appears the 91281 would be good for our purpose.
Nice long wires, etc.
thanks,
Karen
1973 23'
1975 26'
_______________________________________________
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] pertronix numbers? [message #116553 is a reply to message #116388] |
Fri, 25 February 2011 18:01 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| KB wrote on Thu, 24 February 2011 16:36 |
The Pertronix ignition upgrade to our Onan sounds like a good thing to do.
But what part number is "best"? I've seen 1847V, 1281, and 1181 all mentioned as possibilities. What is the difference in these, and what makes them good or bad for the old green monster?
thanks,
Karen
|
Karen,
I don't even remember what part number I used, but it was for some obscure engine and therefore little competition on E-bay (read - cheap).
Work it like this. . . .
Look on E-bay and see what they have.
If they do not supply the Pertronix part number, only the application-
Then go to <http://www.pertronix.com/catalogs/default.aspx>, download the catalog and get a part number.
Then to <http://www.pertronix.com/about/images/default.aspx> and look at the pictures (they are real good if you click on them) and decide if you can mount it next to and Onan flywheel.
I drilled out the two rivets that held the unit to the dummy breaker plate. and milled a stand-off block out of a small piece of aluminum and then used a couple of 4-40 screws with nylock nuts to mount it.
I didn't take any pictures - sorry.
The black round piece that comes with every kit (unless it is an LS model - you don't want) has the magnets in it. If you smash it in a iron saw table the little ..... magnets will stick on the table and not get lost. (Does that sound like a BTDT??)
I looked at someones 1181 installation in an Onan and did not like the amount of bracket and sensor that had to be out in the airstream. I like Rob's mount (maybe better than mine). Remember that the sensor mounting tab has to ground the sensor.
A good number of the sensors are identical except for the dummy breaker plate that they are riveted to when you buy them.
You are correct about the IngitorII number. I can't believe is would do an Onan any benefit.
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] pertronix numbers? [message #116598 is a reply to message #116504] |
Fri, 25 February 2011 22:58 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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The unit that cost less will cook if ignition is left on.
The newer one can be left with the ignition on.
In the case of the Onan, it should not be a concern.
On Fri, Feb 25, 2011 at 10:18 AM, KB <kab7@sonic.net> wrote:
>> The main difference in the different applications is the mounting brackets. As _most_ of us remove and discard the bracket, this doesn't matter. (There is one method that uses this bracket.)
>>
>> There is a slight difference in how the module mounts to the bracket. (I call this a difference the "style" of the module.) Most of the modules have ears on each side that rivet to the bracket. The module used on the 1181 (GM application) has a single ear on the back, that seems easier to mount to most home-made brackets.
>>
>> Other than different voltages and what type of ground, the modules are electrically the same... as long as they are the same "type." The different "types" (Pertronix, Pertronix II and Pertronix LS) are each are different electronically.
>>
>> For example: A 12 volt negative ground Pertronix II module for a Ford would be the same as a 12 volt negative ground Pertronix II for a GM or even Jaguar.
>>
>> The electronic differences are that the Pertronix II has burn out protection that the Pertronix (I) does not. The "LS" does not use a magnet to trigger, it senses the points of the lobes. I suspect a "LS" could still be used with a chunk from a nail (or something)... but why? The other two types are cheaper.
>> --
>
> Thanks! Looks like the Pertronix II part numbers are the Pertronix number preceded by a "9".
> Eg, Pertronix 1181 translates to 91181 in Pertronix II.
> The price difference is about 50% or so -- eg $65-ish vs $100-ish.
> Is it worth it? Dunno.
>
> Looking at the pictures, it appears the 91281 would be good for our purpose.
> Nice long wires, etc.
>
> thanks,
> Karen
> 1973 23'
> 1975 26'
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
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jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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