Hello All, It's been a while since I contributed in any way on this site so here goes.
Many years ago I decided to upgrade my cooling system since it overheated quite nicely in stop start traffic.
So I added an electric thermally controlled fan and removed the plastic TR6 fan.
That was a waste of time as the generator was useless at supplying current at low revs, with the ammeter always in the negative at low revs if the fan was on.
So I used to turn the engine off and wait for the traffic ahead to move, then start again and move the TR.
I decided to restore the car so I had the engine reconditioned and the radiator recored.
Alas I made the mistake of leaving the crank handle hole in.
Next step was an alternator, I added a Lucas 17AR (I think it was a 17AR) with a belt adjustment thingy from Rimmers.
Kept my wide belt and decided not to go for a Dynamator after I heard that they aren't reliable.
Started the car and set the fan to come on at 190F. I then decided to test the accuracy of the water temp gauge and sender by immersing a meat thermometer in the neck of of my long neck radiator.
Yes I know it's not an accurate method or thermometer and got a gauge reading of about 190F and a meat thermometer reading of about 160F.
I understand that a TR4 engine operating temp should be about 190F.
So can I be bothered getting a more accurate thermometer to test again.
Is the mark on the temp gauge between 185 and 250F about 210F?
I suppose I should set the fan control to come on at about 210 instead of 190F if the temp on the gauge is that far out.
Jim and the still off the road 1962 TR4
Many years ago I decided to upgrade my cooling system since it overheated quite nicely in stop start traffic.
So I added an electric thermally controlled fan and removed the plastic TR6 fan.
That was a waste of time as the generator was useless at supplying current at low revs, with the ammeter always in the negative at low revs if the fan was on.
So I used to turn the engine off and wait for the traffic ahead to move, then start again and move the TR.
I decided to restore the car so I had the engine reconditioned and the radiator recored.
Alas I made the mistake of leaving the crank handle hole in.
Next step was an alternator, I added a Lucas 17AR (I think it was a 17AR) with a belt adjustment thingy from Rimmers.
Kept my wide belt and decided not to go for a Dynamator after I heard that they aren't reliable.
Started the car and set the fan to come on at 190F. I then decided to test the accuracy of the water temp gauge and sender by immersing a meat thermometer in the neck of of my long neck radiator.
Yes I know it's not an accurate method or thermometer and got a gauge reading of about 190F and a meat thermometer reading of about 160F.
I understand that a TR4 engine operating temp should be about 190F.
So can I be bothered getting a more accurate thermometer to test again.
Is the mark on the temp gauge between 185 and 250F about 210F?
I suppose I should set the fan control to come on at about 210 instead of 190F if the temp on the gauge is that far out.
Jim and the still off the road 1962 TR4