Turbo Lag ?
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06-13-2018, 12:21 PM
#4
There are two potential issues I see with turbo engine:
1. Hesitation off the line = how long does it take fro vehicle to start moving once accelerator is depressed
2. Lag: How long before turbo spools up to provide boost. May vary depending on starting RPM.
I had a 1.8 Turbo Passat and the hesitation was almost dangerous when trying to get through busy traffic from a stand still because it would lag almost a second before moving. Hated this about that car! How long it took the turbo to kick in to add the extra power was directly related to RPMs and very predictable.
So, any RDX owners seeing any hesitation versus turbo lag?
1. Hesitation off the line = how long does it take fro vehicle to start moving once accelerator is depressed
2. Lag: How long before turbo spools up to provide boost. May vary depending on starting RPM.
I had a 1.8 Turbo Passat and the hesitation was almost dangerous when trying to get through busy traffic from a stand still because it would lag almost a second before moving. Hated this about that car! How long it took the turbo to kick in to add the extra power was directly related to RPMs and very predictable.
So, any RDX owners seeing any hesitation versus turbo lag?
06-13-2018, 12:45 PM
#5
Team Owner
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Carbon2008RDX (06-18-2018)
06-13-2018, 12:48 PM
#6
Team Owner
There are two potential issues I see with turbo engine:
1. Hesitation off the line = how long does it take fro vehicle to start moving once accelerator is depressed
2. Lag: How long before turbo spools up to provide boost. May vary depending on starting RPM.
I had a 1.8 Turbo Passat and the hesitation was almost dangerous when trying to get through busy traffic from a stand still because it would lag almost a second before moving. Hated this about that car! How long it took the turbo to kick in to add the extra power was directly related to RPMs and very predictable.
So, any RDX owners seeing any hesitation versus turbo lag?
1. Hesitation off the line = how long does it take fro vehicle to start moving once accelerator is depressed
2. Lag: How long before turbo spools up to provide boost. May vary depending on starting RPM.
I had a 1.8 Turbo Passat and the hesitation was almost dangerous when trying to get through busy traffic from a stand still because it would lag almost a second before moving. Hated this about that car! How long it took the turbo to kick in to add the extra power was directly related to RPMs and very predictable.
So, any RDX owners seeing any hesitation versus turbo lag?
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mattski (06-13-2018)
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06-13-2018, 01:05 PM
#8
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I also had a 2001.5 Passat 1.8T.
The first time I pulled out in traffic, I almost needed a change of underwear. Took a while to get used to.
The RDX with a quicker-spooling turbo and 5.25:1 first gear has no delay or turbo lag.
Progress ftw.
The first time I pulled out in traffic, I almost needed a change of underwear. Took a while to get used to.
The RDX with a quicker-spooling turbo and 5.25:1 first gear has no delay or turbo lag.
Progress ftw.
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Curious3GTL (06-13-2018),
mattski (06-13-2018)
06-13-2018, 01:55 PM
#9
Nuke
Test drove an ASpec for 45 minutes on monday, city streets and toll highway. No discernable turbo lag at all. The shifts are very smooth and barely discernable. The transmission jumps down a few gears on harder acceleration, very smooth. In fact the auto engine stop is hardly discernable, just a brief shudder when you take your foot off the brake. I still don’t like this and would turn it off.
There has been discussion on the forum that the 20 inch wheels are harsh and don’t handle as well as the 19s. I really doubt most could tell any difference and would expect the 20’s to be nimbler. I checked tire pressure and they had them pumped up to 41 pounds, specs were for 36 in each for the 20’s. I was amazed how good the ride was with the 20 inch tires and higher pressure. The car handles very nicely for a SUV. Overall a solid comfortable car. Not worried about that trans (it IS the same as in the Odyssey) but I will still wait 6 months to monitor complaints.
There has been discussion on the forum that the 20 inch wheels are harsh and don’t handle as well as the 19s. I really doubt most could tell any difference and would expect the 20’s to be nimbler. I checked tire pressure and they had them pumped up to 41 pounds, specs were for 36 in each for the 20’s. I was amazed how good the ride was with the 20 inch tires and higher pressure. The car handles very nicely for a SUV. Overall a solid comfortable car. Not worried about that trans (it IS the same as in the Odyssey) but I will still wait 6 months to monitor complaints.
06-14-2018, 06:11 PM
#10
Suzuka Master
I agree, we test drove a RDX twice and I was shocked at how there was no noticeable turbo lag. I am looking at a G80 Sport with with twin turbo V6 and it had noticeable Turbo lag vs. the RDX which was not noticeable.
