Cruise Control Engine Revving
08-19-17, 02:20 PM
#16
Rookie
Thread Starter
I've been really looking to see if there was a setting or adjustment with no luck.
Most vehicles will go over or under something like 3-4 mph difference, especially going down hill before down shifts to lower gear. This one does it with 1 mph and feels like it's using breaks at first to slower speed immediately.
I've gotten to where I turn the cruse off when going downhill to keep it from doing that, I like getting all the MPGs I can.
Only thing about this car I wish was different, so that is saying something about how well I like it. LOL
Most vehicles will go over or under something like 3-4 mph difference, especially going down hill before down shifts to lower gear. This one does it with 1 mph and feels like it's using breaks at first to slower speed immediately.
I've gotten to where I turn the cruse off when going downhill to keep it from doing that, I like getting all the MPGs I can.
Only thing about this car I wish was different, so that is saying something about how well I like it. LOL
08-21-17, 12:34 PM
#17
I've been really looking to see if there was a setting or adjustment with no luck.
Most vehicles will go over or under something like 3-4 mph difference, especially going down hill before down shifts to lower gear. This one does it with 1 mph and feels like it's using breaks at first to slower speed immediately.
I've gotten to where I turn the cruse off when going downhill to keep it from doing that, I like getting all the MPGs I can.
Only thing about this car I wish was different, so that is saying something about how well I like it. LOL
Most vehicles will go over or under something like 3-4 mph difference, especially going down hill before down shifts to lower gear. This one does it with 1 mph and feels like it's using breaks at first to slower speed immediately.
I've gotten to where I turn the cruse off when going downhill to keep it from doing that, I like getting all the MPGs I can.
Only thing about this car I wish was different, so that is saying something about how well I like it. LOL
08-21-17, 01:15 PM
#18
Rookie
Thread Starter
The Hellcat was a retirement gift to myself and oh what fun that thing is, makes me feel 20 again!
The 2018 Ford is on order and due in new month. I currently have a 2015 exactly the same as what I ordered and it has been a great truck!
08-22-17, 09:16 AM
#19
Guys,
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even cars that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even cars that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
Last edited by pprj; 08-22-17 at 09:28 AM.
08-22-17, 09:33 AM
#20
Rookie
Thread Starter
Guys,
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even car that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even car that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
My point about the cruse is not the use of the down shift but the how it jumps to it so quickly with just correcting 1 mph. If you hit resume and are currently running several miles over the set cruse speed, it will apply breaks as well and downshifting, so be aware. Guess however that is better than just using the downshift.
If I get to a long down grade, I will down shift, not to protect the break pads but to prevent the breaks from overheating and fading. Saying that though, I will not downshift so much that I rev the RPMs to 4k, in fact I probably stay under 3k RPMs. I will actually use both, partial breaking and lower gear. Remember, the engine may be at higher RPMs but they are non-load RPMs and actually more load on the tranny than engine. Just my thoughts on that.
The following users liked this post:
milk659 (08-25-17)
08-22-17, 09:35 AM
#21
I don't notice too much variation going up a hill but down is a different story. I find it more of a nuisance in hilly areas. Combined with fellow motorists slowing down, up a hill and speeding up, down a hill, I just turn it off. Most conditions it works well but I probably only use it 2-5% of my driving time. Not a deal breaker for consideration of purchase.
08-22-17, 09:38 AM
#22
"If you hit resume and are currently running several miles over the set cruse speed, it will apply breaks as well and downshifting, so be aware."
+1 and the dirty look from the passenger!
+1 and the dirty look from the passenger!
08-22-17, 09:41 AM
#23
Rookie
Thread Starter
I don't notice too much variation going up a hill but down is a different story. I find it more of a nuisance in hilly areas. Combined with fellow motorists slowing down, up a hill and speeding up, down a hill, I just turn it off. Most conditions it works well but I probably only use it 2-5% of my driving time. Not a deal breaker for consideration of purchase.
08-22-17, 09:42 AM
#24
Rookie
Thread Starter
08-22-17, 11:31 AM
#25
Nothing wrong with being picky! is there ? lol
The following users liked this post:
currybob (08-22-17)
08-22-17, 01:04 PM
#26
Guys,
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even cars that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
I just joined this forum a few minutes ago. Reading everything to decide if a RX350 is in my future.
We currently have 3 cars: Toyota Sienna, Audi S4 and Porsche 911 and it's time to trade in the Audi and move to something else.
I wanted to chime in here because this "using the gearbox to reduce speed" issue actually bothers me a bit.
Anecdotally, please know that the 911 does exactly the same thing with the gearbox. And the 911 is not shy, believe me. 4k RPM? It does that all the time. It goes even higher. It is quite annoying and very ineffective when compared to the way the Audi implements this.
The Audi, on the other hand, never uses the gearbox, relying on the brakes only. Also, even on steep climbs, the Audi is never more than 1mph off the set speed, up or downhill. It is quite impressive and very precise.
The Toyota is the worst. I usually see variations up to 4 mpg uphill. And I'm not convinced the car is doing anything at all to control the speed downhill. I once saw the speed 7 mph above the set value on a long downhill.
The use of the gearbox bothers me for several reasons:
1) as we know, the engine wear is proportionate to the square of the RPM. So pushing the engine to 4k RPM from, let's say, 1.5k RPM causes unnecessary stress and wear on engine components. The wear is, in this particular example, 7 times worse! Not 100% worse, not 200%, But 700% worse. Not good.
2) This is not how we drive regularly. If we were in control of the car we would first try a quick stab on the brakes to reduce speed. Only on very long downhills we - humans - would downshift. So the computer is driving using a technique that I call unnatural. It translates to a very unpleasant driving experience, specially if you live in an region with lots of rolling hills and
3) Brake pads are cheap to replace! Very cheap actually. So use the brakes!!!! Do not stress my engine, please!
Anyways, I just wanted to share that even cars that are supposedly high tier, like a modern 911, use downshifts to control the cruise control. I don't like it and I'm happy I'm not the only one. :-)
Anyways, nice to meet you all. I will read it all, browse several discussions here as the RX 350 is certainly in my short list.
Thanks.
If you're really worried and you love technology, get the 450h for really what is $2670 more. That doesn't even factor in the cost of maintenance items like brakes, which don't need to be replaced as often.
08-25-17, 01:35 PM
#28
Pole Position
I'm sorry but I don't get it? You buy a car that is full of advanced technology to make driving easier and safer and yet you want to disconnect and override it when it's doing its thing and operating as it should Just as every other intelligent cruise control does
The following users liked this post:
Nail34 (08-25-17)
08-26-17, 04:37 PM
#29
Check out a thread I started how the things arent all good with my new RX.
https://www.clublexus.com/forums/rx-...-rx-350-a.html
My Audi did not have any creaks, did not have any connectivity issues, the cruise control worked flawlessley ... I can go on and on. But in reality I own a Lexus now, whihc i preferred due to comfort. My 2 cents: if you want cutting edge technology, german car is a way to go.
Oh, and if you find a way to fix the revving up issue without touching the pedals, please do share.
Just found out my thread is CLOSED. I just wanted to post what was found to be the issue for ratting. I guess that will remain a secret with me
08-26-17, 05:02 PM
#30
Rookie
Thread Starter
At least the cruse control is some of the best design layouts I know.
With very little learning you can totally operate it without taking your eyes off the road. You can easily just feel to turn on, activate, increase 1 mph, decrease 1 mph and deactivate. I have owned many different vehicles and Toyota and I believe it was Porsche, had the type of design.
We have also owned many Toyota vehicles over the years and while the controller was the same design the breaking/downshifting over 1 mph is unique to Lexus. We traded a 2017 Tacoma for this RX and it would not react to down shift till it was 3-4 mph over and never applied breaking to it.
With very little learning you can totally operate it without taking your eyes off the road. You can easily just feel to turn on, activate, increase 1 mph, decrease 1 mph and deactivate. I have owned many different vehicles and Toyota and I believe it was Porsche, had the type of design.
We have also owned many Toyota vehicles over the years and while the controller was the same design the breaking/downshifting over 1 mph is unique to Lexus. We traded a 2017 Tacoma for this RX and it would not react to down shift till it was 3-4 mph over and never applied breaking to it.