Ilford's development recommendation for D-76/ID-11 is a good starting point.(posted 8457 days ago)Specifically referring to EI, note that test reports in which the tester has used DD-X can lead to the notion that the film's EI is significantly higher than its rating. It is _not_ except in DD-X, Microphen and similar developers. Those developers are speed-enhancing developers, giving EI 640 for HP5+ for normal contrast, with the penalty of somewhat more graininess than D-76/ID-11.