boost question
 

hello everyone,
Just installed a new boost gauge in my 88 supra and was just wondering what the vaccume pressure should be. the reason i ask is because in 1 spot it runs about -2 psi and then another it runs about -20 psi. huh

where are these two spots. i think the best place to run it off would be where the stock boost sensor is.

i dont know if it helps you but mine runs at about -20

well im still new to the whole "turbo" thing, but the first time i hooked it up, was on the line near the stock boost sensor, (-2) then i ran it off the line to my aftermarket BOV (-20), my stock gauge was in mmhg and my new one is in psi. also, my mmhg gauge reads -2 so it doesnt make sense to me that my new one reads -2psi when hooked up at the same place. catch what im sayin?