martx-5
Yoda
Offline
Well, ever since I got this car together, it's been running a little on the hot side. Initially in the 190-195 deg F range. If it stayed there, I wouldn't mind so much, but now that the weather has heated up some more, it's starting to run more like 200-205 F.
Here's what I've got, and what I've observed. Engine has 87mm pistons, head shaved for compression increase, and a mild cam grind, so the engine isn't stock.
No engine driven fan, as I have rack & pinion steering. Electric fan is only a 10" fan, as that is what came with the rack kit. Radiator is new without the crank hole. The cardboard grille deflector for the radiator is in place.
Temps will remain in the 200-205 deg range with the car on the highway at 60-70 mph whether the electric fan is on or not. Air fuel ratios are running 13-14 while cruising at those speeds. I put on a 7 lb cap, but just as a measure to increase the boiling point of the coolant. I had a 4 lb cap on previously. Timing was initially set statically at 4 deg BTDC and hasn't been touched since.
I took the thermostat (original sleeved type) out today to check it's action in a pot of water. The thermo is marked 80 deg C (176 deg F) It starts to open at just about that temp, and is fully open by 185 deg F.
What am I missing here?? And what might I look for to try and bring these temps down a bit??
Edit: I rebuilt the temp gauge myself during the restoration, but temps throughout it's range was verified in a pot of water and an accurate thermometer, so I feel the the temps the gauge is giving are correct.
Here's what I've got, and what I've observed. Engine has 87mm pistons, head shaved for compression increase, and a mild cam grind, so the engine isn't stock.
No engine driven fan, as I have rack & pinion steering. Electric fan is only a 10" fan, as that is what came with the rack kit. Radiator is new without the crank hole. The cardboard grille deflector for the radiator is in place.
Temps will remain in the 200-205 deg range with the car on the highway at 60-70 mph whether the electric fan is on or not. Air fuel ratios are running 13-14 while cruising at those speeds. I put on a 7 lb cap, but just as a measure to increase the boiling point of the coolant. I had a 4 lb cap on previously. Timing was initially set statically at 4 deg BTDC and hasn't been touched since.
I took the thermostat (original sleeved type) out today to check it's action in a pot of water. The thermo is marked 80 deg C (176 deg F) It starts to open at just about that temp, and is fully open by 185 deg F.
What am I missing here?? And what might I look for to try and bring these temps down a bit??
Edit: I rebuilt the temp gauge myself during the restoration, but temps throughout it's range was verified in a pot of water and an accurate thermometer, so I feel the the temps the gauge is giving are correct.