1uz vs 3uz

[gt40pinhd]

i'm new to this forum. i am building a gt40 replica and want to use a lexus dohc engine. seems like everyone is talking about the 1uz engine. what's the real difference in the two? is one better than the other? i plan on leaving mine N/A with 8 throttle body injectors, p&p heads, cams, not too wild though. thanks for your help.
wes

 

[Peewee]

What is your budget?

 

[gt40pinhd]

not unlimited. but i am building only one engine and want to maximize my effort. haven't found any used 4.3l engines. are they hard to find? expensive? i will put out the bucks for the eight throttle body injectors. gt40 have to have that. thanks for the help.
wes

 

[Lextreme II]

3uzfe is about 10 times as expensive as 1uzfe. If your budget is limited, then i possible stroke or mix and match would be the key. Mix and match means 4.3 block with 1uzfe heads. Buying the block by itself is cheap, but a compete engine is very expensive.

 

[UZZ30-Québec]

wouldn't you want to use 4.3 heads/pistons with a 4.7 crank/rods ?

 

[Lextreme II]

Weight might be an issue if you want the 4.7. I think the initial poster was asking about the 4.3 aluminum block. the 4.7 crank only increase very slight in cubic.

 

[Peewee]

Going 8 ITB's you will need to go aftermarket standalone ecu.

Better add another 2k+ to your budget.

If you want to retain auto you will need to add another 1k for an auto controller.

This motor and quality performance is not cheap.

 

[gt40pinhd]

i am using a porsche g50 transaxle. i do want the alum block. is there any difference in the heads of the 1uz and the 3uz? yeah, i know i have to buy a stand alone electronics. got no choice. need the 8 throttle bodies.