At 1+7 you will get some compensation with D23 but speed and shadow contrast will still be relatively poor, with an increase in graininess. Development times will be quite long - not necessarily a problem but something to be aware of. pH is not the only factor in determining the relative graininess of a developer. Is there a specific reason you only want to use two ingredients, why you do not want buffering, etc? What are your goals in terms of sharpness, speed, contrast, curve shape and graininess?
Originally Posted by el wacho