Let's say I built up another motor with a larger turbo, but I would like to retain the stock computer and use a piggy-back controller. Now, let's say the new setup is designed to pull hard all the way to about 7.5K rpm. Does the piggy-back allow the higher RPMs or will the factory computers stop it in the 6K range? If so, how can I get around it without cutting out the stock ECM and piggy-back in favor of a standalone controller. Any inputs would be helpful.