Toyota/Lexus V8's

[chassis 33]

Are they any good for getting power (and decent torque curves) out of? Fleabay always seems to have a trickle of 4l twin turbos for sale lifted out of Soarers and that sort of thing.

Has anyone had and experience of them?
Regards
Iain

[splatspeed]

someone put a lexus TT in an ultima in sweeden i think

good power

i can sim the engine for you if you are in the area need the practise

sean

[chassis 33]

Sim the engine?

[splatspeed]

i have simulation software

and i can simulate what you want to do to the engine

makers claim 5% accuracy

you design the engine on the pc then buy bits much cheaper

Sean

[chassis 33]

Ah, ok, what sort of info of you need for that?
Regards
Iain

[splatspeed]

i was hopping you would be nearer

i am on the south coast

i am in saturday

might be able to look at things

over phone i will see if the lexus engine is in the data sheet

its all about chooing parts that work together and simulating

so i need input from you what you are looking for

Sean

[stevieturbo]

chassis 33 said:

Are they any good for getting power (and decent torque curves) out of? Fleabay always seems to have a trickle of 4l twin turbos for sale lifted out of Soarers and that sort of thing.

Has anyone had and experience of them?
Regards
Iain

it does??

Normally, the Soarer came with a 2.5 straight 6 twin turbo, or a plain old normally aspirated V8.

The V8's are an excellent engine though, and can make plenty of power.

[chassis 33]

Ah, showing my ignorance there! I don't know much about them TBH, hence the questions, but they look very solid units that should form a good basis for a high numbers engine. Is that assumption right?

Regards
Iain

[busa_rush]

chassis 33 said:

Ah, showing my ignorance there! I don't know much about them TBH, hence the questions, but they look very solid units that should form a good basis for a high numbers engine. Is that assumption right?

Regards
Iain

www.1uzfe.com/

[stevieturbo]

I think its safe to say, it wouldnt be that difficult, to build one with enough power, that its pretty damn dangerous on the road.

Slap on say a T76 along with supporting mods, and I dont see why 7-800+ shouldnt come fairly easily.

[Tony427]

Go to www.lextreme.com its the best resource on the web for anything on the 1UZFE.

I'm a real fan of these engines, they are tunable and are particularly receptive to forced induction, the engine internals are extremely robust and the design and build quality first class.

The Swedes mentioned in the earlier post got over 1000bhp from their dry sumped, low compression, intercooled 4 ltr Lexus V8 but most Aussies and now Yanks are quite happy putting between 6 and 9 psi boost into a standard un-opened engine using just an intercooler and fuelling mods. That should be enough to get you near 400bhp together with reliability.

Cheers,

Tony

[chuntington101]

i have heard people running upto 15psi on bone stock engine (with fuel mods and intercooler).

the pistons are foeged as are the rods i think. and the crank is very stout.

Chris.

[splatspeed]

so how much power did you wany?????

[MTv Dave]

I hear they're very good engines, with very good, well balanced stock internals with an all alloy block and head. Very robust and can take a lot of force feeding without doing anything inside.

I think the LS400 '89 on had a good V8 that you can get pretty cheap on fleabay with 240bhp out of the box.

[lukeb]

I too have the horn for the 1UZFE, would love to do something with one. The only snag I can see from limited research is that you can't do much to tune them nat. asp.

For a well designed 4 valve engine, 100bhp per litre should not be too hard to achieve? Throttle bodies, good has flow in & out is relatively easy to engineer, the problem I think would be the camshafts. Unlikely to have enough meat to reprofile, the gear drive in the centre will make it tricky or very expensive to have customs made. I don't think there's anyone producing aftermarket cams unless you know better?

[Transmitter Man]

Lexus powered:

www.f40.co.nz/f40/index.htm

Phil
02 E39 Tourer Tiptronic
79 De Tomaso Longchamp GTS

[cptsideways]

Th UZ is a fantastic engine, very light all alloy block, 4 valves per cylinder etc etc. The "easy" way to get big NA figures is with throttle bodies & standalone ECU. A fairly popular modification with the Auzzies who are simply mad when it come to most things Toyota.

Alternative is the turbo route & 600bhp on standard engines is not unheard of. Again the Auzzies will provide various bellhousings to mate one up to a suitable gearbox.

www.toymods.org is a good forum

[chuntington101]

lukeb said:

I too have the horn for the 1UZFE, would love to do something with one. The only snag I can see from limited research is that you can't do much to tune them nat. asp.

For a well designed 4 valve engine, 100bhp per litre should not be too hard to achieve? Throttle bodies, good has flow in & out is relatively easy to engineer, the problem I think would be the camshafts. Unlikely to have enough meat to reprofile, the gear drive in the centre will make it tricky or very expensive to have customs made. I don't think there's anyone producing aftermarket cams unless you know better?

you could go for one of the later engines, they are bigger (upto over 5ltr i think).

Chris.

[chassis 33]

From what I've read in the past few days the 1UZ engine is a stronger unit than the 3UZ, the conrods while being identical bores both ends and lengths, they have more metal along their length, likewise the pistons have extra oilways. You can stroke both engines but cranks seem expensive; 5kUSD or more, maybe I just havent found the right supplier yet.

It has been suggested that a pair of 2l MR2 turbos will force induct the 1UZ quite nicely to about 550hp (which is where I want to be, with good delivery throughout the rev range as the MR2 turbos are (apparently) designed to give maximum boost at fairly low revs. Any thoughts?
Regards
Iain

ETA

lukeb said:

For a well designed 4 valve engine, 100bhp per litre should not be too hard to achieve? Throttle bodies, good has flow in & out is relatively easy to engineer, the problem I think would be the camshafts. Unlikely to have enough meat to reprofile, the gear drive in the centre will make it tricky or very expensive to have customs made. I don't think there's anyone producing aftermarket cams unless you know better?

Just found this company www.camshaftshop.com/camshafts/view/46/lexus-camshaft/ that do alsorts of variations. Not pocket money though.
Regards
Iain

Edited by chassis 33 on Wednesday 14th February 09:14

[stevieturbo]

MR2/GT4 turbochargers are flimsy bits of crap. I wouldnt re-use them again on anything.

It would be much easier, and better to build a single turbo setup with a decent ball bearing unit.