whlkev

Per request, I've taken my engine cover off to show what's underneath, I did my research and I was maybe wrong about the GS460 being direct injection (I can find about 3 sources online stating it is, but they were probably just quoting on the LS460 and misleading press release from Lexus didn't help)

Here are the differences:

• GS460 has 32hp & 28lb-tq less than the LS460
• GS460 has single air intake setup compared to the dual on the LS.
• GS460 (1UR-FE) vs LS460 (1UR-FSE)
• GS460 has Sequential Multiport Fuel Injection (SFI)
• 1UR-FE is based on the 1UR-FSE but lacks the gasoline direct injection D-4S technology.

source: Toyota UR Engines

Pictures:
LS460 Engine (found it online, didn't take this)


GS460 Engine (mine)


HOWEVER, Lexus press release still states GS460 has 1UR-FSE, which i now believe is a typo and could explain why I never hear this "infamous" direct injection noise.

Unless we get confirmation from Lexus engineer, I guess this is still up for debate. Hope this at least helps to explain the lack of full hp from the flagship LS.

kyang91

iTrader: (5)

great information Kev thanks......

GFerg

Very cool!! The engine actually looks compact. Those huge dual intakes on the LS are deceiving.

flipside909

It's a 1UR-FSE. Look at all the Emissions and Vacuum routing tags under the hood.

whlkev

ok then we are back to square one

rominl

iTrader: (4)

so maybe it's indeed due to space issues that they can't put dual intake in the gs460?

LexFather

First Kev, thanks for the pics!!!

Now look at the difference in the stock air intake on the LS compared to the GS. That looks like the same GS air filter box the GS 400 had.

Also is it just me of 1/2 of Kev's GS engine bay painted white in front? Its usually black. That is odd, no?

I am comparing where the oil cap is and the battery placement. I guess the GS engine bay is not large enough for both dual intakes without another possible "hood bulge".

This is very very interesting.

Are the LS/GS 460 compressions the same? I wonder if you gave the GS 460 a bigger intake/Ram Air/forced some more air into the engine would you have a significant gain in power?

whlkev

LS460 = 11.8:1
GS460 = 11.8:1 on website and 10.5:1 on the press release.. sigh I am losing faith on Lexus released info.

LexFather

Ryan, who does Lexus have so much conflicting info for the GS 460? It is confusing.

rominl

iTrader: (4)

believe me ryan was frustrated too, coz' i also bugged him.

personally i would trust the info on their website more at this point, rather than their press months ago.

looking at the engine bay, yes, i think it doesn't have enough room for dual intake. it's funny coz' i have both cars in the garage and while the ls460 is larger, it's amazing how much more space the engine bay has huh

the design of the gs460 intake looks like the old gs400/430. but it seems like the pipe is larger than before (understandable).

Lexus GS3

iTrader: (2)

Maybe its a black LS460

The G Man

My guess is that they had to modified the LS's engine to get it inside the GS, hance losing HP.

whlkev

i feel like i am getting jipped

dunnojack

i noticed that too.

it looks very very sloppy.

tC350

I posted the difference between the two engines the other day in the other thread about the GS460 and was shot down......I think this deserves a big I TOLD YA SO!!!