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Nice ITBs on a 1UZ-FE

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    • Jan 30, 2007 1:34:42 pm
    Click here to see Video

    Lexus motor.
    • Jan 30, 2007 4:40:01 pm
    SWEET!.... what car is the 1uz v8 in? the new LS?

    god knows i would't have open ITBs on my LEXUS (if i had one). i never understood why people run their ITB cars without the intake manifold.... can you imagine all the dust particles that got sucked in during that short little rev....
    • Jan 30, 2007 4:41:43 pm
    EXACTLY! I've always wondered what would happen if a mouse got in your hood and in the TB. Start it up and there goes your engine.....and the mouse.


    yeah 95-00 LS 400 engine.
    • Jan 30, 2007 5:07:48 pm
    I thought ITBs had filters inside 'em?
    • Jan 30, 2007 5:19:08 pm
    You can get filters for them but most of the time, they are wide open.
    • Jan 31, 2007 6:46:48 am
    Do ITBs make that much of a difference in performance? I've seen some civics and tegs with these...
    • Jan 31, 2007 9:06:11 am
    It all depends on your total setup. Just adding ITBs isn't going to jump you 100 hp or anything...haha..............But, they can help in a lot of low end gains due to the direct path of air into the intake manifold rather than traveling through the air intake and spliting off a small amount of air for all the cylinders. This way, all cylinders get the max amount of air possible.
    • Jan 31, 2007 9:29:24 am
    Vicious wrote:
    I thought ITBs had filters inside 'em?


    nope. they are open. they are just throttle bodies (just like the TB on our car) except each intake port gets its own throttle body and they are tuned to provide optimum performance. The velocity stacks serve to increase the speed of air flow, so not only is there no restriction, its almost like boosting in that it really does improve throttle response, and power through out the range.

    one quick correction to the ^^^ post. The ITBS feed directly into the cylinders...not the intake manifold.

    You can get a manifold that encases the ITBS so they only draw in filterd air from the intake system. This manifold does not have runners, but rather it is just a large open chamber that bolts up to the intake piping. The ITBs then draw in air from this chamber. this also is a way to keep the intake temps cooler, by preventing the ITBS from sucking in hot air from the engine bay.

    • Jan 31, 2007 9:34:14 am
    yup, sorry.........my mistake
    • Jan 31, 2007 5:40:15 pm
    hmm.. can't wait till ITBs come out for the 2az-fe
    • Jan 31, 2007 7:16:03 pm
    Good luck with that conversion. Drive by wire ITBs.....that would be a remarkable engineering piece.
    • Feb 01, 2007 10:56:44 am
    Web wrote:
    Good luck with that conversion. Drive by wire ITBs.....that would be a remarkable engineering piece.


    i don't really think it would be that great of an accomlishment...would it?

    I would guess that the 1uz-fe in the OP is DBW, no? its a lexus motor... could be wrong. Google junkies, go get em!
    • Feb 01, 2007 12:36:47 pm
    Yeah, it's a lexus motor. I guess it could be but that's still a big conversion. I would think to do individual sensors per TB rather than one main one and a cable connecting them.
    • Feb 01, 2007 3:19:03 pm
    Web wrote:
    Yeah, it's a lexus motor. I guess it could be but that's still a big conversion. I would think to do individual sensors per TB rather than one main one and a cable connecting them.


    i would think it would be one sensor to receive the throttle signal from the throttle position sensor, and then like an actuator or solenoid to open the ITB's...
    • Feb 01, 2007 3:20:10 pm
    Yeah, but my way would be the hardest..........hahahahahahahhaha
    • Feb 01, 2007 4:30:13 pm
    okay, you win.

    but i still love that vid of the 1uzfe w/ ITBS... looks awesome. if only i had a speaker on my computer at work so i could hear it rev...

    and if only i wasn't on dial up at home so i can't watch vids..
    • Feb 01, 2007 4:31:22 pm
    Damn, that blows. No headphones or anything?
    • Feb 01, 2007 5:00:30 pm
    nah, i'm at work; answering phones and taking orders. So i really need to pay attention. Plus, i don't want to piss my boss off with a bunch of tire screeching and exhaust tone clips... the fact that i spend all day on scion forums and myspace is risky enough...
    • Feb 01, 2007 6:02:41 pm
    hahaha, understandable
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