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

[chassis 33]

Sim the engine?

[chassis 33]

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

[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

[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

[chassis 33]

Say it as it is why don't you Thanks for the heads up. Am I right in thinking two smaller units will spool up quicker than one larger one, hence less turbo lag? Albeit with other mods, I'm looking to atleast double the stock output of the engine, hence a fairly sizable turbo will be needed.

I guess I need to go back and dust of my thermo lecture notes from uni to put some metrics behind all of this.

Regards
Iain