So... normally you break in an engine by driving around a lot and not beating the crap out of it. If you put a motor into a vehicle that isn't street legal, how do you break it in? It's not exactly easy to get 1000 miles of track time.

 

my bud that tracks a lot of a big street port usually breaks it in in a few hours.. fire it up make sure it going good. taker easy for 50-100km and then start increasing load and so on. he said it usually takes him an hour or so.

 

http://www.mazdamotorsports.com/weba...1&subject=misc

 

Awesome link, thanks.

 

The factory racing break-in procedure on the link above has worked well for me, for many years now.

It makes a huge difference whether you have used or new rotor bearings.

 

What difference exactly? Quicker break in?

 

used bearings...they are already broke in.

 

very true
if you are useing new houseings and new bearings take some mroe time to break everything in 500km or so at least..