74 Duster
360/A-500/3.23 gear
Stock Ignition
670 Holley Vac secondary carb
Cheap headers and dual 2.5" exhaust
Factory AC with 26" rad (recored to 3 core), factory shroud, 5 blade clutch fan from a mid 80s Dodge truck (1" off the rad)
External trans cooler
Timing set by vacuum gauge cause the balancer mark is way off. Vacuum advance currently disconnected.
Last Friday at the strip, it was started, stopped and idled between my 10 passes with no AC on for a few hours and the temp never topped 160*F. In traffic with the AC on, it does not go past 180*F. On the highway with the AC running 70ish MPH at 2000 rpm the temp goes just past 200*F and drops back to 180 once you are back in traffic.
Is this caused by my timing being out of whack or could my dual snorkel scoop be creating a positive pressure under the hood that limits airflow across the rad?
How does timing affect operating temperature? I searched and could not find the answer to that.
Cley
