AN EMB135 FO RPTED THAT THE CAPT AND PF MADE A HDG AND ALT DEV WHILE FLYING THE TEB SID.

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DEPARTING TEB; WE WERE ISSUED A SID TO FLY RWY HDG TO 1500 FT THEN R TURN HDG 280 DEGS; UNTIL 4.5 DME; THEN CLIMB TO 2000 FT. WE BRIEFED THE DEP AND IT WAS MY UNDERSTANDING THAT THE FLYING PLT WHO IS TYPE-RATED IN THE ACFT AND HAS OVER 100 HRS IN TYPE; KNEW THE SID. AFTER TKOF; THE FLYING PLT INITIATED HIS R TURN AT APPROX 500 FT AGL. I THEN STATED; 'RWY HDG; 1500 FT; RWY HDG; 1500 FT.' A TURN TO THE L WAS MADE TO COMPENSATE FOR THE EARLY TURN. HE ASKED ME TO READ HIM THE SID. AT THIS TIME; I NOTICED WE WERE RAPIDLY APPROACHING 1500 FT AND I STATED; 'LEVEL OFF; 1500 FT.' THE PLT FLYING AGAIN ASKED ME TO READ THE SID AS WE BLEW THROUGH 1500 FT. I SAID; 'LEVEL OFF; 1500 FT; TURN R 280 DEGS.' I THEN BUGGED HIS HEADING FOR 280 DEGS. WE WERE AT APPROX 1850 FT IN THE TURN FOR 280 DEGS WHEN THE CTLR MADE HIS CALL INQUIRING ABOUT OUR ALT AND HDG. I FELT I DID ALL I COULD TO AVOID THIS SIT. I INSISTED ON A THOROUGH BRIEF. I USED CRM TRAINING AND STATED HIS NAME AND WHAT WE WERE TO BE DOING. I WAS IGNORED AND THAT IS WHAT GOT US INTO THIS POSITION. TO PREVENT THIS SIT IN THE FUTURE; I WOULD SUGGEST THE FLYING TYPE-RATED PLT BE AWARE HOW IMPERATIVE IT IS TO FULLY UNDERSTAND THE FIRST 3 TO 4 STEPS IN THE SID. ALSO; HE NEEDS TO BE AWARE HE IS IN A CREW SIT AND THAT JUST BECAUSE HE IS THE BOSS; HIS WORD AND OPINION ARE NOT ALWAYS CORRECT.