Home » Public Forums » GMCnet » [GMCnet] spark plug gap
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| Re: [GMCnet] spark plug gap [message #310655 is a reply to message #310651] |
Sun, 20 November 2016 12:48   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Len,
The specs were changed as it was too wide and it caused problems on the
components.
Go .40.
On Sun, Nov 20, 2016 at 10:17 AM, Len Novak wrote:
> Gents,
>
> 1978 GMC, 403, Delco R46SZ
>
> The air cleaner says .060, but I hear that may be too wide.
>
> Suggestions?
>
> Len and Pat Novak
> 1978 GMC Kingsley
> The Beast II with dash lights that work and labels you can see!
> Fallbrook, CA new email: B52Rule@Roadrunner.Com
> http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
>
> www.bdub.net/novak/
>
>
>
>
>
> _______________________________________________
> 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] spark plug gap [message #310668 is a reply to message #310651] |
Sun, 20 November 2016 14:49 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Len Novak wrote on Sun, 20 November 2016 13:17Gents,
1978 GMC, 403, Delco R46SZ
The air cleaner says .060, but I hear that may be too wide.
Len,
That is because in tests run in the early 70's it was discovered that wide gaps and hot sparks reduced misfire and therefore HC emissions.
But the fact became clear shortly after the release of the HEI that 0.060 was too much for the hardware. OOPS
Gap is really important to over all performance, but too wide can be tough on the systems unless they are built up from OE.
Matt
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] spark plug gap [message #310669 is a reply to message #310657] |
Sun, 20 November 2016 14:45 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
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Senior Member |
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THANKS!
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of James
Hupy
Sent: Sunday, November 20, 2016 10:46 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] spark plug gap
.045"
Jim Hupy
On Nov 20, 2016 10:17 AM, "Len Novak" wrote:
> Gents,
>
> 1978 GMC, 403, Delco R46SZ
>
> The air cleaner says .060, but I hear that may be too wide.
>
> Suggestions?
>
> Len and Pat Novak
> 1978 GMC Kingsley
> The Beast II with dash lights that work and labels you can see!
> Fallbrook, CA new email: B52Rule@Roadrunner.Com
> http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
>
> www.bdub.net/novak/
>
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13443 - Release Date: 11/20/16
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13432 - Release Date: 11/18/16
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Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
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| Re: [GMCnet] spark plug gap [message #310670 is a reply to message #310655] |
Sun, 20 November 2016 14:44 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
|
Senior Member |
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THANKS!
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Jim
Kanomata
Sent: Sunday, November 20, 2016 10:49 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] spark plug gap
Len,
The specs were changed as it was too wide and it caused problems on the
components.
Go .40.
On Sun, Nov 20, 2016 at 10:17 AM, Len Novak wrote:
> Gents,
>
> 1978 GMC, 403, Delco R46SZ
>
> The air cleaner says .060, but I hear that may be too wide.
>
> Suggestions?
>
> Len and Pat Novak
> 1978 GMC Kingsley
> The Beast II with dash lights that work and labels you can see!
> Fallbrook, CA new email: B52Rule@Roadrunner.Com
> http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
>
> www.bdub.net/novak/
>
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13443 - Release Date: 11/20/16
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13432 - Release Date: 11/18/16
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
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| Re: [GMCnet] spark plug gap [message #310675 is a reply to message #310668] |
Sun, 20 November 2016 15:58 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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This could be why I've had 2 ignition modules fail in the last 4
years. My plugs are gapped at .060.
Great info, thanks!
On Sun, Nov 20, 2016 at 2:49 PM, Matt Colie wrote:
> Len Novak wrote on Sun, 20 November 2016 13:17
>> Gents,
>>
>> 1978 GMC, 403, Delco R46SZ
>>
>> The air cleaner says .060, but I hear that may be too wide.
>
> Len,
>
> That is because in tests run in the early 70's it was discovered that wide gaps and hot sparks reduced misfire and therefore HC emissions.
> But the fact became clear shortly after the release of the HEI that 0.060 was too much for the hardware. OOPS
>
> Gap is really important to over all performance, but too wide can be tough on the systems unless they are built up from OE.
>
> Matt
> --
> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> Now with both true Keyless and remote entry
> SE Michigan - Twixt A2 and Detroit
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale@gmail.com
414-484-9431
Web Site: http://ray-lisa.page.tl/
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] spark plug gap [message #310676 is a reply to message #310675] |
Sun, 20 November 2016 16:36 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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I put together a spark plug guide that is available here or it is also in the GMCMI parts interchange.
http://www.gmcmhphotos.com/photos/data/5237/Spark_Plug_Application_Guide.pdf
JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan
> On Nov 20, 2016, at 4:58 PM, Ray Erspamer wrote:
>
> This could be why I've had 2 ignition modules fail in the last 4
> years. My plugs are gapped at .060.
>
> Great info, thanks!
>
> On Sun, Nov 20, 2016 at 2:49 PM, Matt Colie wrote:
>> Len Novak wrote on Sun, 20 November 2016 13:17
>>> Gents,
>>>
>>> 1978 GMC, 403, Delco R46SZ
>>>
>>> The air cleaner says .060, but I hear that may be too wide.
>>
>> Len,
>>
>> That is because in tests run in the early 70's it was discovered that wide gaps and hot sparks reduced misfire and therefore HC emissions.
>> But the fact became clear shortly after the release of the HEI that 0.060 was too much for the hardware. OOPS
>>
>> Gap is really important to over all performance, but too wide can be tough on the systems unless they are built up from OE.
