| Why not use the bogies to set the rear ride height? [message #275691] |
Sun, 12 April 2015 15:24  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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It seems like a bad idea to me to set the ride height using a slot in the frame 4 feet from the center of rotation of the rear suspension. It makes a lot more sense to measure the bogie height. Then the front ride height has no effect on the rear height.
Or is the thought that it just doesn't really matter that much?
It's a nice day and I was just thinkin....
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Why not use the bogies to set the rear ride height? [message #275695 is a reply to message #275691] |
Sun, 12 April 2015 17:25  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
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Keith, you can actually measure any fixed point on the frame. Or the body for that matter but before you decide that the measurement at the grease fitting on the bogie or the bottom of the belt moulding or whatever, you need to have the ride height set per the book. Then you can measure from whatever and have a new benchmark. Keep in mind though that if you change the front ride height, the rear will change unless you are measuring directly ABOVE the slot in the frame...say the top of the gen or propane door directly above the slots in the frame.
I guess the reason that GM said measure at the frame is because the body pads would/could compress and throw most other locations off over time.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: Why not use the bogies to set the rear ride height? [message #275730 is a reply to message #275691] |
Sun, 12 April 2015 22:57 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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Keith V wrote on Sun, 12 April 2015 14:24It seems like a bad idea to me to set the ride height using a slot in the frame 4 feet from the center of rotation of the rear suspension. It makes a lot more sense to measure the bogie height. Then the front ride height has no effect on the rear height.
Or is the thought that it just doesn't really matter that much?
It's a nice day and I was just thinkin....
Glad you're thinking and that's the fun of these things. However, the center of rotation is determined by the center of gravity which may or may not be at the center of the rear suspension--in this case it is not.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Why not use the bogies to set the rear ride height? [message #275761 is a reply to message #275730] |
Mon, 13 April 2015 09:29 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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Bob de Kruyff wrote on Sun, 12 April 2015 22:57
Glad you're thinking and that's the fun of these things. However, the center of rotation is determined by the center of gravity which may or may not be at the center of the rear suspension--in this case it is not.
Oh good point.
An looking at the math, unless the front is way off it won't matter all that much, and if the front IS way off... it won't matter that much either.
My other thought was tire size effect, but if you have the same size tires all around it doesn't matter either.
Fine, I'll find something else to worry about 
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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