m7gte..... info plz

[supra90turbo]

Its a 7MGTE.

You just bought it, so do maintenance first. mods later.

First and foremost: do a block test (you can buy a kit at NAPA or any parts store) also, buy a compression tester off of summit, (they're cheaper there than anywhere, and still good) do a compression test while the engine is warm.
Once it all checks out, replace plugs, wires. Check the air filter and replace with either new factory air filter, or buy a GOOD cone filter, not some ebay crap.
replace fuel filter, inspect all hoses. Replace every coolant hose if you can. Chances are that they're brittle and cracked or they're swollen and squishy.

clean clean clean. a clean car is a happy car, and people don't understand that the engine is also an area that needs attention.
Check for oil leaks, and fix as soon as you can. An oil leak left unnoticed is a "THE 7MGTE IS A PIECE OF SHIT" thread waiting to happen.
400hp on the stock CT is not very common. At higher PSI they are just blowing hot air. Upgrade is necessary if you want to be in the upper 300's, 400's with a CT26.
300 is doable and even 350ish is with the stock CT.

Take care of the car. This cannot be stressed enough.
I stand behind the statement: 99% of MK3's problems is the owner.