i have been scouring the internet on information on upgrading the 1jzgte. Most pages that would be any help are in japanese. I have been down the quarter once and have broken into the 13's(car is stock apart from 3"exhaust and 13psi. would like to make low13's high12's. Not setting sites too high for street car. Just finding it hard to find any info on someone who has done any mods to this engine.

well... you should be able to get there fairly easyish

intake, exhaust, intercooler, intercooler hardpipes slightly larger than stock.. those are the first cheaper upgrades
then you're lookin at upgrading the turbo, i would suggest a single turbo as they're not as much of a nightmare to plumb in as opposed to a twin turbo setup

also the 1jz is very very similar to the 2jz so you could look at what the 2jz guys are doing as mods to their engines

this is the 1.5j (2jz block with 1jz head) that i work on frequently... take a look around JZA70 R 1jz Supra

nice one. was tryin to find info on the 1.5 jz and havin no luck whatsoever. the guys who put my engine in were tryin to tell me it couldn't be done. I'm from perth, findin someone who would have the knowledge and help with the job seems impossible.

LOL can't be done :lol:

don't take your work there :P

2jzgte block + 2jz head gasket and head bolts + 1jz head and turbo's etc, bolt it all together and you have a 1.5j ;)

you will need to slightly lengthen the water pipes to the water pump area as the 2jz block is taller :) but nothing major needs doin

i guess then you would need the 2jz fuel system?

nope... all 1jz... unless of course you're upgrading and modding and all those yummy higher boost things ;)
then you could put a 2jzgte fuel pump or walbro fuel pump in etc but if it's gonna be a stocker 1.5j then all original is fine for a bit

how bout the computer. can you re-program it or do you have to get a new chip?

... and was wondering if gettin a costom intercooler and hard pipes would really make much difference?

want to know about chip in computer also