Engine Swap ...

[serialk11r]

Wow okay I should be more careful about trusting Wikipedia. They say the 4GR-FSE had D4-S, but the Lexus website says it doesn't lol.

As for the 2GR, I can't find anything on the internet about known issues. Sounds like a nice engine to me.

[WingsofWar]

Originally Posted by serialk11r

Wow okay I should be more careful about trusting Wikipedia. They say the 4GR-FSE had D4-S, but the Lexus website says it doesn't lol.

As for the 2GR, I can't find anything on the internet about known issues. Sounds like a nice engine to me.

if you go to lexus forums 2 big things about those engines.

1. no large aftermarket support
2. carbon build up on low mileage engines

[serialk11r]

I thought the carbon buildup was on the 4GR engines...they have direct injection, but no port injection.

[Allch Chcar]

Originally Posted by WingsofWar

if you go to lexus forums 2 big things about those engines.

1. no large aftermarket support
2. carbon build up on low mileage engines

Originally Posted by serialk11r

I thought the carbon buildup was on the 4GR engines...they have direct injection, but no port injection.

Whoa there cereal.
The ones with port injection shouldn't have the carbon issues. Although I have actually seen some cases of carbon buildup on Port injection.

And looky lexus IS specs. The DI only 2.5L(4GR?) gets 12.0 SCR while the D4-S 3.5L(2GR?) gets 11.8:1. People wanting a decent turbo engine will probably want <10.5:1 or so going off the Mazdaspeed3 setup.


BTW, 0-60mph in <8 seconds for base $33k 3400lb sedan. whoo boy that's fast and affordable. Now I'm feeling particularly violent just thinking about all the people whining about this car being slow and ugly. I'm going to eat some dead animals/plants and then kill some sick people(L4D2) to vent my frustration.

[WingsofWar]

Originally Posted by Allch Chcar

Whoa there cereal.
The ones with port injection shouldn't have the carbon issues. Although I have actually seen some cases of carbon buildup on Port injection.

And looky lexus IS specs. The DI only 2.5L(4GR?) gets 12.0 SCR while the D4-S 3.5L(2GR?) gets 11.8:1. People wanting a decent turbo engine will probably want <10.5:1 or so going off the Mazdaspeed3 setup.


BTW, 0-60mph in <8 seconds for base $33k 3400lb sedan. whoo boy that's fast and affordable. Now I'm feeling particularly violent just thinking about all the people whining about this car being slow and ugly. I'm going to eat some dead animals/plants and then kill some sick people(L4D2) to vent my frustration.

Sorry i should have noted that owners have expressed dissatisfaction in the lexus forums with the carbon buildup and no aftermarket support. Clublexus.com might offer some answers. Im also in those forums when i owned a sc300 a few months ago.

port injection is only present are certain engine conditions. At mid-high RPMS Direct injection comes on only.

Both D4-S engines and DI engines have carbon issues, while D4-S can see more milage before you have to get the heads serviced by lexus and is covered under warrentie, some owners have extended warrenties because of this. DI only engines especially turbocharged/supercharged equipped cars build up soot reallly quickly. I read somewhere that 400hp 2GR-FSE Supercharged variant found in Japans Toyota Mark X has a bad shelf life.

[serialk11r]

From the other threads, I am fairly sure that port injection is on most of the time, it only goes off at near max. throttle for maximum torque. At other times it's a mix to make the distribution of fuel in the cylinder as even as possible, to save fuel/emissions since these engines run stoichiometric A/F ratios for emissions. At mid rpm if the throttle is partially closed this should still apply. Maybe someone else can correct me if I'm wrong...
Of course if you only drive a D4-S engine say, on the track, you're mostly using just the direct injector, and that would be a problem.

@Allch Chcar what's up? I don't get the "whoa there cereal"...

[WingsofWar]

Originally Posted by serialk11r

From the other threads, I am fairly sure that port injection is on most of the time, it only goes off at near max. throttle for maximum torque. At other times it's a mix to make the distribution of fuel in the cylinder as even as possible, to save fuel/emissions since these engines run stoichiometric A/F ratios for emissions. At mid rpm if the throttle is partially closed this should still apply.

