| ride height analysis observation [message #253589] |
Sat, 28 June 2014 20:53  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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Being the over analytical type that I am I was looking at the ride height vs shock travel in the rear with my new Bilstein shocks.
It looks like at ride height the shocks are about 1 - 1 1/2 inch into their travel out of 6 inches of suspension travel.
It seems odd to me that the coach runs at the bottom of travel like that. It seems the coach would catch air on rebound.
Has anyone else noticed this?
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: ride height analysis observation [message #253596 is a reply to message #253589] |
Sat, 28 June 2014 21:29  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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Keith V wrote on Sat, 28 June 2014 19:53Being the over analytical type that I am I was looking at the ride height vs shock travel in the rear with my new Bilstein shocks.
It looks like at ride height the shocks are about 1 - 1 1/2 inch into their travel out of 6 inches of suspension travel.
It seems odd to me that the coach runs at the bottom of travel like that. It seems the coach would catch air on rebound.
Has anyone else noticed this?
The total travel of an unmolested coach is 8", but that is designed for camping and leveling/ I suspect that up and down movement around normal ride height is much less than that and possibly not centered around the normal ride height.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: ride height analysis observation [message #253602 is a reply to message #253596] |
Sat, 28 June 2014 21:48 |
Keith V
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Registered: March 2008
Location: Mounds View,MN
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Bob de Kruyff wrote on Sat, 28 June 2014 21:29
The total travel of an unmolested coach is 8", but that is designed for camping and leveling/ I suspect that up and down movement around normal ride height is much less than that and possibly not centered around the normal ride height.
The 6 inch measurement was rough shock travel, not wheel travel
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: ride height analysis observation [message #253640 is a reply to message #253602] |
Sun, 29 June 2014 10:19 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
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Keith V wrote on Sat, 28 June 2014 20:48Bob de Kruyff wrote on Sat, 28 June 2014 21:29
The total travel of an unmolested coach is 8", but that is designed for camping and leveling/ I suspect that up and down movement around normal ride height is much less than that and possibly not centered around the normal ride height.
The 6 inch measurement was rough shock travel, not wheel travel
I wasn't picking on the total shock travel as much as the idea that normal ride height is probably not centered within the total travel range.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: ride height analysis observation [message #253690 is a reply to message #253592] |
Sun, 29 June 2014 18:17 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
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lotsofspareparts wrote on Sat, 28 June 2014 18:59As heavy as these coaches are, that would be one hell of a rebound.
Jared
WHEEEEE!!!!!
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: ride height analysis observation [message #253693 is a reply to message #253692] |
Sun, 29 June 2014 18:29 |
lotsofspareparts
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Registered: May 2014
Location: Arlington, WA
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I am not fully understanding what you are saying Dave, it appears to me that raising the wheel compresses the shock at that wheel.
I'm confused.
Jared
edit, nevermind, you are completely correct as I just went and looked.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
[Updated on: Sun, 29 June 2014 18:32] Report message to a moderator |
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| Re: ride height analysis observation [message #253694 is a reply to message #253693] |
Sun, 29 June 2014 18:36 |
Otterwan
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Kind of hard to wrap you head around, but since the bottom of the shock is mounted to the frame, and the top of the shock is mounted to the boggie arm by the airbag, raising the wheel compresses the airbag and extends the shock. Lowering the wheel extends the airbag and compresses the shock.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: ride height analysis observation [message #253696 is a reply to message #253694] |
Sun, 29 June 2014 18:43 |
lotsofspareparts
Messages: 726
Registered: May 2014
Location: Arlington, WA
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You can't see the frame mount in the photo you provided, that's why I was confused. After my post I went outside to see since I have my wheels in the bed of my truck so I can drop them off at Les Schwab tomorrow.
Kind of a curious setup.
Jared
Jared & Tina Lazaron + 14yr old Daughter.....
77 Eleganza II "Recherché".....
73 Canyon Lands 230 "Elephant"
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| Re: ride height analysis observation [message #253737 is a reply to message #253692] |
Sun, 29 June 2014 22:47 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
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Otterwan wrote on Sun, 29 June 2014 18:23Are you taking into account that the shocks work backwards from most suspension? That is, raising a rear wheel extends a shock, lowering it compresses it. You can see from this photo how that works:
...
Yes I understand how it works, I just really expected the nominal ride height to be in the center of travel.
What I found however is it's way to one end of travel.
Specifically it has about >4" of suspension compression and <2" of extension as measured at the shock.
I didn't measure precisely.
now it may be that when the coach is level, the shocks are in the center of the travel?
But we know the coach in travel stance runs nose up like an old gasser...
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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