Cooling Question - ZR-1 Net Registry Forums

Dynomite · 10-28-2016

Today at 70 deg F Outside Air Temperature got same results as at 50 deg F Outside Air Temperature.

50 deg F - 70 deg F outside Air Temperature.
Ron Davis Radiator.
Haibeck Chip (fans ON 205 deg F, OFF 200 deg F).
1990 ZR-1 #72 (40,000 miles).
Stock Exhaust.
180 deg F Thermostat.
Green Antifreeze down to -10 deg F.

6th Gear
65 mph
1,500 rpm
207 deg F Engine Coolant Temperature

5th Gear
65 mph
2,200 rpm
190 deg F Engine Coolant Temperature

17 deg F cooler running 65 mph in 5th Gear rather than running 65 mph in 6th Gear.
Did the cycle several times with identical results. Coolant Temperatures moved from min to max and back in a minute or two after shifting Gears.

Idle at 850 rpm 203 deg F.

10-28-2016	#26
Dynomite Join Date: Aug 2009 Location: South Dakota/California Posts: 3,788	Re: Cooling Question Today at 70 deg F Outside Air Temperature got same results as at 50 deg F Outside Air Temperature. 50 deg F - 70 deg F outside Air Temperature. Ron Davis Radiator. Haibeck Chip (fans ON 205 deg F, OFF 200 deg F). 1990 ZR-1 #72 (40,000 miles). Stock Exhaust. 180 deg F Thermostat. Green Antifreeze down to -10 deg F. 6th Gear 65 mph 1,500 rpm 207 deg F Engine Coolant Temperature 5th Gear 65 mph 2,200 rpm 190 deg F Engine Coolant Temperature 17 deg F cooler running 65 mph in 5th Gear rather than running 65 mph in 6th Gear. Did the cycle several times with identical results. Coolant Temperatures moved from min to max and back in a minute or two after shifting Gears. Idle at 850 rpm 203 deg F. __________________ Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 10-28-2016 at 01:00 PM.