IS200t tune
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Joined: Jan 2017
Posts: 519
Likes: 93
From: az
Our 4 cylinder engine has a total of 8 injectors (4 low pressure port injectors and 4 high pressure direct injectors). Each injector, regardless of type, is controlled electronically via the ECU. The port injectors are located pre intake cylinder valve outside of the combustion chamber, whereas the direct injectors are located post intake valve and their nozzles squirt directly into the combustion chamber. Despite what you think, there is no redirection to different ports. Now remember that these injectors are electronically controlled? We’ll if you payed a little more attention to detail you would have seen that I posted a fuel staging graphic, made available by Toyota, which represents when our different type of injectors are activated based on speed and load conditions. At the highest load conditions, only direct injectors are in use NOT port injectors. Now do you see why upgrading port injectors will do little for top end power? Maybe TTI or JRC already has a solution for this and that would be great leading me to buy those.
On a side note OVTunes poor dyno numbers could very well be lack of experience with the platform and is not a direct reflection of their tuning product. I’m excited because it’s yet another product on the market pushing development of our platform.
Last edited by IS200TFOWL; Jun 12, 2018 at 07:16 PM.
Driver School Candidate
Joined: Apr 2016
Posts: 20
Likes: 5
From: Hawaii
8 injectors lol, there will be no lack of fuel with an upgraded fuel system. That’s insane they’re 8 injectors, this is cool. I was hoping upgrading only the DI thinkin that would be enough especially if injectors are expensive. Maybe they’re will be some injectors maybe they’re won’t? What are we trying to say in the end? We can say JRC past 330whp at 19.5 psi becomes inefficient due to the modded compressor tapping out or the fuel system can’t keep up. Maybe jrc isn’t really doing 24 psi @345whp. To those wanting to talk about OV then just buy it. Sounds like a lot of you are on the hook just do it and find out for yourself. To spend that kind of money on something not proven sounds ridiculous. We need more people testing out JRC because they have something worth talking about plus they have dyno proof. Spend $3100 on a OV master tune suite without proven results or 3k on an actual 300+whp turbo package from jrc.
Toyota AR series engine
Hopefully you’ll see what a few of us have been trying to explain to you. 8 injectors does not equate to an abundance of fuel. It’s designed for fuel efficiency, emissions, valve/port cleaning and cylinder cooling amongst other things, not performance. The only reason I brought up OV is because they clearly advertise full D-4ST control which would be the answer to one of our limiting factors.
Last edited by 808NXF; Jun 12, 2018 at 09:34 PM.
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Racer
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
8AR-FTS
"A 2.0 L turbocharged direct-injected member of the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle. First debuted in the Lexus NX200t.[15] Power output in the 2015 NX200t is 175 kW (235 hp) at 4,800 - 5,600 rpm and 350 N⋅m (258 lb⋅ft) at 1,650 - 4000 rpm. The 8AR-FTS engine had Lexus’ ESTEC D-4ST (Economy with Superior Thermal Efficient Combustion Direct injection 4-stroke with Turbo) fuel injection. With separate twin injectors for both direct and port injection, ESTEC D-4ST could perform high-pressure direct injection into the cylinder and conventional intake port injection, or direct cylinder injection only, according to engine speed.[16] Power output in some applications, e.g. Lexus IS 200t XE30, Lexus GS 200t and Lexus RC 200t is bumped up by 5 kW in the same rev range but torque remains the same."- Wikipedia
"A 2.0 L turbocharged direct-injected member of the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle. First debuted in the Lexus NX200t.[15] Power output in the 2015 NX200t is 175 kW (235 hp) at 4,800 - 5,600 rpm and 350 N⋅m (258 lb⋅ft) at 1,650 - 4000 rpm. The 8AR-FTS engine had Lexus’ ESTEC D-4ST (Economy with Superior Thermal Efficient Combustion Direct injection 4-stroke with Turbo) fuel injection. With separate twin injectors for both direct and port injection, ESTEC D-4ST could perform high-pressure direct injection into the cylinder and conventional intake port injection, or direct cylinder injection only, according to engine speed.[16] Power output in some applications, e.g. Lexus IS 200t XE30, Lexus GS 200t and Lexus RC 200t is bumped up by 5 kW in the same rev range but torque remains the same."- Wikipedia
Advanced
Joined: Jan 2017
Posts: 519
Likes: 93
From: az
I encourage you to read up on the D-4ST fuel system and the 8AR-FTS here
Toyota AR series engine
Hopefully you’ll see what a few of us have been trying to explain to you. 8 injectors does not equate to an abundance of fuel. It’s designed for fuel efficiency, emissions, valve/port cleaning and cylinder cooling amongst other things, not performance. The only reason I brought up OV is because they clearly advertise full D-4ST control which would be the answer to one of our limiting factors.
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Thanks for sharing Mesh.
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Joined: Jan 2017
Posts: 519
Likes: 93
From: az
98 octane not RON. The is350 is starting to put down some impressive numbers with the supercharger. If the 200t had the same opportunity with turbo swap then we would still have the upper hand. We are more light weigth and our torque curve will destroy it. Imagine an aftermarket turbo that hits 25-30psi no problem. Let’s hope our fuel system can keep up. I think at 25psi top end, actually 25psi, then I would think that’s good for 400+whp
Thread Starter
Racer
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
JB4 is off to a new home. I've been running the stock tune with my current mods and i can definitely notice the difference. Boost would barely pass 1.5bar mark and taper. Waiting for Tony to send me tools to load my TTI Stage 2+ back on.
Driver School Candidate
Joined: Jun 2018
Posts: 1
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From: florida
We all know it but can we fix it????
Hello guys, I need help asap, just bought this 2016 lexus 200t and I am aware that the turbo lag is annoying but other than that I would like to know if there is a way to get rid of it.. maybe a turbo swap, computer swap... I would like to know if there is any possible way to not have this problem no more.. in love with the casr but I am car huy and dont want to have a car with this issue for life!! if anyone really know please inform me I'm about to turn it back
thanks again!!!!
thanks again!!!!
Lead Lap
Joined: Dec 2015
Posts: 527
Likes: 138
From: Dubai
Hello guys, I need help asap, just bought this 2016 lexus 200t and I am aware that the turbo lag is annoying but other than that I would like to know if there is a way to get rid of it.. maybe a turbo swap, computer swap... I would like to know if there is any possible way to not have this problem no more.. in love with the casr but I am car huy and dont want to have a car with this issue for life!! if anyone really know please inform me I'm about to turn it back
thanks again!!!!
thanks again!!!!
1) Downpipe
2) Charge Pipe
3) Muffler delete
4) Intake
5) TTI Stage 2+ tune
These should make u waaaay much happier with the spool and the car
i got some parts for sale if ur interested PM me
Thread Starter
Racer
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
Hello guys, I need help asap, just bought this 2016 lexus 200t and I am aware that the turbo lag is annoying but other than that I would like to know if there is a way to get rid of it.. maybe a turbo swap, computer swap... I would like to know if there is any possible way to not have this problem no more.. in love with the casr but I am car huy and dont want to have a car with this issue for life!! if anyone really know please inform me I'm about to turn it back
thanks again!!!!
thanks again!!!!
Are you talking about turbo lag or throttle delay? As of now the throttle delay issue is slightly improved with a re-flash tune. We are very limited on tuning software for our ECU, but i do think we will see more in the future which can address these issues.
Thread Starter
Racer
Joined: Feb 2012
Posts: 1,729
Likes: 409
From: South FL
What am i seeing??