>>
>> Matt
>> --
>> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
>> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
>> Now with both true Keyless and remote entry
>> SE Michigan - Twixt A2 and Detroit
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
>
> --
> Ray Erspamer
> 78 Royale - "The Great Lakes Eagle"
> Center Kitchen TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMCRoyale@gmail.com
> 414-484-9431
> Web Site: http://ray-lisa.page.tl/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] spark plug gap [message #310683 is a reply to message #310676] |
Sun, 20 November 2016 18:17 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
|
|
Great info John, thank you.
On Sun, Nov 20, 2016 at 4:36 PM, John Wright wrote:
> I put together a spark plug guide that is available here or it is also in the GMCMI parts interchange.
>
> http://www.gmcmhphotos.com/photos/data/5237/Spark_Plug_Application_Guide.pdf
>
> JR Wright
> GMC Great Laker MHC
> GMC Eastern States Charter Member
> GMCGL Tech Editor
> GMCMI
> 78 GMC Buskirk 30’ Stretch
> 1975 GMC Avion (Under Reconstruction)
> Michigan
>
>
>
>> On Nov 20, 2016, at 4:58 PM, Ray Erspamer wrote:
>>
>> This could be why I've had 2 ignition modules fail in the last 4
>> years. My plugs are gapped at .060.
>>
>> Great info, thanks!
>>
>> On Sun, Nov 20, 2016 at 2:49 PM, Matt Colie wrote:
>>> Len Novak wrote on Sun, 20 November 2016 13:17
>>>> Gents,
>>>>
>>>> 1978 GMC, 403, Delco R46SZ
>>>>
>>>> The air cleaner says .060, but I hear that may be too wide.
>>>
>>> Len,
>>>
>>> That is because in tests run in the early 70's it was discovered that wide gaps and hot sparks reduced misfire and therefore HC emissions.
>>> But the fact became clear shortly after the release of the HEI that 0.060 was too much for the hardware. OOPS
>>>
>>> Gap is really important to over all performance, but too wide can be tough on the systems unless they are built up from OE.
>>>
>>> Matt
>>> --
>>> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
>>> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
>>> Now with both true Keyless and remote entry
>>> SE Michigan - Twixt A2 and Detroit
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>>
>>
>> --
>> Ray Erspamer
>> 78 Royale - "The Great Lakes Eagle"
>> Center Kitchen TZE368V101144
>> Wauwatosa, Wisconsin 53226
>> Email: 78GMCRoyale@gmail.com
>> 414-484-9431
>> Web Site: http://ray-lisa.page.tl/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
--
Ray Erspamer
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMCRoyale@gmail.com
414-484-9431
Web Site: http://ray-lisa.page.tl/
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] spark plug gap [message #310685 is a reply to message #310676] |
Sun, 20 November 2016 19:05 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
|
Senior Member |
|
|
Thanks!
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of John Wright
Sent: Sunday, November 20, 2016 2:36 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] spark plug gap
I put together a spark plug guide that is available here or it is also in the GMCMI parts interchange.
http://www.gmcmhphotos.com/photos/data/5237/Spark_Plug_Application_Guide.pdf
JR Wright
GMC Great Laker MHC
GMC Eastern States Charter Member
GMCGL Tech Editor
GMCMI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan
> On Nov 20, 2016, at 4:58 PM, Ray Erspamer wrote:
>
> This could be why I've had 2 ignition modules fail in the last 4
> years. My plugs are gapped at .060.
>
> Great info, thanks!
>
> On Sun, Nov 20, 2016 at 2:49 PM, Matt Colie wrote:
>> Len Novak wrote on Sun, 20 November 2016 13:17
>>> Gents,
>>>
>>> 1978 GMC, 403, Delco R46SZ
>>>
>>> The air cleaner says .060, but I hear that may be too wide.
>>
>> Len,
>>
>> That is because in tests run in the early 70's it was discovered that wide gaps and hot sparks reduced misfire and therefore HC emissions.
>> But the fact became clear shortly after the release of the HEI that
>> 0.060 was too much for the hardware. OOPS
>>
>> Gap is really important to over all performance, but too wide can be tough on the systems unless they are built up from OE.
>>
>> Matt
>> --
>> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
>> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control
>> Arms Now with both true Keyless and remote entry SE Michigan - Twixt
>> A2 and Detroit
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
>
> --
> Ray Erspamer
> 78 Royale - "The Great Lakes Eagle"
> Center Kitchen TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMCRoyale@gmail.com
> 414-484-9431
> Web Site: http://ray-lisa.page.tl/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13443 - Release Date: 11/20/16
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13432 - Release Date: 11/18/16
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
|
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| Re: [GMCnet] spark plug gap [message #310696 is a reply to message #310655] |
Mon, 21 November 2016 01:07 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
A better number would be .040". I know that is what Jim meant.
jimk wrote on Sun, 20 November 2016 12:48Len,
The specs were changed as it was too wide and it caused problems on the
components.
Go .40.
On Sun, Nov 20, 2016 at 10:17 AM, Len Novak wrote:
> Gents,
>
> 1978 GMC, 403, Delco R46SZ
>
> The air cleaner says .060, but I hear that may be too wide.
>
> Suggestions?
>
> Len and Pat Novak
> 1978 GMC Kingsley
> The Beast II with dash lights that work and labels you can see!
> Fallbrook, CA new email: B52Rule@Roadrunner.Com
> http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
>
> www.bdub.net/novak/
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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