Running Hot
I have a 66 Valiant (amarican dart), 400 with stock heads,M1 single plane intake, 2 1/4" with 4" collectors fender well headers, 4" flowmasters, .528-284 mech cam, MSD 7al2 ignition. Had a wilder 383 before but too much for the street. My problem is that once it gets hot it won't cool down. I have tried running an electric water pump with electric fans, belt driven water pump and a 7 blade stock fan. No shroud on the rad as the fan is only 1" from the rad. Tried usig a thermostat and also a restricter disc. Went from the stock 3 row rad to a 26" 3 row rad out of a charger. Tried more timing and less timing, changed carbs, changed temp gauges. Found a frost plug in the block and removed. The egine uses a motor plate to mount the front, has a hood scoop on it as well. Could the two things together cause the air flow through the rad to stop or slow down while the car is in motion? I gave up on it last year and drove it around with the temp gauge reading 230, put a 20 pound rad cap so it won't boil over. I have run out of ideas except replacing the engine. Does anybody have an idea? I GIVE UP
I have a 66 Valiant (amarican dart), 400 with stock heads,M1 single plane intake, 2 1/4" with 4" collectors fender well headers, 4" flowmasters, .528-284 mech cam, MSD 7al2 ignition. Had a wilder 383 before but too much for the street. My problem is that once it gets hot it won't cool down. I have tried running an electric water pump with electric fans, belt driven water pump and a 7 blade stock fan. No shroud on the rad as the fan is only 1" from the rad. Tried usig a thermostat and also a restricter disc. Went from the stock 3 row rad to a 26" 3 row rad out of a charger. Tried more timing and less timing, changed carbs, changed temp gauges. Found a frost plug in the block and removed. The egine uses a motor plate to mount the front, has a hood scoop on it as well. Could the two things together cause the air flow through the rad to stop or slow down while the car is in motion? I gave up on it last year and drove it around with the temp gauge reading 230, put a 20 pound rad cap so it won't boil over. I have run out of ideas except replacing the engine. Does anybody have an idea? I GIVE UP