What was found
AFTER TAKEOFF, EXPERIENCED A VERY STRONG PUNGENT ODOR IN THE COCKPIT. AFTER LEVELING AT 9000 FT, REDUCED POWER & ODOR INCREASED. DID NOT SWITCH PRESSURE SOURCE DUE TO RETURN TO BASE. AFTER LANDING, ODOR WAS PRESENT THROUGHOUT CABIN. NO SMOKE WAS DETECTED IN EITHER THE COCKPIT OR CABIN. R & R WATER COALESCE SOCK IAW AMM 21-51-00. PERFORMED APU & ENG RUNS WITH NO DEFECTS NOTED.