No one can tell you that with any certainty, and certainly without an understanding of the lighting conditions. A good source for some approximate times to get you started can be found here: http://www.digitaltruth.com/devchart.html
Read the very first paragraph and take that as an absolute truth. That is the only absolute wrt B&W film developing. Shel > [Original Message] > From: Michael Spivak > I have a problem that i can't solve myself here... so i was adviced to > ask the list :) (thanks Boris) > I have an exposed TriX 400 film pushed 1 stop (exposed as 800) and i > usually use the TMAX developer for the process... but i've ever pushed > a film... can someone help please and tell me the developing time for > this film poushed 1 stop with that specific developer ?

