I have a blitz access sr20det ecu for s13 blacktop sr20det motor set.
I used this exact ecu on my white s13, and the car made 240whp at 9.5 psi with fmic, exhaust, and hks wastegate actuator on a stock t25 turbo.
This ecu helps with idle, gas mileage, and you feel a much smoother powerband as you accelerate.
I would like 450 for the ecu, or a stock E5 blacktop ecu plus 200-250 is fine.
This ecu works with stock maf, and stock injectors …You will notice a lot more fuel economy also !
pm or call
varun