| [GMCnet] Pneumatics question relating to the Quadra-bag [message #105533] |
Tue, 09 November 2010 11:04  |
GMC_LES
Messages: 569
Registered: October 2009
Location: Montreal
Karma:
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Senior Member |
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I woke up this morning with an idea in my head and it's been bugging me ever
since!
I've read several comments that indicate that the 4 bag rear suspension
upgrades (Harrison & Applied) give a slightly harsher ride than the original
single bag system. I may be wrong, but I think that the harsher ride may to be
due to the smaller internal volume of the new 4-bag components as compared to
the original single bag system.
My idea is this:
Why can't we add a small "ballast air" tank on each side, plumbed into the
tubing between the ride height valve and the bags so that it adds air volume to
the bags? This would increase the volume of air that can be compressed as
the suspension encounters bumps, resulting in a softer ride. It is the pressure
of the air in the bag that determines ride height. The volume of the compressed
air in the bag is one of the factors that determines the "spring rate" or ride
firmness.
The only negatives I can see with such a set-up would be:
- Compressor will run longer to raise coach due to the extra air needed to fill
the small ballast tanks.
- Coach handling may be affected slightly.
- Complexity of system is increased, more places for leaks to develop.
Comments anyone?
Thanks,
Les Burt
Montreal
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Les Burt
Montreal
1975 Eleganza 26ft
A work in Progress
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