Issue with Ride Quality and Sound
08-25-21, 07:35 AM
#16
Driver School Candidate
Thread Starter
Hello all,
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is dealership standard. Is the PSI too high?
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is dealership standard. Is the PSI too high?
08-25-21, 08:04 AM
#17
Lexus Test Driver
Hello all,
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is dealership standard. Is the PSI too high?
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is dealership standard. Is the PSI too high?
08-25-21, 08:21 AM
#18
Driver School Candidate
Thread Starter
08-25-21, 08:22 AM
#19
Lexus Test Driver
08-25-21, 02:01 PM
#20
You should set the cold tire pressure to what the label on the inside of the driver’s door indicates.
I have an f sport so different tires, but they are very sensitive. I can tell when they are just a pound or two to high or low. I maintain them at the recommended pressure on the door plate.
I have an f sport so different tires, but they are very sensitive. I can tell when they are just a pound or two to high or low. I maintain them at the recommended pressure on the door plate.
The following users liked this post:
kalel2127 (08-25-21)
08-25-21, 03:51 PM
#21
Pole Position
Agreed! However, if you wish to sacrifice miles-per-gallon for a gain in ride comfort and noise reduction, you can reduce your tire pressures a couple of pounds at a time, until you hit your comfort zone. I agree with Mikemu30 too, 33 psi seems like a good compromise, but I wouldn't go lower if your door spec says 39.
08-25-21, 07:29 PM
#22
Lexus Fanatic
Hello all,
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is
dealership standard. Is the PSI too high?
To those that were curious: I took my car into the dealership. The car actually does produce a lot of sound on highway roads and going on fast speeds. That's just by design. German cars and the LS models have more sophisticated noise cancellation. There were problems with the smoothness of the ride. This is because the tires were not balanced. They actually increased the PSI to 39 though and said 38-39 is
dealership standard. Is the PSI too high?
08-26-21, 05:12 AM
#24
Lexus Test Driver
I guess I'm spot on with 33psi cold for the 19' FSport tires.
08-26-21, 07:40 AM
#25
It's not really an exact science, people all over the world are driving around with "incorrect" tire pressures. You should keep it as close as you can but lets say you set it to 35, unless you're checking and re-inflating every week, it's not staying at 35 lol. not really something to bro too hard over. As long as you're within the 30-40 range.
FWIW both my ESs came with 44 PSI cold. Apparently according to TCCN (Master Toyota tech) this is the standard from the manufacturer. Do I like it? No. A bit too hard. So I set it to about 38 or so as I prioritize fuel economy since I have a hybrid. If you drive a hybrid you can drive higher than what the door jamb says. Season to taste sort of thing.
FWIW both my ESs came with 44 PSI cold. Apparently according to TCCN (Master Toyota tech) this is the standard from the manufacturer. Do I like it? No. A bit too hard. So I set it to about 38 or so as I prioritize fuel economy since I have a hybrid. If you drive a hybrid you can drive higher than what the door jamb says. Season to taste sort of thing.
08-26-21, 11:24 AM
#26
Lexus Fanatic
I set them lower than the manual. The manual pressures are designed to deliver better fuel economy at the expense of ride comfort. I run them 2-3 PSI lower than the manual pressures and ride is considerably better and I haven’t had any issues with wear.
08-26-21, 12:03 PM
#27
Pole Position
I set my tires to a few pounds above the door jam chart at each oil change, about every 6 months. This way, as air naturally leaks out over time, they are close to the sweet spot, more of time. By the next oil change, I'm usually a few pounds below the spec. Had I set them initially to spec, I would be 4-5 lbs below spec, which is more than I'm comfortable with. Some might say, why not check them more often and keep them right at spec. To this I would say, I'm a busy man with many vehicles!
08-26-21, 12:26 PM
#28
Lexus Fanatic
I set my tires to a few pounds above the door jam chart at each oil change, about every 6 months. This way, as air naturally leaks out over time, they are close to the sweet spot, more of time. By the next oil change, I'm usually a few pounds below the spec. Had I set them initially to spec, I would be 4-5 lbs below spec, which is more than I'm comfortable with. Some might say, why not check them more often and keep them right at spec. To this I would say, I'm a busy man with many vehicles!
08-26-21, 03:27 PM
#29
Pole Position
1. Safety (Handling and Performance)
3. Rolling Resistance (for better MPG's)
2. Optimal Tread Life
5. Ride Comfort
6. Noise
08-26-21, 03:51 PM
#30
Lexus Fanatic
The car has a real time tire pressure monitoring system, so there isn’t any risk of tires deflating lower than you realize. There’s no safety tradeoff.
By airing the tires higher than the vehicle manufacturer recommends you’re already potentially compromising handling if you use that as a benchmark.
By airing the tires higher than the vehicle manufacturer recommends you’re already potentially compromising handling if you use that as a benchmark.