i just took my motor apart and everything was garbage ...... so im rebuilding it with new housings and seals, bearings and im going bridgeport. my question is , if the car isnt street legal then how do i break the motor in for tuning? i did search for about a hour and couldnt fine a answer to my question , so sorry in advance if i may be bringing up something that has already been covered.


thanks in advance!

 

On a dyno

 

Yes what CHM said, is best, can be an engine dyno or chassis dyno, here is a copy of Mazda's recommendation for a starting point...

 

thanks guys