The description of the 1 qt unit on the Accusump webpage says it is " designed as a pre oiler for all applications." So, if all your using it for is a pre oiler, the 1 qt should do it.
I installed an Accusump for surge control after hearing about another local Cobra guy blowing an engine while autocrossing due to lack of
oil at the pickup. The 2 quart would have been enough, but for an extra $8, I went with the 3 qrt.
Pete