i forgot how much boost you said you were going for, but if your just going for 7-12 psi, 9.0:1 compression is fine. 8.5 is fine too. I wouldnt do anything below that unless your planning on running 22-25 psi. Remember, the higher boost you run, the better the intercooler decreses intake temp. A air to water can take that temp down by 3 times in ideal conditions. I realy dont think you need to go with a t3/t4 hybrid. You can easily get 400hp out of one but that isnt what your going for. I say go with a smaller mitsu turbo. Cheaper, and perfect for ur app

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1993 400e
Charlotte