ive seen miatas with 13b 13bt engines and a common swap is sr20det engine in it, but since thats a nissan engine you gotta do some serious wiring shit.
ive i had the knowledge and the money id like to do a 13bt swap in a miata.
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Driving definitions: Understeer is when you hit the wall with the front of the car and Oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and Torque is how far you take the wall with you.