Home » Public Forums » GMCnet » [GMCnet] TBI + spark plugs
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| Re: [GMCnet] TBI + spark plugs [message #111696 is a reply to message #111690] |
Tue, 11 January 2011 20:16   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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No, that plug is good enough.
On Tue, Jan 11, 2011 at 5:39 PM, Gary Worobec <gtw5@earthlink.net> wrote:
> Hi,
> Is there any reason to switch from the AC Delco Rapid Fire platinum #7 spark plug to something else when the Howell system is fitted??
>
> Thanks
>
> Gary and Joanne Worobec
> 1973 GMC Glacier
> Anza, CA
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
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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] TBI + spark plugs [message #111700 is a reply to message #111690] |
Tue, 11 January 2011 20:34 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| Gary Worobec wrote on Tue, 11 January 2011 18:39 |
Hi,
Is there any reason to switch from the AC Delco Rapid Fire platinum #7 spark plug to something else when the Howell system is fitted??
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
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I have changed a lot of plugs in my life and have never ever noticed a bit of difference--not only between brands, but between new ones and old ones. Unless I have a misfire of some sort, I never replace them anymore. And when I did have a misfire, it was never due to a plug.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] TBI + spark plugs [message #111702 is a reply to message #111691] |
Tue, 11 January 2011 20:43 |
Gary Worobec
Messages: 867
Registered: May 2005
Karma: -1
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Senior Member |
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Thanks Emery,
As usual, great information.
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
----- Original Message -----
From: "Emery Stora" <emerystora@mac.com>
To: <gmclist@temp.gmcnet.org>
Sent: Tuesday, January 11, 2011 5:41 PM
Subject: Re: [GMCnet] TBI + spark plugs
>
> On Jan 11, 2011, at 6:39 PM, Gary Worobec wrote:
>
>> Hi,
>> Is there any reason to switch from the AC Delco Rapid Fire platinum #7
>> spark plug to something else when the Howell system is fitted??
>>
>> Thanks
>>
>> Gary and Joanne Worobec
>> 1973 GMC Glacier
>> Anza, CA
>
>
> Here is something that I posted last November.
>
>
> Dick Paterson doesn't recommend the #7 anymore.
>
> Here is what he recently said:
>
>> The spark plug issue was that AC DELCO changed suppliers for their
>> spark plugs and the Rapidfire #7 'platinum ' plug was still made but was
>> no longer a 'needle point' style similar to a Bosch -it now comes as a
>> regular plug configuration in the electrodes .
>> I like the features offered in the bosch style so I crossed to NGK (who
>> used to make plugs for AC Delco) .
>> I have been using NGK for several years on my oval track 355 chev
>> customers ---tune and set-ups and they are a first class plug.
>> There are 2 levels for the OLDS/GMC heat range application----first is
>> an NGK "V" groove XR5 or the premium series NGK # XR51X (7355).
>> I would check the gap and look for .038-.040----- if not avail
>> locally ----both available from Summit on line .
>> regards dick
>
> I purchased the XR51X at O'Rielly's. They ordered them and had them in
> one day. The same price as Summit but without the high handling charge.
>
> They have an electrode that looks like a needle. Very fine wire.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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List Information and Subscription Options:
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| Re: [GMCnet] TBI + spark plugs [message #111705 is a reply to message #111702] |
Tue, 11 January 2011 21:06 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Gary, if your plug is a year old, you have the good ones.
They will last a long time as the new fuels and the HEI ignition keeps
the plugs clean.
On Tue, Jan 11, 2011 at 6:43 PM, Gary Worobec <gtw5@earthlink.net> wrote:
> Thanks Emery,
>
> As usual, great information.
>
> Thanks
>
> Gary and Joanne Worobec
> 1973 GMC Glacier
> Anza, CA
>
>
> ----- Original Message -----
> From: "Emery Stora" <emerystora@mac.com>
> To: <gmclist@temp.gmcnet.org>
> Sent: Tuesday, January 11, 2011 5:41 PM
> Subject: Re: [GMCnet] TBI + spark plugs
>
>
>>
>> On Jan 11, 2011, at 6:39 PM, Gary Worobec wrote:
>>
>>> Hi,
>>> Is there any reason to switch from the AC Delco Rapid Fire platinum #7
>>> spark plug to something else when the Howell system is fitted??
>>>
>>> Thanks
>>>
>>> Gary and Joanne Worobec
>>> 1973 GMC Glacier
>>> Anza, CA
>>
>>
>> Here is something that I posted last November.
>>
>>
>> Dick Paterson doesn't recommend the #7 anymore.
>>
>> Here is what he recently said:
>>
>>> The spark plug issue was that AC DELCO changed suppliers for their
>>> spark plugs and the Rapidfire #7 'platinum ' plug was still made but was
>>> no longer a 'needle point' style similar to a Bosch -it now comes as a
>>> regular plug configuration in the electrodes .
