I have an 88 Supra that is having a japanese engine put in it, my question is will the Apexi I'am having installed allow for the gas cut off to be altered so I can get more boost. Ihave a turbo boost controller installed, but what good is it if at 11 pounds of boost I get a whiplash, your help will be appreciated.

the controller alters fuel flow between preset increments. so far as the whiplash goes, thats up to you.