The Stovebolt Site Forums The Shop Area Engine Shop Engine will not start some times!

I have just put together a street rod with a SB 350 and electric fans ( 2 - 12"). I took it out for a 5 mile drive and stopped at one place. When I got it home and then went to move it and it would not turn over. I checked the volts and it was 10.6, charged the battery and it started. Next day I check the battery and it was 12.5, drove it to a friends and back (about 4 miles), no problems and the battery was up to 12.77. I took it to a rad Shop and back (4 miles) and no problems. I then took it to two places (6 miles) and back home. I then stopped and tried to start it a again. Would not start. Went to check the voltage but I was called to the phone. 20 minutes or so later I checked the voltage and it as 12.54 and the car started. When ever I check the volts on the dash while driving it is always over 12. The battery is under the floor and the exhaust runs next to it. The engine is running about 190 - 200. Could it be the heat? As the fans are only on when it it hot, could the fans be drawing too much current and causing the started not to turn over. I do not hear anything from the starter when it does not start and the fans are connected to the ignition switch to be on when the car is running.

Any ideas would be welcome!