[Shane@DBPerformance]

To do a hard break-in, you need an all-motor setup or a conservative already done tune on a turbo car. Since, most guys doing a motor build on a turbo car, don't already have a tune for their new setup, that poses a problem. The last thing you want is any knock at all on brand new rings and you also don't want to be too rich. 0 psi is as much boost as those motorcycles would see during a hard breakin, so you don't have to exactly go ape shit with the boost.

If I am doing a break-in on the dyno, I try to very very quickly get my A/Fs in check and then either do a lot of vaccum pulls or go into the motorcycle style breakin, depending on what the customer wants to do. For cars that we did the motor on, I like to change the oil many times, do a lot hard vacuum pulls for a while, do some building up toward more aggressive pulls with very limited boost and limited RPMs with a lot of cooling breaks and then have the customer put some miles on the setup(if possible, not always possible on a race car) and then do the final tune later.