John, Good point about the fans. How about putting a speed sensor in the circuit. That way the fans will still be automatic and you will not have to worry about them not coming on when needed. Scott Mueller DMCNEWS 002981 DOA 5031 -----Original Message----- From: dherv10@xxxx [mailto:dherv10@xxxx] Sent: Thursday, July 05, 2001 11:42 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Heat test Group, We all know what can happen when a car overheats and the De Lorean is no exception. I have always heard that if you get over about 35 to 40 MPH the cooling fans are no longer drawing air because the out side air due to speed is forcing it's self thru the radiator and cooling the water.