What are some varities of tomatoes that are high in acid. I hate adding extras to my tomatoes when canning. There has to be some out there that with a Ph below 4.6
What extras? Plain tomatoes only need a little lemon juice or citric acid added. Is that what you mean?
There is a big chart in the post linked below (just scroll down to it) with the acidity level given for most common varieties. Hope it helps.
Here is a link that might be useful: Tomato acidity