I am not using a vacuum reference for your gas pressure regulator, as I have it established to a hard and fast stress of 60-62 PSI like the original returness gas technique for the BEAMS. This layout gets rid of the constraints and inefficiencies linked to an individual throttle body. https://toyota-4age27924.bloggazza.com/38014397/an-unbiased-view-of-4age-20v-turbo-engine-for-sale