Question about DWL with vacuum gauge
 

I want to maximize my P&G efficiency by accelerating at around 70% load but I do not have a scangauge to tell me the %load. A vacuum gauge is another (cheaper) way of telling you engine load, so my question is how to convert a simple engine load reading over to the vacuum gauge. I know that when you accelerate vacuum goes to around 0. Is 0 vacuum 100% load? Should I be trying to accelerate at around 0 vacuum to maintain my target load or is it more complicated than that?

0 is 100% and if you would like to use 70% you should use 30% away from zero at least how I understand it.

Amount of throttle is perhaps irrelevant there, just make needle to be at target and adjust throttle so that it stays as it does change with rpm increase.

Use 1.5 inches for 90%.

Thanks for the responses guys. I guess a better way to ask my question would be whether or not vacuum is directly proportional to engine load. I will just have to learn the gauge as I drive to see exactly where i need to be.