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Home » Public Forums » GMCnet » Re: [GMCnet] The impact of extra weight on GMC handling
Re: [GMCnet] The impact of extra weight on GMC handling [message #327176] Sat, 16 December 2017 11:39 Go to next message
BobDunahugh is currently offline  BobDunahugh   United States
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I pull a 9,000 lbs enclosed trailer with a car/shop behind a 12,000 lbs 403 powered Royale. Thus a 21,000lbs GVW. Weight on the GMC from that trailer is in the 1,200 lbs range. Granted. This extra weight is carried low. But 5 feet behind the far back wheels. Pulls, and handles fine at 75MPH. There are no extra sway bars, or any tracking improvements. But not fast from a stop light. What is a must to carry these extreme weights. Is a GMC that's has a very good original suspension system under it. Bob Dunahugh 78 Royale
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Re: [GMCnet] The impact of extra weight on GMC handling [message #327198 is a reply to message #327176] Sun, 17 December 2017 03:05 Go to previous messageGo to next message
johnd01 is currently offline  johnd01   United States
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Re: I pull a 9,000 lbs enclosed trailer with a car/shop behind a 12,000 lbs 403 powered Royale
Are you saying the trailer contains a car/shop?
What brakes does the trailer have?
Does the trailer effect your stopping distance?
What is your final drive ratio?


Johnd01 John Phillips Avion A2600 TZE064V101164 Rancho Cordova, CA (Sacramento)
Re: [GMCnet] The impact of extra weight on GMC handling [message #327200 is a reply to message #327176] Sun, 17 December 2017 04:17 Go to previous messageGo to next message
kerry pinkerton is currently offline  kerry pinkerton   United States
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BobDunahugh wrote on Sat, 16 December 2017 11:39
... Thus a 21,000lbs GVW. Weight on the GMC from that trailer is in the 1,200 lbs range....


Bob, you're not suggesting you have 1200 lbs tongue weight are you?


Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
Re: [GMCnet] The impact of extra weight on GMC handling [message #327208 is a reply to message #327176] Sun, 17 December 2017 12:26 Go to previous messageGo to next message
BobDunahugh is currently offline  BobDunahugh   United States
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Generally my enclosed trailer with Yenko, parts/shop comes in at 9,000 lbs. Then sometimes it gets even higher depending on the road race track that I'm going too. May need parts along. I've twisted off the ends of the crankshaft, trans input and output shafts, axles, and yokes. So to not have the trailer not get to swaying from side to side. You need to have at least 10% of the trailer weight as your tongue weight. Been using the GMC to do this since 2003 from coast to coast with no issues. But yes. I do inspect the GMC frame often. The Royale's are the heaviest of the GMC's. And our 78 has the 403 with the 3:70 FD. It has no engine cooling enhancements added. As to brakes. The GMC used stock 4 drums in the rear. The trailer has its own brakes. Again. With no stopping issues. But I did just put disc on the front rear axles just for added braking if needed. I have no true trac, wheel spacer, or reaction arms. I simply put our GMC back to it's original specs. And maintain that. That's what works for me. You need to do what puts you in YOUR Comfort Zone. Bob Dunahugh 78 Royale Iowa Member GMCMI


________________________________
From: Bob Dunahugh
Sent: Saturday, December 16, 2017 11:39 AM
To: gmclist@list.gmcnet.org
Subject: RE: The impact of extra weight on GMC handling


I pull a 9,000 lbs enclosed trailer with a car/shop behind a 12,000 lbs 403 powered Royale. Thus a 21,000lbs GVW. Weight on the GMC from that trailer is in the 1,200 lbs range. Granted. This extra weight is carried low. But 5 feet behind the far back wheels. Pulls, and handles fine at 75MPH. There are no extra sway bars, or any tracking improvements. But not fast from a stop light. What is a must to carry these extreme weights. Is a GMC that's has a very good original suspension system under it. Bob Dunahugh 78 Royale
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Re: [GMCnet] The impact of extra weight on GMC handling [message #327238 is a reply to message #327208] Sun, 17 December 2017 22:06 Go to previous message
jimk is currently offline  jimk   United States
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Bob ,
​You must be utilizing the Weight distribution hitch system to decrease the
toung weight at the hitch.
Being a Blue Ox dealer we have employed them on some coaches that had over
500 lbs .​


>
>
> ________________________________
>
>
>
> I pull a 9,000 lbs enclosed trailer with a car/shop behind a 12,000 lbs
> 403 powered Royale. Thus a 21,000lbs GVW. Weight on the GMC from that
> trailer is in the 1,200 lbs range. Granted. This extra weight is carried
> low. But 5 feet behind the far back wheels. Pulls, and handles fine at
> 75MPH. There are no extra sway bars, or any tracking improvements. But
> not fast from a stop light. What is a must to carry these extreme weights.
> Is a GMC that's has a very good original suspension system under it. Bob
> Dunahugh 78 Royale
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
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Jim Kanomata
Applied/GMC
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www.appliedgmc.com
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