Single turbo 1uz

[stevechumo]

Make sure your 1UZ is from 91-94. These early engines have beefy rods more than the post 94 model. Then you can be safe with 12 psi or more. The weaker rods will give out much sooner and you don't want to take a chance. 0.6 bar of boost should be ok with all models. Even an old school Honda Civic can take 0.8 bar easily with good tuning.

 

[debeerd]

Make sure your 1UZ is from 91-94. These early engines have beefy rods more than the post 94 model. Then you can be safe with 12 psi or more. The weaker rods will give out much sooner and you don't want to take a chance. 0.6 bar of boost should be ok with all models. Even an old school Honda Civic can take 0.8 bar easily with good tuning.

How can I check that ?
It was an import engine so I don't know what model it came out of.

 

[spf_lexus]

If you have just the engine I would check the serial code on the side of the block and have the dealer look it up. 1995+ has OBDII so the diagnostic plugs will look different, also since it's an import coming to south africa it's a very good chance it's JDM and come out of the Toyota Celsior. I would contact the supplier for more info. What do the headers look like? Pretty sure 95 and + has more effecient bends, post a pic and I think i could tell.

 

[XR8tt]

The harmonic ballancer is different also...

 

[AL510]

Hi guys, if you check your fuel rails pre 94 are machined billet looking rails and post 94 with the skinny rods are a cast fuel rail.

cheers, Al.

 

[Hemi_jay]

This is very interesting, im starting to think a turbo setup might be a better option...

 

[debeerd]

I will get some pics of the headers and the fuel rail.
Thanks.

 

[spf_lexus]

The Toyota Crown with 1uz has "log" type headers, perfect for clearance and fitment. Just flip-flop their orienation and start tacking.

 

[debeerd]

Hi guys, if you check your fuel rails pre 94 are machined billet looking rails and post 94 with the skinny rods are a cast fuel rail.

cheers, Al.

This one has square fuel rails.
Will post pics later today.

 

[debeerd]

Fuel rail:

Headers:

Pic of the engine:

 

[AL510]

definately pre 94 with the stronger rods.

cheers, Al.

 

[debeerd]

Excellent !!!
Thanks.
Now to get the conversion started sometime.

 

[bdangerous]

just on a curious note, how does the stock ECU and airflow meter handle up to 8psi?do you have to run a SAFCII or similar??.I have a 94 hilux and have contemplating a single turbo,low/mid mount turbo for a while, no room in engine bay and i've got custom extractors already, what have others found??

 

[stevechumo]

How can I check that ?
It was an import engine so I don't know what model it came out of.

I'm sorry I haven't checked this thread. You can open the sparkplug wires. Usually, the stock wires aren't replaced if the engine has low mileage and the wires will specify the year it's put in.

8 psi should be ok with stock ECU with the addition of increasing fuel pressure. The simple components that I used to increase the fuel pressure were a 255 lph hp fuel pump and a rising rate 12:1 FMU. The SAFC with slightly bigger injectors are the better choice than my previous setup at low boost. But it's more expensive of course.

 

[XR8tt]

Yea or check around for EMS Stinger or EMS 8860 ECU and 35 / 55 Lb injectors.. The company is in Sydney and the guys will help you out and give you the time ...http://www.enginemanagementsystem.com/prod01.htm
An FMU is a poverty way around fuel supply .. It tends to dump fuel when boost comes on. 8 Lb[boost] X 12 [rising rate %] = 96 + 40 Lb rail pressure is VERY high fuel pressure.. Most injectors go static around 80Lb..
Then the fuel pump has to push against this pressure AND supply enough fuel!!
The ignition needs some retard around peak torque also..