Quote:
Originally Posted by cellsafemode
You dont need a tune for porting the throttle body. The throttle body opening where the blade closes isn't shaved away, so essentially you just remove any bumps or excess material leading up to and away from the blade where it comes into close contact with the TB.
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That will still change the relationship between throttle opening and airflow, and the ECU needs to know what this correlation is. I've heard this referred to as a 'transfer function'.
Norm