RX reveal possible 6th gen power levels?

[Jayhawk5G]

The 2016 Lexus RX is more of everything [w/video]

Reports that the new RX will use a 3.5 rated at 300hp, "Under the RX 350's hood is an upgraded and more powerful 3.5-liter V6 aiming to deliver 300 hp with direct injection."

#noaprilfools

 

[TOY2G]

The 2016 Lexus RX is more of everything [w/video]

Reports that the new RX will use a 3.5 rated at 300hp, "Under the RX 350's hood is an upgraded and more powerful 3.5-liter V6 aiming to deliver 300 hp with direct injection."

#noaprilfools

extra 30HP. I wonder if I can do something to my RX350 to get that.... Our Hybrid RX seemed to have more power than our new RX350, but i suspect it was just because the electric motors were instant.

 

[Jayhawk5G]

extra 30HP. I wonder if I can do something to my RX350 to get that.... Our Hybrid RX seemed to have more power than our new RX350, but i suspect it was just because the electric motors were instant.

I'm wondering if this is with/without the atkinson cycle? The RX is pairing it with an 8-speed auto, but I imagine most around here would be happy with a 300hp/6-speed with better mpg than current. I would certainly be looking to upgrade to an SR5 4X4 Premium with that powertrain.

 

[SouthernSS]

Lexus has had the 2GR-FSE out for nearly 10 years that already produced 305hp and 278ft/lbs. It combines traditional fuel injection and direct injection. Im not understanding what the difference here is....

 

[Jayhawk5G]

Lexus has had the 2GR-FSE out for nearly 10 years that already produced 305hp and 278ft/lbs. It combines traditional fuel injection and direct injection. Im not understanding what the difference here is....

2015 Lexus RX used a 2GR-FE w/o direct injection making 270/248, it's found in a number of Toyota applications. They have added DI to this engine, and are reporting 300hp. It is hitting at roughly the same time as the new Tacoma with a 3.5 DI Atkinson-cycle, that has not had specs reported. Many have assumed the 3.5 Atkinson will find it's way into the 6th gen 4Runner.

There may not be a difference or the RX may now be using the 3.5 Atkinson from the Tacoma... and thus may be shedding some light on what power figures to expect?

Edit: 2GR-FXE is the only atkinson-cycle DI 3.5 in use now and it's only been used as part of a hybrid powertrain which the new Tacoma is not. We have no real numbers on a non-hybrid atkinson.

 

[Jetboy]

Lexus has had the 2GR-FSE out for nearly 10 years that already produced 305hp and 278ft/lbs. It combines traditional fuel injection and direct injection. Im not understanding what the difference here is....

I think this is just putting that motor in the RX. Same engine is also going to the Tacoma. I expect the 4runner to get a similar update for the next round. Although it may be possible the 4runner gets a 4.0L version? Either way - if you combine it with either the 6 or 8speed, it's a great combo. Our RX350 is plenty peppy with the extra low 1st gear and 270hp.

 

[SouthernSS]

I dunno though, I believe the 2GR-FSE is an all aluminum block, and they dont typically use that for a truck platform.

 

[JeremyB]

There may not be a difference or the RX may now be using the 3.5 Atkinson from the Tacoma... and thus may be shedding some light on what power figures to expect?

Either the new RX is using the 'new' 2GR engine or they're going to put the 2GR-FSE in it. I doubt Toyota would add another 2GR variant to their lineup.

Edit:
There are currently 5 variants:

2GR-FE Dual VVT-i
2GR-FSE Dual VVT-i D4S
2GR-FXE Dual VVT-i
2GR-FXE Dual VVT-i D4S
2GR-WUT Dual VVT-I D4S

I'd guess the 2GR-LOLWUT (the new one) replaces the 2GR-FE and eliminates the non-D4S 2GR-FXE, since that engine will be giving up 30hp to the 2GR-WUT that would be in non-hybrids. It may very well replace the 2GR-FSE since they both should have very similar performance and the 2GR-WUT will give better mpg.

 

[SouthernSS]

Considering that they use the 2GR-FSE in their new rc350, it wouldnt surprise me one bit that they've decided to just shoehorn that motor into whatever they could.

 

[Jayhawk5G]

Either the new RX is using the 'new' 2GR engine or they're going to put the 2GR-FSE in it. I doubt Toyota would add another 2GR variant to their lineup.

There are a lot of questions about the the new 3.5 Atkinson, we really know nothing about it at this point other than displacement and that it uses DI with an atkinson cycle.

The atkinson cycle is designed to reduce the carbon buildup from the DI. So it seems it will be the direction Toyota moves in to gain the DI benefits while keeping Toyota reliability in the long term.

I made this thread as speculation. The RX is hitting at roughly the same time as the Tacoma, both are now using a 3.5 DI, Toyota likes to share platforms, and the reports are the RX is getting a 30-40hp increase. It may or may not be connected.