Your absolutely right! and based on logic that we should not be seeing carbon build up because of the port injection...but unfortunately its not true IRL. owners are still both D4S and DI engines are seeing similar early carbon buildups, with D4S being the lesser of two evils.

Its not entirely clear why they are getting carbon, but they do know that DI plays a major roll in it.

[Allch Chcar]

Originally Posted by WingsofWar

Sorry i should have noted that owners have expressed dissatisfaction in the lexus forums with the carbon buildup and no aftermarket support. Clublexus.com might offer some answers. Im also in those forums when i owned a sc300 a few months ago.

port injection is only present are certain engine conditions. At mid-high RPMS Direct injection comes on only.

Both D4-S engines and DI engines have carbon issues, while D4-S can see more milage before you have to get the heads serviced by lexus and is covered under warrentie, some owners have extended warrenties because of this. DI only engines especially turbocharged/supercharged equipped cars build up soot reallly quickly. I read somewhere that 400hp 2GR-FSE Supercharged variant found in Japans Toyota Mark X has a bad shelf life.

Now that is even more discouraging regarding DI. I am definitely going to be picky about my fuel picking the ones with more detergents and I will probably be running the maximum safe amount of alcohol too. Alcohol is a good solvent and it helps reduce carbon buildup, how much .

I will be monitoring my intake to the valves whenever I make the switch to DI. That goes on my list of things to monitor like o-rings...

Originally Posted by serialk11r

From the other threads, I am fairly sure that port injection is on most of the time, it only goes off at near max. throttle for maximum torque. At other times it's a mix to make the distribution of fuel in the cylinder as even as possible, to save fuel/emissions since these engines run stoichiometric A/F ratios for emissions. At mid rpm if the throttle is partially closed this should still apply. Maybe someone else can correct me if I'm wrong...
Of course if you only drive a D4-S engine say, on the track, you're mostly using just the direct injector, and that would be a problem.

@Allch Chcar what's up? I don't get the "whoa there cereal"...

I think WoW explained it better now. I was saying don't get too go carried away with the port vs direct injection . Just because they have port injected doesn't mean they still don't have carbon buildup issues. From personal experience.

Originally Posted by WingsofWar

Your absolutely right! and based on logic that we should not be seeing carbon build up because of the port injection...but unfortunately its not true IRL. owners are still both D4S and DI engines are seeing similar early carbon buildups, with D4S being the lesser of two evils.

Its not entirely clear why they are getting carbon, but they do know that DI plays a major roll in it.

Lack of detergents would be my guess. It's a common problem with cheap grade Gasoline regardless of fuel injection.

Either that or these Lexus guys are not giving it enough throttle . This is why Rotaryheads recommend red lining once in awhile, it helps reduce carbon buildup, supposedly .

[Random_Art]

I wonder if regular use of Seafoam would do anything to negate the carbon buildup.

[serialk11r]

Originally Posted by Allch Chcar

Either that or these Lexus guys are not giving it enough throttle . This is why Rotaryheads recommend red lining once in awhile, it helps reduce carbon buildup, supposedly .

Except if you give it more throttle it uses more DI
Wait I shouldn't be laughing if I am interested in someday buying a Toyota car with direct injection...

[Allch Chcar]

Originally Posted by Random_Art

I wonder if regular use of Seafoam would do anything to negate the carbon buildup.

It would be a band-aid but it could work...

[Snaps]

Originally Posted by Allch Chcar

Either that or these Lexus guys are not giving it enough throttle . This is why Rotaryheads recommend red lining once in awhile, it helps reduce carbon buildup, supposedly .

<.<

>.>

I redline my cars probably at least once every time I drive them... And yes... that's including the DD'er

Only when they're up to proper operating temperatures though.

[Allch Chcar]

We are discussing engine swaps in the D4-S thread and D4-S in the engine swap thread...

[quik1987]

So... if someone were to put an EJ207 in this would it be able to keep up with a.....


Cayman R
330hp
2855lbs
$ 66,300


1 Series M Coupe
335hp
3362lbs
$46,135


FT-86 (EJ207)
304hp
~2555lbs
~$ 35,000

Sorry, I was daydreaming.