06-15-2018, 07:15 AM
#11
mrgold35
I feel less of a lag in my 08 RDX (Hondata+ETS Intercooler) when I slowly apply the accelerator for max speed from a stop. The RDX really experiences turbo lag or a bogged down feeling when I mash the accelerator from a stop for 0-60 runs. My best launches in the low 6's are when I brake torque to spool up the turbo +2000 rpms.
How does the +19 RDX feel with those 3 different launch techniques?
How does the +19 RDX feel with those 3 different launch techniques?
06-15-2018, 11:49 AM
#12
Suzuka Master
My wife had a 10 RDX and that turbo was horrible, lag and then came on all at once, she hated it. The 19 RDX Turbo is well refined and comes across fairly linear, yet powerful. The biggest dine is the noise of the 4 banger vs. how quite her 16 V6 RDX is under acceleration.
06-18-2018, 01:42 PM
#13
My wife had a 10 RDX and that turbo was horrible, lag and then came on all at once, she hated it. The 19 RDX Turbo is well refined and comes across fairly linear, yet powerful. The biggest dine is the noise of the 4 banger vs. how quite her 16 V6 RDX is under acceleration.
06-18-2018, 01:50 PM
#14
Burning Brakes
06-18-2018, 05:03 PM
#15
Carbon Bronze Pearl 2008
06-19-2018, 04:46 PM
#17
I just took a test drive and nope, no turbo lag. I actually think Sport mode might be a little too much for daily driving lol. It's more than adequate in Normal; I'm used to driving my TLX in Sport mode. The turbo comes on really strong at the low rpms, which I think is really great for city driving and passing/merging situations.
06-20-2018, 10:31 AM
#19
mrgold35
06-20-2018, 10:33 AM
#20
Burning Brakes
Yep, that will be the case with any transmission with a lot of gears (7/8/9/10). Computer tries to keep it in the optimal gear for the current speed and/or load. Much like a CVT in that regard. Used to own a Subaru with CVT and there would be times where a gust of wind would cause the RPM to go up just from the additional air resistance and the computer would adjust the 'gear' ratios.
06-20-2018, 12:18 PM
#21
Drifting
No question the 10-speed transmission is shift happy. That's by design. But it seems to be able to get itself in a good gear pretty rapidly most of the time. Much better than the ZF 9-speed.
It feels quite different from the Honda 6-speed with the V6, so it will be an adjustment if you're coming from that. But not really in a bad way. Just different.
The main thing I notice is the abruptness of the LAUNCH from a stop in sport mode. Gotta tame my heavy right foot.
It feels quite different from the Honda 6-speed with the V6, so it will be an adjustment if you're coming from that. But not really in a bad way. Just different.
The main thing I notice is the abruptness of the LAUNCH from a stop in sport mode. Gotta tame my heavy right foot.
06-20-2018, 12:37 PM
#23
Drifting
So you guys are just gonna have to work that one out. Like the marital strife in the days before memory seats linked to individual fobs.
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Madd Dog (06-24-2018)
06-20-2018, 01:13 PM
#24
I think I read somewhere that it will default back to Sport mode if it was in Sport+ mode before it got turned off. But on restart after being in Sport mode or Comfort mode, it will retain that setting.
So you guys are just gonna have to work that one out. Like the marital strife in the days before memory seats linked to individual fobs.
So you guys are just gonna have to work that one out. Like the marital strife in the days before memory seats linked to individual fobs.
06-20-2018, 11:43 PM
#25
Drifting
Owner's Manual pg. 427
• If Comfort mode or Sport mode was previously registered, Comfort mode or Sport mode will be reactivated.
• If Snow mode was previously registered, the drive mode will be changed to Comfort mode.
• If Sport+ mode was previously registered, the drive mode will be changed to Sport mode.
• If Comfort mode or Sport mode was previously registered, Comfort mode or Sport mode will be reactivated.
• If Snow mode was previously registered, the drive mode will be changed to Comfort mode.
• If Sport+ mode was previously registered, the drive mode will be changed to Sport mode.
06-24-2018, 05:46 AM
#28
No turbo lag
I bought on June 4; now have 780 miles on it. No discernible lag.
06-30-2018, 02:09 AM
#29
You'll Never Walk Alone
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Just picked up my 19 RDX today, and also spent like 2 hours test driving 2 different trims prior to purchasing. I was focusing on turbo lag and the transmission. I am not able to feel much, if any turbo lag, and the tranny shifts quickly and smoothly.
