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05-19-2021, 10:26 AM
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#1
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Member
Winnebago Owners Club Nor'easters Club Workhorse Chassis Owner
Join Date: Jun 2007
Location: Mantua,NJ
Posts: 50
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Spark plug gap
I have a 2004 workhorse chassis RV. I saw a post on there about spark plug gap. It was stated that you should use a different gap then Workhorse states and I can not find the posting at all. it was posted Nov 2020. Can someone help? I have a 5.7L gas
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2004 Winnebago Chieftain
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05-19-2021, 03:25 PM
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#2
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Senior Member
Join Date: Oct 2002
Location: Madison, MS
Posts: 10,521
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Quote:
Originally Posted by PDI
I have a 2004 workhorse chassis RV. I saw a post on there about spark plug gap. It was stated that you should use a different gap then Workhorse states and I can not find the posting at all. it was posted Nov 2020. Can someone help? I have a 5.7L gas
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I would be very suprised to learn you have a small V-8 powering your Chieftain. ASSUMING you have a W-22 series chassis, you have an 8.1L V-8.
[Mod Edit]
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05-19-2021, 05:36 PM
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#3
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2006
Location: Northwestern Montana
Posts: 3,512
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I agree with Ed, your 2004 Chieftan should be equipped with an 8.1 engine. The revised spark plug gap you mentioned is .045. (45/1000).
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Dieselclacker
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05-20-2021, 04:43 AM
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#4
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Senior Member
Join Date: Apr 2010
Location: Portage, MI
Posts: 466
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Jon Brazel posted this in March:
We’ve done a lot of dyno testing and with our Magnum wires, there was absolutely no difference in power between .045 gapped plugs and factory .060 gapped plugs. Removing the resistance in the ignition wire has many benefits! Back when we use to run Taylor wires, the .045 gap worked well but with the Iridium tips being a bit more fragile I recommend leaving them alone at .060.
__________________
Jon Brazel
Ultra RV Products / Brazel's RV Performance
__________________
2011 Newmar Canyon Star 3411; Workhorse W22; 8.1L; Allison 6-speed
2013 Honda CRV
Portage, MI
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05-20-2021, 10:01 AM
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#5
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Member
Winnebago Owners Club Nor'easters Club Workhorse Chassis Owner
Join Date: Jun 2007
Location: Mantua,NJ
Posts: 50
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so sorry, I do have a 8.1
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2004 Winnebago Chieftain
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05-20-2021, 10:02 AM
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#6
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Member
Winnebago Owners Club Nor'easters Club Workhorse Chassis Owner
Join Date: Jun 2007
Location: Mantua,NJ
Posts: 50
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yes, I do have a 8.1. brain fart on my part
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2004 Winnebago Chieftain
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05-20-2021, 10:04 AM
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#7
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Member
Winnebago Owners Club Nor'easters Club Workhorse Chassis Owner
Join Date: Jun 2007
Location: Mantua,NJ
Posts: 50
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you are all right. I have a 8.1, thanks for correcting my Bad
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2004 Winnebago Chieftain
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05-20-2021, 05:35 PM
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#8
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Senior Member
Join Date: Oct 2005
Posts: 376
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Quote:
Originally Posted by RetiredBob
Jon Brazel posted this in March:
We’ve done a lot of dyno testing and with our Magnum wires, there was absolutely no difference in power between .045 gapped plugs and factory .060 gapped plugs. Removing the resistance in the ignition wire has many benefits! Back when we use to run Taylor wires, the .045 gap worked well but with the Iridium tips being a bit more fragile I recommend leaving them alone at .060.
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Jon Brazel
Ultra RV Products / Brazel's RV Performance
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I changed wires and plugs, about a month ago, gapped at 45. Done a 400 mile trip and it run great. Do I need to regap to 60, I used the magnum wires.
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H.B. & Deb. Harlie, (the baby dane) Molly(spoiled Shih Tzu) , 06 Pace Arrow ,36D full slide , electric jacks , Blue Ox Aventa II , 97 Harley Heritage.
