The new twin scroll 2.0 turbo
04-20-14, 05:09 AM
#1
Guest
Posts: n/a
The new twin scroll 2.0 turbo
http://pressroom.lexus.com/releases/...?view_id=39709
235hp
258 lbs torque
Not sure of MPG yet. This is very very competitive and a good sign as the first of many new forced induction engines.
It will be interesting to see if the engine can actually be tuned or not.
235hp
258 lbs torque
Not sure of MPG yet. This is very very competitive and a good sign as the first of many new forced induction engines.
It will be interesting to see if the engine can actually be tuned or not.
04-20-14, 06:54 AM
#3
Lexus Champion
Everyone is downsizing due to efficiency regulations. I don't think we can fight it, unfortunately.
04-20-14, 07:06 AM
#5
Lexus Champion
04-20-14, 07:38 AM
#6
Lexus Fanatic
iTrader: (20)
partly because on german cars in particular there's widely available options to upgrade the software or 'chip' for more boost, different performance characteristics, etc.
but no third party has ever done this for a toyota. my understanding is the software is encrypted and hasn't been 'cracked'.
i'm in agreement, and like yardie said, give me a v8 over a v6 too. 
after recently trying a new highlander, the v6 seemed gutless compared to the v8 in my explorer. but it was certainly adequate and smooth.
i am saddened by car companies being forced to put turbo 4 bangers in anything but small, light vehicles (i don't consider the nx to be small and certainly not light). it's not toyota/lexus' fault though, they're all forced to do this by clueless and out of control bureaucrats, who will never stop pushing for more economy, no matter how unreasonable the request, or what cost is adds to the vehicle.
but no third party has ever done this for a toyota. my understanding is the software is encrypted and hasn't been 'cracked'.
Give me a V6 anyway over a 2L Turbo
after recently trying a new highlander, the v6 seemed gutless compared to the v8 in my explorer. but it was certainly adequate and smooth.i am saddened by car companies being forced to put turbo 4 bangers in anything but small, light vehicles (i don't consider the nx to be small and certainly not light). it's not toyota/lexus' fault though, they're all forced to do this by clueless and out of control bureaucrats, who will never stop pushing for more economy, no matter how unreasonable the request, or what cost is adds to the vehicle.
04-20-14, 07:40 AM
#7
Lexus Fanatic
iTrader: (20)
about this lexus new turbo... i'm sure it's been extremely well tested, but i wouldn't want one in the first year or two of production.
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04-20-14, 07:52 AM
#8
Super Moderator
partly because on german cars in particular there's widely available options to upgrade the software or 'chip' for more boost, different performance characteristics, etc.
but no third party has ever done this for a toyota. my understanding is the software is encrypted and hasn't been 'cracked'.
but no third party has ever done this for a toyota. my understanding is the software is encrypted and hasn't been 'cracked'.
Last edited by bitkahuna; 04-20-14 at 08:42 AM.
04-20-14, 08:26 AM
#9
I'm not impressed one bit about this engine, or similar turbo 4 bangers from the competition. For instance Acura introduced a turbo 4 with almost identical specs nearly 10 years ago in the first gen RDX - but smartened up with the new RDX and switched back to a proper NA V6. I haven't personally driven the first gen RDX, but I've driven a BMW X3 with turbo 2.0 and similar power output - and I hated everything about it. The engine sounds and feels like a 4 banger, there's terrible turbo lag, and even once it starts pulling its no better than a an average V6. I understand the fuel economy portion, but these new turbos usually score great on EPA tests, but in real life they gulp gas like a drunk elephant. 
That being said, 2.0 turbo BMWs are everywhere, so apparently people don't care about the downsides. I guess kudos to Lexus for offering it, hopefully it works out for them as well.
That being said, 2.0 turbo BMWs are everywhere, so apparently people don't care about the downsides. I guess kudos to Lexus for offering it, hopefully it works out for them as well.
04-20-14, 08:35 AM
#10
Pole Position
To ensure Lexus quality and performance, the new turbo engine has been tested for more than 1 million kilometers.
04-20-14, 08:37 AM
#11
Lexus Champion
A while back CR had some info showing that 20% of the small turbos tested missed their EPA estimates by 10% or more.
50% of hybrids missed theirs by 10% or more. In general, Toyota/Lexus hybrids did better than most.
10% of conventional gas engines tested missed theirs by 10% or more.
In the write up they agreed that both hybrids and small turbos require certain driving techniques to maximize fuel efficiency.
50% of hybrids missed theirs by 10% or more. In general, Toyota/Lexus hybrids did better than most.
10% of conventional gas engines tested missed theirs by 10% or more.
In the write up they agreed that both hybrids and small turbos require certain driving techniques to maximize fuel efficiency.
04-20-14, 08:57 AM
#12
I'm relying on the experts in this forum,
Does this engine require a high pressure fuel pump for the direct injection?
How many Lexus engines utilize high pressure fuel pumps?
I'm afraid this could be the Achilles heel from recent experience.
Does this engine require a high pressure fuel pump for the direct injection?
How many Lexus engines utilize high pressure fuel pumps?
I'm afraid this could be the Achilles heel from recent experience.
04-20-14, 09:09 AM
#13
Super Moderator
Direct Injection by its very definition requires a high pressure fuel pump. You can't get 2,000 psi of fuel rail pressure without one. A standard fuel pump would deliver zero fuel (or very close to zero) into the combustion chamber when the injector pulsed at the end of the compression stroke.
04-20-14, 09:25 AM
#14
Lexus Test Driver
Cue all the people who hates the idea of a turbo 4 banger before but will now think it's a great idea.
Anyways, count me in the group that prefers a V8 but settled for a V6.
Sent from my Nexus 4 using IB AutoGroup
Anyways, count me in the group that prefers a V8 but settled for a V6.
Sent from my Nexus 4 using IB AutoGroup
04-20-14, 09:30 AM
#15
Don't forget, its not just the pump - its also the injectors, the fuel lines and all the seals that go with it. And the engine itself is working at higher compression, with more complex EGR, Catalytic and exhaust systems. These cars simply will not go problem free for 150k miles like old Lexus, and you certainly don't want just any mechanic working on these systems.