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| | | | Joined: Sep 2003 Posts: 151 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 151 | OK I've had some over heating problems with a '78 350 SBC thats in my '46 Chevy Panel. It's not cammed up or anything wild. Timing is at 8 deg BTDC, 625 Road Demon running a little rich right now, headers, original radiator copper and brass, 17" 2700 CFM electric fan, fan comes on at 180. It's got AC but I have not run it with the AC on. It was holding about 195 deg for short/med around town runs. The first long run it got to 205/210 and I shut it down to cool off. I didn't need to hurt the motor. I had a 180 thermostat but dropped it to 160 after first over heat. Didn't help, really it over heated faster on a shorter run.
Now before I pull the radiator and have it checked and rodded I was told to ask what would considered the normal operating temp be for the motor. Thats what I need to know.
Thanks
David
Just a firefighter,
Cleverly disguised as a responsible adult
'46 1/2 T Panel
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | I'd say it should be able to handle 200 +/-, "normal" might be about 190/195, but the fact it overheats [not badly] on a long run would make me suspect the elec fan is inadequate - might also have to do with a lower pressure cap on the old rad than the 350 likes .... at least it should be lower pressure for a rad that was designed for no pressure  Bill | | | | | Joined: Jun 2005 Posts: 1,756 Shop Shark | | Shop Shark Joined: Jun 2005 Posts: 1,756 | I run 185 with the 185 thermostat, I have a new alum 4 core radiator, 17 lb. cAp and dual elect fans pushing thru the radiator.The fans don't kick on till 180 somthing. Had no overheating problems other than one time the wire dropped off the fans in traffic, Ran about 215-220 with no boil over. | | |
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