upgrading my turbo
 

That all depends on how much money you have...

im no turbo expert, but i think the t4 is the style of flange the turbo uses to connect to the manifold bolt pattern, so if you did, you will need a t4 tubular manifold to make it fit..? any one step in if this is wrong..

i have no experience with a 1jz or 2jz so i cant answer that..

My Friend has a 1989 supra turbo, he is running e-MANAGE ULTIMATE. This guy knows a lot about older supras and he is the guy that is going to give me the T4 turbo with a manifold and a wast gate, he used it on his car, but i have a some miles on my car i am thanking blowing my engine up

Is your vehicle stock? How would you rate the condition of your engine? I'd give it a 2nd thought before bolting on that turbo setup. You'll definitely need some sort of tuning. At least upgrade the fuel system and AFM before you think about hooking up that turbo. You'll also need a custom downpipe and you'll need to upgrade your exhaust if you use it.

7m 3.0 liter 232hp single turbo
1jz 2.5 liter 275hp? twin turbo
2jz 3.0 liter 320hp twin turbo

You can make tons of hp with any of em if you do it right...

Right now all i have on my car is just a bigger airflow meter an intake, an HKS exhaust, turbo timer, i just got my Greddy e-01 boost controller. I got my supra for $1000 it was a good deal. It came with the HKS exhaust,HKS turbo timer and an HKS boost controller, but i dont like the hks boost controller sucks i could not find out how to tune my boost so i just got the greddy one it is a lot better. There is a lot i am going to do to it i have just started.