>>> I like the features offered in the bosch style so I crossed to NGK (who
>>> used to make plugs for AC Delco) .
>>> I have been using NGK for several years on my oval track 355 chev
>>> customers ---tune and set-ups and they are a first class plug.
>>> There are 2 levels for the OLDS/GMC heat range application----first is
>>> an NGK "V" groove XR5 or the premium series NGK # XR51X (7355).
>>> I would check the gap and look for .038-.040----- if not avail
>>> locally ----both available from Summit on line .
>>> regards dick
>>
>> I purchased the XR51X at O'Rielly's. They ordered them and had them in
>> one day. The same price as Summit but without the high handling charge.
>>
>> They have an electrode that looks like a needle. Very fine wire.
>>
>> Emery Stora
>> 77 Kingsley
>> Santa Fe, NM
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription 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
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] TBI + spark plugs [message #111722 is a reply to message #111690] |
Wed, 12 January 2011 01:05 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| Gary Worobec wrote on Tue, 11 January 2011 17:39 |
Hi,
Is there any reason to switch from the AC Delco Rapid Fire platinum #7 spark plug to something else when the Howell system is fitted??
Thanks
Gary and Joanne Worobec
1973 GMC Glacier
Anza, CA
|
Gary,
I cannot think of anything Howell would do to change the way plugs behave. The mixture is going to be right on, even during warm up so the plugs should have an easy life.
I had a rough idle. Fiddled with the EBL, Spark advance, fuel, etc. Idled rough. Distributor, plugs and wires were relatively new. I began trying some things.
Went to the XR51X at O'Reilly's.
No change
Went to a new wire set
No change
Matched the pickup coil to the coil
Idled much better
Pickup wires must be lug white-green if you have a red-yellow coil. The green-white came on my rebuilt Cardone distributor, but I used my Olds distributor which is red-yellow. That is a no no.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] TBI + spark plugs [message #111727 is a reply to message #111690] |
Wed, 12 January 2011 06:03 |
g.winger
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
Karma: 0
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Senior Member |
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Really no GMC content,,,,but,,,,changed the plugs on the "Boss's" Saturn. A little late though. 110k miles. Gap on one was .083!!!!!! or 83 thousands.Really eroded. Still ran well. Not much improvement. NEVER run that large on a GMC,,,would probably blow the control module!!!!,,,,PL
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| Re: [GMCnet] TBI + spark plugs [message #111730 is a reply to message #111691] |
Wed, 12 January 2011 07:26 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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I think that what is not being said here is that Dick made this discovery on
a dyno. His roundy-round 355 SBC engines run at extremely high rpm. If
anyone would notice as change in plug performance, it would be Dick. Based
on his findings, he has found a suitable replacement that performs like the
older RF #7 plugs. Dick has always recommencded RF#7 plugs in the past
because their extreme heat range was very compatible with the engines in our
GMCs. If Dick is making a recommendation, I would follow it based on
changes he personally sees during the rigorous testing he puts his engines
through.
If you've got the old style RF#7s, use 'em. If not, follow his
recommendations. How could you possibly lose?
On Tue, Jan 11, 2011 at 6:41 PM, Emery Stora <emerystora@mac.com> wrote:
>
> On Jan 11, 2011, at 6:39 PM, Gary Worobec wrote:
>
> > Hi,
> > Is there any reason to switch from the AC Delco Rapid Fire platinum #7
> spark plug to something else when the Howell system is fitted??
> >
> > Thanks
> >
> > Gary and Joanne Worobec
> > 1973 GMC Glacier
> > Anza, CA
>
>
> Here is something that I posted last November.
>
>
> Dick Paterson doesn't recommend the #7 anymore.
>
> Here is what he recently said:
>
> > The spark plug issue was that AC DELCO changed suppliers for their
> spark plugs and the Rapidfire #7 'platinum ' plug was still made but was no
> longer a 'needle point' style similar to a Bosch -it now comes as a regular
> plug configuration in the electrodes .
> > I like the features offered in the bosch style so I crossed to NGK (who
> used to make plugs for AC Delco) .
> > I have been using NGK for several years on my oval track 355 chev
> customers ---tune and set-ups and they are a first class plug.
> > There are 2 levels for the OLDS/GMC heat range application----first is
> an NGK "V" groove XR5 or the premium series NGK # XR51X (7355).
> > I would check the gap and look for .038-.040----- if not avail locally
> ----both available from Summit on line .
> > regards dick
>
> I purchased the XR51X at O'Rielly's. They ordered them and had them in one
> day. The same price as Summit but without the high handling charge.
>
> They have an electrode that looks like a needle. Very fine wire.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
Sierra Vista, AZ
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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