Thotos
Thanks for the tip. I did not know about the WaterWetter. I have found that it is being marketed in Poland. I will buy and try it . Have you used it ? Anybody has any experience with it ?
I have a feeling there is something wrong ( maybe my driving ...
)
The car has always been running quite hot.
1/ The radiator was new standard 131 installed three seasons ago when the engine was put together. It is fine and should not need replacing.
2/I have checked the water sensors ( I have two : one in the head and the other in the T-piece) they do give accurate temp reading.
3/ Thermostat temperature is currently rated 79 C(the 85 C was replaced) . This has not really improved the situation much, but just a noticeable bit. I am planning to go for 71 C later this month.
4/ made sure the coolant solution is strong enough and there are no air bobbles trapped in the block.
3/ I properly tuned and timed the engine (the timing was retarded and this made the problem even worse)
Finally I changed the fan switch from 87/92C to 77/82 C. This has really improved the situation a lot without really increasing the time the fan is on ( BTW: I have two fiat fans working sided by side. (I am actually thinking of going still lower 78/65 C.)
Note that the engine was build on extremely low tolerance of 0.03 mm with standard pistons , cranks and etc. It took me a year of driving to brake it in. Now it is normally being rev'ed up to 7600 in each gear (Typically I do not shift up until the engine has reached at least 6 K and the reaching 7600 RMP on each gear is a normal practice. On the way to the races I typically drive at 80/90 mph for hours.
So yes the car is being driven very hard.
All of this is far from standard.
I believe that 78/65 degree fan switch would be ideal. I also believe that the very good affect of switching to 77/82 C was not related so much to better engine cooling but lowering the engine temperature overall and thus preventing all elements under the bonnet accumulating too much heat.
Anyway. I am very interested in the low temperature switches and your assistance would be appreciated. ( I said switches because I want to do a bit of experimenting before committing to any tempo rating and I have 124 spider which has exactly the same temp problem I need to fix)
I also want to get a new radiator and the one you describe would be ideal.
Anybody knows where to get a new one like this ? Miro