High coolant temps (1 Viewer)

[half k cruiser]

Exactly, the sensor is almost certainly based on a resistance reading which would make its reading variable, but what its reporting to the ECU and what the ECU then reports out are the real question.

As I understand it that's what your doing when you program the gauge with the custom parameters. Essentially your asking it to ask the ECU a question that its not currently supplying out data for. For scanguage you type in 4 different lines of code, hit send, and the ECU responds with an answer in the form of a gauge. The fact that you can use them to reset trouble codes means they have at least a small degree of manipulation available over the ECU. I am guessing the torque pro is similar ?

 

[Onefastrx7turbo]

Finally was able to test the coolant temperatures on a hot day here in Phoenix. the ambient temperature was roughly 108F, the same as it was before. Unfortunately, I wasn't able to test idling temperature for more than 10 minutes, but I did test highway and city street temps. Before I got into the cooling system, I was seeing 200-203F at 70mph on the highway and 197-199F on the streets. I now have a hard time getting the temperatures past 197F. Highway driving reached 200F one time then dropped back down to 196F. I have noticed that after the fan clutch change, the fan roar has gone down. Let me explain my theory... I am thinking that the old fan clutch was allowing the coolant temperature to reach higher temperatures while sitting. Once I began moving, the superheated airflow across the fan clutch caused it to lock harder, hence the fan roar when in stop and go traffic. Now, I do hear a slight whooossssh that goes away relatively quickly once I am up to speed. Again, my theory is that the temperatures are staying lower and it is doing a better job of modulating the temperatures, not allowing them to reach the higher end and thus, not requiring as much "lock up".

Too early to see if it will help mpg or not but I'm happy with the lower coolant temperatures and somewhat better A/C performance while parked.

 

[NMBruce]

yesterday I pulled a 5 mile hill, starting around 6500 ft and had an 1000ft elevations change at 65mph & around 3500 rpm the whole time, coolant temp got to 208, then dropped to 206 as I topped the hill and dropped back to about 195 within a mile or two. OAT was around 83

 

[NMBruce]

well it might not be too helpful, already getting cool here, started with a OAT of 68degs, when I started pulling the mountain grade at the chain up area, it was 65degs, at the top of the pass it was 55degs. From chain up area to top is 9 miles and a 3000ft climb, the speed ranged from 55-45-35-45mph and rpms where 2600-3000. The engine load was almost always in the 90-98% and the coolant temp was 194-199degs.
looking forward to seeing how it does going to Houston next week

just before I started the climb, beautiful day in the mountains

stopped at the chain up area

stopped the top of the mountain pass