1uz turbo limits?

[laaag]

Hey guys,

I've been searching these forums and lextreme trying to figure out exactly what the 1uz can do with a single turbo and at what stages:

Im looking to run anywhere between 8-14psi with a single GT35/40 or a t04/500 with a front mount intercooler.

With stock motor, ecu ect. ive heard 6-7psi and around 180rwkw before injectors and some sort of piggyback ecu are required.

Aparently 9psi is the limit of the OEM headgaskets

Then 14psi (300rwkw) with injectors, aftermarket managment, RRFPR, cometic head gaskets ect

At what stage will the bottom end need to be upgraded?

Obviously if i ditch the factory ECU i will have to go a manual valvebody for the auto trans
so im trying to figure out my power and financial goals.

If anyone has had past experience i would be good to have it all in the one thread.

Here is a link to my car that im looking to turbo

http://www.toymods.net/forums/showthread.php?t=46240


Any help is appreciated, Cheers

[JustCallMeOrlando]

JustenGT8 has made around 400rwkw on a totally untouched 1UZFE with a good tune. Many people have big numbers unopened too. I don't know who has made up these artificial limits for you.

Personally, I wouldn't even consider forced induction and a factory ECU. Go aftermarket straight from the get go.

[Hen]

I concur with JCMO. I remember an old issue of Zoom with that famed yellow RA28 drag car on the front. Stock from the wreckers 1UZ, twin turbos, aftermarket management, 9.8?? (sorry can't remember exact time, but you get the idea) second pass while still sorting out the setup.

They can handle abuse in stock form.

Hen

[ed]

I don't know who has made up these artificial limits for you.

cough/lextreme/cough

well meaning, slightly misguided, just be objective in pulling actual fact from the intahweb chatter (like 99% of the web really)

get and ecu and a turbo in the same spending spree. seriously, one is useless without the other. all aftermarket 1uz gaskets are laminated steel, so forget about brands and rubbish. if youre going to boost to 1 bar id buy some ARP studs though.

[Duk]

Obviously if i ditch the factory ECU i will have to go a manual valvebody for the auto trans
so im trying to figure out my power and financial goals.

Another option:
You could use a Trust E Manage Ultimate (EMU). That way you can retain the factory ECU for the auto trans, limit the output of the AFM if it reads to high and causes any faults and use the Trust MAP sensor to be the load referance for the injector (big injectors) and ignition correction maps (16rev/16load).
You could even ditch the factory AFM and the EMU can send a dummy AFM signal to the factory ECU and it'll still thinks it's just running a standard engine.
The EMU also has some auto trans settings, but I've not needed them and so I can't tell you anything about them 'cause I'm to lazy to look in the manual .

Then there's the fact that you'll be retaining the factory knock sensors.

[laaag]

Cheers for the feedback guys.

Looks like i'll be heading down this route as opposed to supercharging.

I spoke to Michael from MV automatics in S.A and he said the factory auto should be
good for up to 260-280rwkw anyway.

Are there any tuners in Sydney with extensive 1uz knowledge?

I was reading through Justins thread but 50 pages
looks like he is running an autronic?

These limits are what has been said to me from various workshops and research
i know that injectors ect are obvious but there is nothing concrete out there in
relation to strength of head gaskets and internals ect.

i guess these motors are cheap enough to replace is it does go pop

[JustenGT8]

It's been a loooong time since i have run under 9psi and alot of those kms have been hard kms......no HG issues for me?

[ed]

Are there any tuners in Sydney with extensive 1uz knowledge?

there is nothing concrete out there in relation to strength of head gaskets and internals ect.

unigroup engineering in girraween

and there is plenty of concrete evidence around on these engines. i mean lots and lots

head gaskets are NOT a problem. fasteners maybe, but thats a TTY problem. just get ARP stud set. rods? depends on what rpm youre going more than boost justen has the best history yet on the eraly sintered rods, generally 400hp on sub 6500rpm boosted applications seem 'reliable'

[ed]

cough/blatantselfpromotion/cough/v-eight.com/cough

[nilprospects]

Should get that "cough" looked at Ed

[PlacentaJuan]

yea i heard you should never trust a doctor that is sick or something....

btw i reckon that is pretty sad for a 1uz with single turbo to only be making 180rwkw isnt it?

i mean my stock 2jz is putting down over 240, i would be wanting a bit more if i had a nice v8 though....

[JustenGT8]

yea i heard you should never trust a doctor that is sick or something....

btw i reckon that is pretty sad for a 1uz with single turbo to only be making 180rwkw isnt it?

i mean my stock 2jz is putting down over 240, i would be wanting a bit more if i had a nice v8 though....

and if you believe that is any real sign of what turboing 4 litres of V8 can deliver you need your head read

Mine did 265rwkw on 6.5 psi...lets see a Toojay do that

[ed]

i think those figures come from the SC 1uz variety - and theyre usually a pretty piss weak result generally speaking

[matty12]

When i finally get boost into mine i will be working on the same sort of method panelbeaters use to tighten bolts,tighten till it strips then back off half a turn.

I will boost mine till it breaks(if it ever happens)then just buy a new motor.

I know it not a real technical method but its a no brainer for a simpleton like myself.

[Sciflyer]

Im going to hazard a guess that the 1UZs running forced induction but with relatively low outputs are still using the factory ECU in some way
since its far from optimal and cracks the shits at not much more than a few psi