Last post on Aug 03, 2011 at 6:34 PM
You are in the Acura MDX
What is this discussion about?
Acura MDX, SUV
#14 of 23 Re: 2011 MDX Tech vs Advanced-suspension [cha2]
Aug 02, 2011 (8:54 am)
The 2011 Advance has stiffer stability bars, which provides a nice improvement on curves. The ADS is an incredible system that works smoothly and keeps the vehicle very leveled on all kinds of roads.
If your suspension is too soft, just add more pressure to your tires. The higher pressure will add more feedback to the shock control/valve system and will provide a stiffer ride. You can put 36 PSI cold, and you will notice the difference. This works even on the 2011 MDX Advance Damper System vehicles, which will make the comfort mode stiffer and the sport mode, even stiffer...
#15 of 23 Re: 2011 MDX Tech vs Advanced-suspension [acmdx]
Aug 02, 2011 (11:30 am)
I could be wrong, but I don't believe adding air to the tires will stiffen the suspension. I believe all it does it make you feel the road more, and feel the roughness of the road more, and feel the bumps more. It should have nothing to do with the suspension itself. You don't want to over-inflate the tires. My Owner's Manual says: "Overinflated tires can make your vehicle ride more harshly, are more prone to damage from road hazards, and wear unevenly."
Driving on under-inflated tires is dangerous, yet will give a softer ride. Driving on over-inflated tires can actually DECREASE handling as less tread may be touching the road even though you "feel" the road more which can give a false sense of better handling.
#16 of 23 Re: 2011 MDX Tech vs Advanced-suspension [cloviskid]
Aug 02, 2011 (11:06 am)
We are not talking 40+ psi, but just 4 psi of additional tire pressure. You are right in that you should never overinflate your tires.
32 Is the normal tire psi, 34 or 36 psi is the recommended pressure when you have any kind of load in your MDX. You definitely don't want to tow any load with your tires at 32 psi...
When I first got my 2011 MDX, all the bushings/suspension were tight and I could feel all the road feedback, now at 14,000, it is very quiet and smooth at 32 or 36 psi of pressure in my tires.
I have a 2011 MDX ADV, and when you put more pressure in your tires, it provides more feedback to the shock control mechanism (in the case of the ADV MDX), or to the valving system (normal MDX), and makes your ride definitely more firm. This is what you do, too, when your shocks are old and begin to lose firmness, on older vehicles.
This is a well known old procedure, and it is easy to feel the difference on the ADV MDX, since the comfort is very soft, but once you add the pressure, it stiffens the ride. I used to do this on my old Mercedes SUV's because they use cheaply design/built shocks that lasted just a couple of years.
When they say overinflate tires, they are talking 40+ psi, and you should never exceed or even come close to the maximum psi stamped on the tire. Normally 50 psi or so...
#17 of 23 Re: 2011 MDX Tech vs Advanced-suspension [acmdx]
Aug 02, 2011 (12:03 pm)
I have just spoken to an Acura technician who told me that adding a few pounds of air pressure does NOT stiffen the suspension, but rather makes you "think" it has because it will ride a little rougher. Riding rougher will actually make the suspension work harder as it will have more vibrations to filter out.
That "well-known old procedure" is a myth.
Check with Acura yourself.
#18 of 23 Re: 2011 MDX Tech vs Advanced-suspension [cloviskid]
Aug 02, 2011 (12:36 pm)
Don't know why a knowleable mechanic will say the latter, if it is well known that when you provide more feedback to the shock's valve system, it will act as if you are going faster, and which shocks are tuned to become stiffer as the vehicle speed increases.. The more road feedback the stiffer the shocks become.. Again we are not talking about large psi increases, so you are not really increasing vibrations but lower frequency feedback to the shocks valving system, or in the case of the ADS, increase feedback to the sensors that gives input to the ADS system.
Shocks don't have a constant damp by design. If you are familiar with shocks, you will find that weak shocks or shocks with weak damping capabilities will make the car wobble, which is the usual problem with worned shocks or shocks with variable settings.
When you increase your damping factor, you will reduce your wobbling on uneven roads..
Even for towing purposes, you increase your psi to avoid overheating your tires (flexing issue) and to increase the damping capabilities of your shocks and to have more control during towing..
I am not telling this only from past experience. I am mentioning this because I like my MDX firmer when I am in the highway at around 70 mph, and it becomes very obvious how the handling changes when you put 36 psi vs. 32 psi. Just a couple of psi in your tires make a big difference..
It is not my intention to contradict anybody, I am just posting what I, and many people, do to improve handling or to improve driving conditions..
#19 of 23 Re: 2011 MDX Tech vs Advanced-suspension [acmdx]
Aug 02, 2011 (5:56 pm)
Thanks for the info. I am going to check into this a little more as this is very interesting information. Today I checked the tire pressure info on the dashboard and it read 35 lbs. for each tire. I just had service done at the dealer a couple weeks ago and that is what they put in.
We have to remember, though, that as we increase speed, the heat from the tire increases the air pressure. How much I don't know as I've never checked the pressure at different speeds. Might be interesting.
On most roads, I can't tell the difference between the Sport and Comfort settings, or at most a very small difference. But my MDX only has about 7600 miles on it. As time goes on, I suspect that I will eventually notice more of a difference.
#20 of 23 Re: 2011 MDX Tech/Adv great handling/ride improvement [acmdx]
Aug 03, 2011 (9:57 am)
I also own a 08 RL & 11 MDX. Both are excellent riding and no problems as of today. The mdx has more bells and whistles but both vehicles are better than my former 2007 Lexus RL. Espcially with the rear and side visibility. We have own nothing but toyotas or Acuras. In today's world I'll again buy an acura if I live another 7 years.
Good luck to all and stay safe.
#21 of 23 Re: 2011 MDX Tech vs Advanced-suspension [cloviskid]
Aug 03, 2011 (10:06 am)
Hi Cloviskid. I agree with you as I also purchased the Advance system and my wife and I drove 7500 miles from Ca, across country, through Zion, and over the badlands and the Acura did a wonderful job making our trip pleasurable. My wife retired this year, (Im 69) and we are driving again across the country and visit wit our son and his family in Rockford Illinois and then tour up north coming home. This is the best Acura I have owned and I intend to keep both of our vehicles for a long time.
Good luck to all and stay safe.
#22 of 23 Re: 2011 MDX Tech vs Advanced-suspension [cloviskid]
Aug 03, 2011 (6:34 pm)
"..Check with Acura yourself..."
And encounter yet another IDIOT like you did...no thanks.
"..Does not stiffen the suspension.."
Correct, it only "stiffens" the tire sidewall. And yes, with a a higher tire inflation level, "stiffened sidewall" the MDX will ride a little rougher.
"..suspension work harder.."
Isn't that the point..?