Re: Reliable fuel pressure gauge
I bought a Hypertech one years ago and checked its accuracy and it was spot on.
Every bourdon tube type pressure gauge is different though and has an internal mechanical linkage and should in theory be confirmed to be reading correctly by using a known standard. That said gauges from known reputable manufacturers such as Autometer are usually calibrated correctly when new. Just make sure that if its a mechanical gauge, its reading zero before you start. If not, then theres a good chance somethings amiss.