7schulz

What is the most horse power a 1UZ-FE can make NA and still be reliable? I have been looking at building up a hot rod and want a different V8. What got me thinking is Honda makes the V8 that runs the Indy 500 Cars, and my 1UZ-FE runs up to 6000RPM. It's very smooth and good power and with the engineering and design behind the 1UZ-FE I thought it might be a good engine. Also is there a manual tranny that will adapt to it? Does Tremec make anything that will bolt up? What are your guys thoughts? I would like to see a Lexus powered muscle car. Is there a better Lexus option V8 that can be had from a junk yard?

LiCelsior

iTrader: (32)

search, search, and guess what...SEARCH!!! many o many of these topics have been discussed.

7schulz

We get bashed for bring up old threads and we get bashed for new threads. Everything I found in the search said to search.

LiCelsior

iTrader: (32)

search more

building out a 1uzfe can get very costly..upgrading internals for this behemoth adds up in the long run.

yes they do make adapters but currently the popularly used one for the SC400s is for the W58 5speed transmission.

7schulz

See now I know what more to search for. W58 to 1uzfe
https://www.clublexus.com/forums/per...s-of-pics.html
What about a V series trans.

LiCelsior

iTrader: (32)

if u can make an adapter for the V160 then go for it..there MAY be one but im not sure.

spdrcr771

iTrader: (21)

Im going with 1uz vvt-i heads on a 2uz 4.7 block, hoping to make 300rwhp w/no cams & stock ecu. lextreme forum has alot of 123uzfe info.

3UZFTE

Great engine, can be a bit of work to get to be everything you want it to be. Small displacement, not many trans options, requires work to carb, no off the self parts, everything must be fabricated or purchased from a specialist. You will need an adapter for all manual transmission to bolt up. If you are wanting to see the first Lexus powered hot rod, your outta luck, it's been done a few times. I'm, not sure how new you are to Toyota, but Rod Millen did a 32' Ford Roadster V8 with a GS430 VVT-i engine which is the more famous one, but there are countless other people who have thrown the DOHC 32 valve V8 in their rides.

Well since you asked, the V16x is one of the best transmission on the market, imo. However, the cost of it obviously states how effective and good this transmission is. Your looking for atleast $3,500 to put it in your hands, and thats just for the tranny. Once you have the trans, you will need a 1UZ to V16x adaptor, and a special clutch to be able to used your auto flexplate as the flywheel, as well as all the other junk you'd need to run a manual, pedals, hydraulic master and slave, driveshaft, etc.

I would really be skeptical about the stock valvetrain going up to 8k, as they start to choke around 6k, not to mention valve float on stock springs. Along with spinning the valvetrain up that fast, the bottom end needs to be beyond beefed up to get to that point, not to mention one hell of an oil pump/sump system. It isn't the cylinder heads that limit the power of the UZ to an extent, it is all the other things like you mentioned intake and exhaust manifolds, injectors, etc.

Yes, but not really the most accurate, but he does have some information on there, you have to remmeber he is a businessman. He is not a machinist, technician, engineer, etc, etc. I hate to say it though, but the 1.5UZ was done a while back by Ed and the boys over at v-eight.com. Although 300rwhp sounds nice, again I am skeptical that you would see as much as a 75rwhp from .4 liter increase from the 3UZ to the 1.5UZ. As the GS430 tuned at 230rwhp, stock, your going to a heavier block, heavier rotating assembly, 2 bolt mains so on a dyno you won't notice that too much, but when your driving your car it will be heavier so it will take more horsepower to achieve the same goals as before. One way I would compare this is to the Chevy LSx guys, most people who had an LS1 have now purchased a Iron truck LS motor, bored them out to 408, and beefed them up. It can be very similar results, however you are taking stock parts and putting it on a stock block, with no real power adders. Yes, the 1.5UZ is a good idea, but for all that work, why not buy an LS2/3 and put it in there an be at 400hp to start with....? As the saying goes, there is no replacement for displacement... So even with 4.7 liters, your around 289ci, which is what was in like 60's-70's mustangs and Hi-Po cars, now ford has a 427 modular motors, chevy has a 454 sbc, and even dodge has a 426 "hemi", hell even the new 5.0 DOHC V8 puts down close to 450hp out of the foundry and it's NA, it was also built to allow boost in which a supercharge can be fitted in an afternoon, us Toyota/Lexus owners are screwed...

PureDrifter

iTrader: (10)

honestly, unless you up the compression, with the stock ecu and no management, you're prolly not going to be close to that


TTC made a V160 plate, though the whole adapter and clutch assy. was NOT cheap (>$1500-2000) plus the V160 trans plus getting the engine management to not own your face if you're running an OBDII ECU.

W58 conversion kits can be had for ~$1000-1500, but that's complete including the adapter, steel or alum. flywheel, clutch, and everything else needed aside from the cheap trans.

the cams are a big restriction in the 1uz, as is the very conservative factory tune.

OP: you really need to search more, there is quite a lot of UZ performance discussion on CL, and of course, Lextreme and V-eight.

Boyscout

iTrader: (3)

stock 1UZ V8 running individual throttle bodies sounds amazing (youtube has vids)
http://a1turbos.co.nz/mm5/merchant.m...egory_Code=1QT

Hot Rod supercharged 1UZ
http://www.bulletcars.com/supercharg...er-system.html