Misc xUZ engine data (Toyota V8)

**Brad Bedell** · 02-27-2006, 11:42 PM

As I get all the info gathered up, I'll update this post:

1uz engine specs:
Aluminum 6 bolt main block
Aluminum 32v heads
VVT-I Available 98+ in US markets
Drive by wire 98+ models
Bore: 87.5
Stroke: 82.5
Rod length: 5.7455
Displacement: 3968.72
Compression: 10.5

2uz Engine Specs:
Iron 2 bolt main block
Aluminum 32v heads
VVt-I only available in US with the Lexus line

Bore: 94
Stroke: 84
Displacement: 4663.54
Compression ratio: 9.6

3uz Specs:
Aluminum 6 bolt main block
Aluminum 32v heads
VVt-I only

Bore: 91
Stroke: 82.5
Rod length: 5.7445
Displacement: 4292.57
Compression ratio: 10.5

A few little things to note:
The 98+ 1Uz intake manifold (upper & lower) will fit onto the 2uz engine. Everything matches up perfectly.

The 2uz heads are the same casting as the 98+ 1uz VVT-I heads, however they are machined differently. (Caveat: I've not verified the 91-97 non vvt-i heads)

Cometic makes an available 98mm bore gasket for the 2uz.

2uz gaskets, water pump, timing belt, idlers all interchange with the 1uz. Although they are made of different materials, they all share the same parts.

2uz crank will fit in a 1uz engine. (I've verified this)

Rods are the weak point on these motors. I've seen quite a few broken in core motors. The blocks are nearly bullet proof.

Chevy 5.700 rods will work if you are willing to do some machine work:
Chevy rod specs:
length: 5.700
Big end: 2.000
Pin: .940

1uz rod
Length: 5.7455
Big end: 2.0465
Pin: .880

In order to make them work:
Machine .0465 off the crank. I personally would offset grind to pick up the extra stroke, but it's your call.
Machine .060 off the width of the big ends of the rods. (.030 each side)
Once done, you can use chevy bearings.
WHen ordering pistons, make sure you lower the pin in the piston .022 This will allow you to really increase the ringland thickness for you crazy people who like lots of boost.

An alternate option is to use offset bushings for the piston pins.

Some misc pictures, I'll include cad drawings of things I have when I get them finished out:

**Weasy2k** · 02-27-2006, 11:45 PM

your a god!
What is that little tube thing on the head?

(cams coming for these too :P)

**Brad Bedell** · 02-27-2006, 11:51 PM

For oiling between cams. I've not looked any closer. I'll be needing cams, wanna sponsor a monster Lexus?

**canadam** · 02-27-2006, 11:54 PM

I'm so pleased to see someone working with Toyota V8's. My mom has a GS400 and the power delivery from these engines is unbelievable in stock form, I can't fathom a modified one.

**SpeedballTrix** · 02-27-2006, 11:55 PM

UZW20 FTW!

**Murphy** · 02-28-2006, 09:15 AM

Kelford - http://www.kelford.co.nz/ - have 1UZ cams available. Not regrinds. Pricey though.

**Brad Bedell** · 02-28-2006, 09:47 AM

Originally Posted by Murphy

Kelford - http://www.kelford.co.nz/ - have 1UZ cams available. Not regrinds. Pricey though.

I need to check to see if they are VVT-I cams or not. I plan on making full use of the VVT-I. Otherwise, I'll do a weld/regrind.

**Weasy2k** · 02-28-2006, 11:03 PM

They are not VVT-i cams are 1100something usd and 300usd something to ship...

**canadam** · 03-01-2006, 01:55 AM

Could this mean that a TRD 2UZ supercharger would bolt to a 1UZ ?

Originally Posted by Brad Bedell

A few little things to note:
The 98+ 1Uz intake manifold (upper & lower) will fit onto the 2uz engine. Everything matches up perfectly.

**Weasy2k** · 03-01-2006, 02:00 AM

indeed?!
after swaping the heads

**Brad Bedell** · 03-01-2006, 02:07 AM

Why swap the heads? They are the same casting...

**canadam** · 03-01-2006, 02:17 AM

Yeah... that's what I was thinking.

Brad threw that little tidbit about the manifolds in there for a reason... I think he's being sneaky about it, but I'm quicker than most think

Originally Posted by Brad Bedell

Why swap the heads? They are the same casting...

**Brad Bedell** · 03-02-2006, 09:03 AM

Originally Posted by canadam

Yeah... that's what I was thinking.

Brad threw that little tidbit about the manifolds in there for a reason... I think he's being sneaky about it, but I'm quicker than most think

I have sometimes been known to speak in riddles

Now, if I could only find a SC for less than 3300... A turbo kit would be much cheaper for me to build.

**PearlJammzz** · 03-02-2006, 10:59 PM

SOOOOO this mean I get your V6? lol

**SpeedballTrix** · 03-03-2006, 12:50 AM

Mmm... blown 1UZ... please put that in an SW20 =D

**AndrewMcG** · 03-03-2006, 09:33 AM

Originally Posted by PearlJammzz

SOOOOO this mean I get your V6? lol

He hasn't had his v6 for a long time

**Weasy2k** · 03-06-2006, 09:54 AM

I always thgouht you had to swap the heads

my bad

Brad look around on ebay for used M112 s/cs and make your own kit for under 1000

Thanks for the thread too...im moving it to the V6 section as i dont want to see this get lost in this area...

**lowboost** · 03-13-2006, 04:02 PM

www.lextreme.com for all the info you would ever need for the xUZ motors.

**Brad Bedell** · 03-13-2006, 07:30 PM

actually,for the VVT-I engines, http://www.techinfo.toyota.com/ is a better source.

Wiring research is done on my swap. Just gotta get everything into the spreadsheet and start mapping things.

**Weasy2k** · 03-13-2006, 08:41 PM

Going to be amazing Brad,
Keep us up to date on your project

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