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Well, in stock ECU there is a clear change in AFR and injection table, so there are 2 torque dip, one is caused by engine's component and geometry, the other is caused by ECU limitation, that's why changing parts and ROM makes the car rev much better.
And if you just check fluid dynamics parameters you can see that the stock car can't breath.
Toyobaru did a great engine and perfectly hit their commercial target! This is the funniest car ever with a 2.0 L NA engine!!
Besides it earns a lot of hp every time you look at it lol
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