The nice thing about supras was that they picked up power soo quick. The MkIII where blah. The MkIV were different. They has fuel maps already in the stock ECUs that covered serious boost levels. The 2Jz actually shared most of it's archetecture with toyota's indy car motor.
I personally saw a 2jz put down 430 rwhp with intake, exhast, lockwire on the wastegate, and a boost controller. NO TUNNING. Later that same car had the RPS single turbo kit and was rocking 850 rwhp.
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