5th Gen V6 Bi-turbo
08-04-18, 01:58 PM
#1
Driver School Candidate
Thread Starter
5th Gen V6 Bi-turbo
Hello,
Am I the only one who takes issue with the new LS engine? I知 not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I知 concerned about long-term reliability...the niche that Lexus reigns supreme!!
Am I the only one who takes issue with the new LS engine? I知 not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I知 concerned about long-term reliability...the niche that Lexus reigns supreme!!
08-04-18, 02:26 PM
#2
Lexus Champion
This has been beaten to death, but you certainly have a valid point. I can't stand this new engine, but I wouldn't hesitate buying one if the LS500 was what I wanted. I'm sure it's going to end up plenty reliable.
08-04-18, 02:54 PM
#3
Lexus Champion
Hello,
Am I the only one who takes issue with the new LS engine? I知 not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I知 concerned about long-term reliability...the niche that Lexus reigns supreme!!
Am I the only one who takes issue with the new LS engine? I知 not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I知 concerned about long-term reliability...the niche that Lexus reigns supreme!!
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Rockville (09-01-18)
08-04-18, 02:58 PM
#4
Lexus Champion
08-04-18, 03:48 PM
#5
Small capacity turbos have their pros and cons, but it is a necessary evil due to modern day fuel consumption and emissions regulations.
Turbos biggest Achilles heel would have to be the lag, which can be eliminated with 48 V electric turbochargers which can accelerate the turbine to 70,000 rpm in just 2 milliseconds as presently used in F1 Racing and the new Mercedes in-line sixes, however 48 V electric turbos will probably be bypassed by hybrids and plug-in hybrids where the electric motors deliver almost instant torque.
Turbos biggest Achilles heel would have to be the lag, which can be eliminated with 48 V electric turbochargers which can accelerate the turbine to 70,000 rpm in just 2 milliseconds as presently used in F1 Racing and the new Mercedes in-line sixes, however 48 V electric turbos will probably be bypassed by hybrids and plug-in hybrids where the electric motors deliver almost instant torque.
08-05-18, 08:59 AM
#6
Lexus Fanatic
Hello,
Am I the only one who takes issue with the new LS engine? I’m not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I’m concerned about long-term reliability...the niche that Lexus reigns supreme!!
Am I the only one who takes issue with the new LS engine? I’m not a fan of turbos, much less two!?? My understanding is that Lexus builds the turbos and does not outsource them from a 3rd party...thoughts? I’m concerned about long-term reliability...the niche that Lexus reigns supreme!!
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sajack (06-24-24)
08-05-18, 10:41 AM
#7
Lexus Champion
I don't get why some of you are so obsessed with this stuff about Toyota (Lexus) and turbos. Toyota has been making turbos for a very long time. Toyota has had numerous turbo engines since the 1980's (I do not remember the Toyota engines before the 80s). They have had turbos all throughout the 1990s, 2000s and the current 2010s. You just don't see them that often in the North American market.
That all said I'm sure this V6 is a "reliable" engine per se.
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08-05-18, 03:06 PM
#8
Turbos have coolant lines and oil lines going through them. Just when all cars were finally getting rid of hydraulic power steering units that eventually all failed because of oil leaks at the canister or in the lines or in the rack. The turbos have intercoolers also. Lots to go wrong. Just saying its WAY more stuff to fail and leak.
08-05-18, 08:11 PM
#9
Lexus Fanatic
Turbos have coolant lines and oil lines going through them. Just when all cars were finally getting rid of hydraulic power steering units that eventually all failed because of oil leaks at the canister or in the lines or in the rack. The turbos have intercoolers also. Lots to go wrong. Just saying its WAY more stuff to fail and leak.
08-05-18, 08:15 PM
#10
Lexus Fanatic
Right. Heat, too.
Right, but you just have to wonder. I would put money down that any of the under-stressed N/A V8s would outlast this new TT V6 by a fair margin. Based on what I've read, this new engine has its work cut out for it. Motor Trend said that this motor "struggles" to move the car around when you lay into it. The old V8s just loaf around barely even working, let alone working hard.
That all said I'm sure this V6 is a "reliable" engine per se.
Right, but you just have to wonder. I would put money down that any of the under-stressed N/A V8s would outlast this new TT V6 by a fair margin. Based on what I've read, this new engine has its work cut out for it. Motor Trend said that this motor "struggles" to move the car around when you lay into it. The old V8s just loaf around barely even working, let alone working hard.
That all said I'm sure this V6 is a "reliable" engine per se.
08-11-18, 05:38 AM
#11
I don't understand why people are averse to turbos from a reliability standpoint. Basically every diesel engine in the world has a turbocharger, and they certainly do not fail at a high rate. While we are averse to diesel cars here in NA, they are very common elsewhere, and let's call a spade a spade, shall we? Our engines are all now direct injected anyways, (not that this has anything to do with turbos), so our engines are getting pretty blurred.
09-01-18, 10:24 AM
#12
Lexus Test Driver
Turbos have been around a long while...
Turbos have coolant lines and oil lines going through them. Just when all cars were finally getting rid of hydraulic power steering units that eventually all failed because of oil leaks at the canister or in the lines or in the rack. The turbos have intercoolers also. Lots to go wrong. Just saying its WAY more stuff to fail and leak.
in the late 80痴 I worked for SAAB and drove the 2.0 Liter with a single Garrett Air Research. There was lag between pushing on the gas pedal and feeling boost. After a while you became used to it and could time it effectively. This was an in-line slant 4 cylinder. With the growing popularity of V6 pwertrains you could use two smaller turbochargers, one in each bank. Turbo lag was reduced.
An intercooler is a means of cooling the airmass that you are sending with the turbo. Long pipes take away heat like a heat sink and you can get get more air to the engine when it is cooled down. You can also mitigate heat at the turbo bearing by water cooling the bearing housing.
Modern turbos have twin scrolling and electric boost. Fuel efficiency is improved. The new LS500 is faster a full second to 60 lag or not.
09-01-18, 12:37 PM
#13
Lexus Champion
Out of 4 cars in our family, 3 have turbo charged engines. One I4, one I6 and last one biturbo V8. I always keep the rpm where turbo boost starts. So called turbo lag is minimal. Turbo charger, super charger has been around for ages.
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sajack (06-24-24)
09-03-18, 11:07 PM
#15
Lexus Champion
The main advantage of a turbocharger is to increase the oxygen in the cylinder which leads to more explosive power.
in the late 80’s I worked for SAAB and drove the 2.0 Liter with a single Garrett Air Research. There was lag between pushing on the gas pedal and feeling boost. After a while you became used to it and could time it effectively. This was an in-line slant 4 cylinder. With the growing popularity of V6 pwertrains you could use two smaller turbochargers, one in each bank. Turbo lag was reduced.
An intercooler is a means of cooling the airmass that you are sending with the turbo. Long pipes take away heat like a heat sink and you can get get more air to the engine when it is cooled down. You can also mitigate heat at the turbo bearing by water cooling the bearing housing.
Modern turbos have twin scrolling and electric boost. Fuel efficiency is improved. The new LS500 is faster a full second to 60 lag or not.
I'd take the V8 all day long. Hell, I'd rather have my ancient 290hp V8 than what's in the new LS500.