how can i tell if its a vvti 1uz-fe??

[zen]

theres one been offered,low millage from a 1999 ls400, i dont know if its a vvti..how do i tell??(and i dont want to give the game away to him as the price will go up, i have pic)

it does not come with the ecu...will my 1991 ecu run it??(bet it wont)

thanks

 

[Lextreme II]

VVTi intake facing the fron and non vvti intake facing the right side. The 1991 ECU will not work on the VVTi. I have an extra VVTi ecu I purchased that I can sell

 

[cjsupra90]

If it is truely a 1999 engine, then it is definitly a VVTi engine. Like david said, look at the intake that is a dead give-a-way.. Also, IIRC all VVTi engines had alloy timing belt covers where the none VVTi engines had black plastic belt covers...

 

[zen]

thanks for your replys...

then it is a non vvti..(black plastic cam belt covers and intake on side of engine facing to side of car).so man stating its 1999 and 40000miler is "misinformed"(shall we say)

think i will stay well away and stick with the one i have..(non vvti)

thanks again

 

[Bazildup]

Hi guys,
May I ask a few question on this subject?
1. When was the production years of this 4.0 VVTI motor?
2. was it available in a front sump configuration?
3. HP ratings and where did it make power?

 

[Lextreme II]

Engine cover also another sign but 1995-1997 also has the cover too. Check for the intake direction. Secondly, you should see COP on the VVTi.

Bazilup,

I answered your PM.

 

[JBrady]

Hi guys,
May I ask a few question on this subject?
1. When was the production years of this 4.0 VVTI motor?
2. was it available in a front sump configuration?
3. HP ratings and where did it make power?

USDM
1998 - 2000
GS400/Arista 300hp @ 6000rpm, 310tq @ 4000rpm
LS400/Celsior* 290hp @ 6000rpm, 300tq @ 4000rpm
SC400/Soarer** 290hp @ 6000rpm, 300tq @ 4000rpm

*GS an LS appear identical except the GS has slightly better exhaust system which may be the only reason for power difference.
** SC has single tube exhaust manifolds and secondary exhaust similar to LS and is probably over-rated with a more accurate power of 280hp which seems to be confirmed by actual track times.

 

[cjsupra90]

John, that you know of, has anyone actually put a VVTI engine on an engine dyno to see what the true power is?

I've seen many cars with engine dyno (not chassis dyno) proven power run consistant times that showed a different power based on track time calculations. Im not saying that they are or are not making the quoted 290 or track time calculated 280, but there are too many variables (especially for 10hp) in my oppinion like incorrect weight, bad launch, excessive wheel spin, bad shifts and so on. 1/10 on an ET is typically worth about 10hp and having a car that is not setup perfectly (i.e. suspension alone) can easily throw you off 1/10 or more. Yes, ET and MPH will get you close but unless the car is setup perfect and runs a perfect race, the calculated number are close but not dead on and 10hp could easily be in the realm of being correct, but again not dead on. Now if the qouted number was 290 and yet the car ran consistant times / MPH's that equated to say 240 then yeah I would easily agree that the quoted numbers are incorrect or there is a problem with the car as that is a substantial differance.

 

[Bazildup]

1UZ VVTI

have anyone got pictures of these engines?

 

[ed_ma61]

vvti make a buttload more power than non vvti stock for stock when tuned with a/m ems. 205rwkw vs 175rwkw enough to convince?

 

[Bazildup]

Ed,
I'm very keen on getting one. I just need to be very sure that I get the right engine. The guys like to bs you into buying there stuff they can't sell to anyone else.
I would rather be 110 percent sure than to make the mistake of buying the older engine.....

 

[MWP]

Early non-VVTI 1UZ:

VVTI 1UZ:

Plenty of differences... quite easy to tell them apart.

 

[Lextreme II]

Here is a picture of a 1999 SC400 VVTi engine. http://www.lextreme.com/forums/showthread.php?t=11309&highlight=VVTi Ignore the first two pictures. The engine cover should say VVTi also.

 

[ed_ma61]

mwp - thats a 2uz, but i wont tell if you dont 1uz is basically the same to look at, the manifold is a bit shorther tho

 

[Bazildup]

Thanks very much guys. Will start the hunt for one of these engines asap...

Just one last question.....Is the exhaust manifolds the same as the old 1UZ?

 

[MWP]

mwp - thats a 2uz, but i wont tell if you dont 1uz is basically the same to look at, the manifold is a bit shorther tho

Hah, oops, i thought it did look a bit tall, but im not familiar enough with the 2UZ, 3UZ to know it was one of those.

 

[Lextreme II]

Hah, oops, i thought it did look a bit tall, but im not familiar enough with the 2UZ, 3UZ to know it was one of those.

Yup.. i saw that too... that is why i post a REAL VVTi 4.0. 2UZ has taller intake manifolds and you can also see the black color block (Iron).

 

[JBrady]

Thanks very much guys. Will start the hunt for one of these engines asap...

Just one last question.....Is the exhaust manifolds the same as the old 1UZ?

No, the LS and GS400 use dual tube tri-y type manifolds. Not great but better than the SC400 using the single tube log type manifold. Lexus went back to the single tube in 2001 on all apps.

 

[MWP]

Yup.. i saw that too... that is why i post a REAL VVTi 4.0.

Where, i dont see any other photos in here?

1UZ VVTI with the rather silly plastic cover: