| Re: [GMCnet] The impact of extra weight on GMC handling [message #327208 is a reply to message #327176] |
Sun, 17 December 2017 12:26   |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Senior Member |
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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
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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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