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Sc400 Conversion To 6 Speed + Turbo?


BlurrySC300
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I used to drive a 95 SC300 5speed...loved it. But I heard some mechanics when I was at my dad's work (Lexus of Austin) saying something about converting the auto tranny to a manual 6 speed in the SC400. My question is..can it be done? Has anyone ever done it before? Seems like it would be ridiculously awesome idea.

Secondly, if it could be converted to manual...would it be possible to turbo/twin turbocharge the engine? Once again, has anyone ever done that?

Just was on my mind and thought i'd spit it out and see what you guys ( and gals) thought.

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Hey whats up, I know that the 1UZ can be twin turboed, David Phan of Lextreme did his LS400 and can be seen at http://www.lextreme.com/tt.html I also know there is a company out there that does bell house matching. You can buy a supra 6 speed and mount it up to the 1UZ i just cant remeber the link it may take some digging to find that again.

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You can use the second gear sensor to fool the auto tranny ecu somehow. There is a company in Australia that sells bellhousing conversion kits for all types of toyota powerplants. I posted the link a while ago. A search should bring it up.

Twin turboing the 1uz in the SC is hard without extensive modification to the engine bay because the physical layout puts the turbos too low for the conventional oil return to function correctly. Then a pump is needed to get the oil back from the turbo. Also, twins make ground clearance an issue. This is from what I understand. It is definitely possible to do, but hard in the zz chassis.

A single turbo is more possible. Still difficult. But potentially easier and more rewarding.

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The tt setup is rumored to be well nicely put a bitc*. And the power gains werent that great. A company in california did a custom setup a while back for a guy. They were only running something like 8-9 psi, so about 4 psi on each turbo. I think the guy pulled 375 ( dont qoute me on that one ) at the wheels, not really that impressive for the money, I have heard a lot of success stories with a S1 trim supercharger though. Rod Millen Motorsports did a similar setup on a GS. I think a supercharger would be your best bet.

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I believe the UZFE engine is designed to be supercharged, more than Turbo charged., although the guys in Japan would probably disagree. A few years back, I read somewhere that a tuner group in Australia supercharged the SC400, and made it clear the hood. When I asked them about the LS400, they wern't really sure if it would.

I think it's worth supercharging.

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