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R. White (06-30-2018)
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R. White (06-30-2018)
07-04-2018, 11:33 AM
#31
WayTooManyAcuras
I've been taking it easy on the car to begin with, but when I've had to "hit it", I noticed no turbo lag at all. Nothing like the 2007 RDX I had way back when.
09-13-2019, 08:12 PM
#32
I floored the car to pass a mustang on a merging lane. I floored it in Comfort, and there was a lag. Car took a while to get started, then turbo kicked in and it stuck at 4k RPM for a good 5s then it dropped again. Scared me for a while. I normally drive in Sport, and hope this was a one time thing.
09-13-2019, 09:21 PM
#33
Gearhead
What gear were you in or how fast were you going? I have noticed that if I floor it when it is in 10th, it can take a while to find the right gear if I am doing about 60 mph when this all occurs. The transmission can drop a max of 4 gears at a time. I can pretty easily reproduce the behavior you've experienced if I am going about 60-70 mph at a light throttle opening and floor it. The tranny takes a second, drops 4 gears then tries to figure out what gear it really needs at that speed for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
09-13-2019, 10:19 PM
#34
What gear were you in or how fast were you going? I have noticed that if I floor it when it is in 10th, it can take a while to find the right gear if I am doing about 60 mph when this all occurs. The transmission can drop a max of 4 gears at a time. I can pretty easily reproduce the behavior you've experienced if I am going about 60-70 mph at a light throttle opening and floor it. The tranny takes a second, drops 4 gears then tries to figure out what gear it really needs at that speed for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
09-14-2019, 03:43 AM
#35
What gear were you in or how fast were you going? I have noticed that if I floor it when it is in 10th, it can take a while to find the right gear if I am doing about 60 mph when this all occurs. The transmission can drop a max of 4 gears at a time. I can pretty easily reproduce the behavior you've experienced if I am going about 60-70 mph at a light throttle opening and floor it. The tranny takes a second, drops 4 gears then tries to figure out what gear it really needs at that speed for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
In this situation a 10 speed gearbox is not a real benefit, especially if you are in 9th or 10th gear and need to be in 3rd, 4th or 5th for max acceleration.
09-14-2019, 06:37 AM
#36
Gearhead
There are 2 downsides to running in the S+ mode, at least on the Advance package. One of them applies to all RDXs and that is more of the engine noise piped in. I could clearly do without that especially since it is a high revving engine and doesn't have a good exhaust note to begin with. The second one is the S+ mode dials up the shocks to a firmer setting. On some of the roads I drive on, I don't need it any firmer as they are clearly in need of repair. This won't be an issue on the Aspec, Tach or base versions as they don't have the adjustable suspension.
The way around that is just to leave the trans in S mode while the driving dynamics in comfort mode. Most of the time I think I might be in a situation to pass I just start tapping the paddle downshifter to get me close to where it can skip the 4 gears and be in the "right" gear pretty quickly.
I am not sure if 10 gears were really needed but this tranny is so much better than the 9 speed in the Pilot/MDX that I don't really want to complain. This tiny motor, even turbo'd, doesn't really have the torque to pull the taller gears very well. So if you need any real acceleration, or even much of a hill, it needs to start downshifting. It would be interesting to see how a tune impacts this aspect as well.
The way around that is just to leave the trans in S mode while the driving dynamics in comfort mode. Most of the time I think I might be in a situation to pass I just start tapping the paddle downshifter to get me close to where it can skip the 4 gears and be in the "right" gear pretty quickly.
I am not sure if 10 gears were really needed but this tranny is so much better than the 9 speed in the Pilot/MDX that I don't really want to complain. This tiny motor, even turbo'd, doesn't really have the torque to pull the taller gears very well. So if you need any real acceleration, or even much of a hill, it needs to start downshifting. It would be interesting to see how a tune impacts this aspect as well.
09-14-2019, 07:17 AM
#37
The piped in sound does not really bother me.........I need to use the paddle shifters to downshift as well at times, especially to slow down and not have to hit the brakes hard. I like stiffer suspension especially here living in the mountains with lots of curvy roads. Good luck on finding your sweet spot.....:-)
09-14-2019, 04:40 PM
#38
5th Gear
Coming off a Honda S2000, where you needed to wring it to about 5k RPM to get it to pull hard, this thing is a beast.
No regrets on that change (S2000 -> 2020 RDX SH-AWD A-Spec
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