I'm  using sqlmap to get a website's DB and found out that the site is time based boolean vulnerable; but the target is showing SQL errors, what made me think that it would be a based injection error.

 I was curious, so I turned on the  `--parse-errors`  option which showed that some SQL reserved words are filtered;  something like:

    AND became A_N_D, SELECT became S_E_LE_C_T ...

 and so on... 

Is there a way to bypass this with sqlmap? Some tamper option?