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05-20-2021, 10:31 PM
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#9
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Senior Member
Join Date: Mar 2019
Location: Arizona
Posts: 2,205
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Quote:
Originally Posted by Blaster
I changed wires and plugs, about a month ago, gapped at 45. Done a 400 mile trip and it run great. Do I need to regap to 60, I used the magnum wires.
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Leave it where it is if you've already done it. I think the risk is in damaging the fragile tips while performing the gap change.
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2004 National Dolphin LX 6320, W-22, 8.1, Allison 1000, Front/rear "Trac" Bars & Anti-sway Bars, Sumo Springs, Roadmaster Reflex Steering Stabilizer, 2005 PT Cruiser Toad
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05-21-2021, 04:48 AM
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#10
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Senior Member
Join Date: Apr 2010
Location: Portage, MI
Posts: 466
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Just to add to the discussion, I purchased plugs and Magnum wires from Brazels and left the gap at the factory setting of .060. Engine has run perfectly for 3,000 miles.
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2011 Newmar Canyon Star 3411; Workhorse W22; 8.1L; Allison 6-speed
2013 Honda CRV
Portage, MI
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05-21-2021, 04:57 PM
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#11
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Senior Member
Newmar Owners Club Tiffin Owners Club Workhorse Chassis Owner
Join Date: Jan 2015
Location: Byhalia, MS
Posts: 3,367
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I replaced my plugs just before I saw this thread and set them at .045". I'm leaving them that way! That was in fact the GM recommendation.
jt
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2019 Tiffin Phaeton 40IH
2005 Newmar Kountry Star Gas (Sold)
2022 JL Wrangler 4xe or 2017 Harley Ultra in tow
JT, Em & the boys, Kong & Baxter (rescued grey tabbies)
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06-12-2021, 07:02 PM
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#12
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Senior Member
Join Date: Apr 2017
Location: Beverslee Hills, Calif
Posts: 193
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how can adjusting the gap mess up the tip ? my cheap gap tool does not come close if USED CORRECTLY.
i surely can change the gap on ANY plug w/o touching the tip, can not any competent person do the same - put on glasses so you can see the details if need be ???1
IMO, a silly notion NOT to change gap if needed, what if NOT set correctly from factory somehow ?
please explain ?
Quote:
Originally Posted by RetiredBob
Jon Brazel posted this in March:
We’ve done a lot of dyno testing and with our Magnum wires, there was absolutely no difference in power between .045 gapped plugs and factory .060 gapped plugs. Removing the resistance in the ignition wire has many benefits! Back when we use to run Taylor wires, the .045 gap worked well but with the Iridium tips being a bit more fragile I recommend leaving them alone at .060.
__________________
Jon Brazel
Ultra RV Products / Brazel's RV Performance
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06-13-2021, 01:34 AM
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#13
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Registered User
Join Date: Aug 2016
Location: Seattle,WA/HB,CA./Fujieda-Japan
Posts: 849
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The vast majority of plugs already come pre gapped according to manufacture specs for said vehicle.
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06-13-2021, 05:39 AM
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#14
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Senior Member
Join Date: Mar 2019
Location: Arizona
Posts: 2,205
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Quote:
Originally Posted by SmilingSam
how can adjusting the gap mess up the tip ? my cheap gap tool does not come close if USED CORRECTLY.
i surely can change the gap on ANY plug w/o touching the tip, can not any competent person do the same - put on glasses so you can see the details if need be ???1
IMO, a silly notion NOT to change gap if needed, what if NOT set correctly from factory somehow ?
please explain ?
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It's not needed. Did you not read the part about there being no difference in power?
__________________
2004 National Dolphin LX 6320, W-22, 8.1, Allison 1000, Front/rear "Trac" Bars & Anti-sway Bars, Sumo Springs, Roadmaster Reflex Steering Stabilizer, 2005 PT Cruiser Toad
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