 

[SouthernSS]

The addition of the Atkinson cycle is logical, as the IS250 had SERIOUS issues with carbon build up by not allowing the fuel to wash over the valves and clear out the carbon. I still dont really understand all the time and money invested in making a direct injection motor that still doesnt out produce their 10 year old 2GR-FSE, but what do I know.

 

[JeremyB]

The atkinson cycle is designed to reduce the carbon buildup from the DI. So it seems it will be the direction Toyota moves in to gain the DI benefits while keeping Toyota reliability in the long term.

I've read the D4S uses port injection to reduce carbon buildup from the DI. You have any links about the Atkinson cycle doing so?

 

[Jayhawk5G]

I've read the D4S uses port injection to reduce carbon buildup from the DI. You have any links about the Atkinson cycle doing so?

Looked into this and you are right. The D4S reduces carbon build-up, the atkinson effects mpg under cruising/light load.

It makes me wonder though if the RX was just going to get the 2GR-FSE, then why wouldn't they just state that. All the articles I have read imply the 2GR-FE is being upgraded and DI is being added, this is what led me to believe it may be using the same atkinson cycle as the Tacoma?

 

[Whiplash Willy]

The 6th Gen will be most likely getting the 3.5L V6 that the 2016 Tacoma has, since both use truck engines, have longitudinally mounted engines, and have shared the same drivetrain in the past.

The RX uses a traverse mounted car engine, so I don't' think it is going to give us much insight to what 6th gen's engine and specs will be.

I am eagerly awaiting more details on the 2016 Tacoma, they haven't given use anything new since January. Hopefully we get more info on it before this Fall when it is released.

 

[NoDak]

hp is nice, I want to know the TQ numbers

 

[hearno]

I guess I'm the only one here that's happy with the engine/trans in my 5th gen. I just want reliable, if it costs me 30-50 HP, I could care less.

 

[Jetboy]

I think there's some misinformation in this thread.

Atkinson cycle has relatively little to do with the carbon build up. You need direct injection to have akinson cycle, so atkinson cycle engines like all other direct injection engines are somewhat related to carbon build up - but not because of the atkinson cycle part. Carbon build up is a result of direct injection lacking any fuel flow over the intake valves. The intake valves in foreign models without EGR and most importantly PCV systems do not flow dirty air over the intake valves. The EPA compliant vehicles - with EGR and PCV systems flow oil mist over the intake valves. With no fuel flow to clean the carbon off, they build up carbon over time.

The D4S system solves this by using 12 injectors - 2 per cylinder. One upstream in the intake plenum/runner and one downstream as direct injection. The periodic use of the upstream injection solves the carbon build up. Atkinson cycle is neither here nor there with respect to carbon build up. The 4Gr in the IS250 has 7 injectors. It has an additional 7th injector for cold starts - to warm the engine AND to provide fuel to the catalytic converter to reach proper operating temps (which is why counter-intuitively leaning fuel mix from factory settings increases emissions - ...). Anyway I owned an IS250 for 7 years. Never had a hiccup. The primary cause is PCV circulation and a catch can solves it. Additionally it's relatively rare in cold weather. Most issues are where the 7th injector rarely is utilized like California for example.

Atkinson cycle in this case is the use of variable exhaust valve duration to shorten effective compression stroke. The piston travels roughly 1/3 of the way up the cylinder before the exhaust valve closes, then gas is injected and spark fires. This burns more efficiently by having a long power stroke relative to compression stroke. In a sense it's like a reverse turbo. Where a turbo creates the effect of variable displacement increasing effective displacement, atkinson cycle is essentially variable displacement shrinking engine effective size with the added benefit of significantly increased thermal efficiency.

I suspect that all GR engines will be D4S and Atkinson cycle in the next generation. It's a no-brainer once you've done the R&D to program the operation of the various parts of the system.

Edited for some greater technical accuracy.

 

[JeremyB]

It makes me wonder though if the RX was just going to get the 2GR-FSE, then why wouldn't they just state that. All the articles I have read imply the 2GR-FE is being upgraded and DI is being added, this is what led me to believe it may be using the same atkinson cycle as the Tacoma?

Possibly just lack of cohesion in the marketing department. Time will tell.

The 6th Gen will be most likely getting the 3.5L V6 that the 2016 Tacoma has, since both use truck engines, have longitudinally mounted engines, and have shared the same drivetrain in the past.

The RX uses a traverse mounted car engine, so I don't' think it is going to give us much insight to what 6th gen's engine and specs will be.

If Toyota wanted to, they'd make the new 2GR usable in both longitudinal and transverse applications, so the RX and Tacoma could use the same basic engine.

 

[Randyman...]

{snip}

Learned a lot from your post! :hatsoff:

 

[gm350reratliff]

hp is nice, I want to know the TQ numbers

And not just the number, at what rpm do we get that number.