After searching through all the threads of what tempurature the 80 series should run at when the cooling system is operating properly, as well as discussions of what people have observed with operating temps, I have decided we should have a consolidated thread. If you have done the Raventai mod or have a seperate temperature gauge, please post the following:
1) Year of truck and any mods to the engine,
2) What gauge you have and where the sensor is mounted (if not the raventai mod),
3) Any cooling system upgrades, replacement parts, etc (radiator, fan clutch, which ones).
4) Coolant used, mixture ratio, and any coolant additives.
5) Temperatures observed while driving around town, sitting idling (i.e. drivethrough), on the highway at highway speeds, and the air temperature when you recorded these temperatures. Was the A/C on?
6) Highest coolant temperature observed.
7) Thoughts on the highest safe operating temperature.
I'll start:
1) 1996 Stock engine 6 degrees of advance on the timing.
2) Raventai Mod.
3) Fan clutch (factory blue), thermostat and 1993-94 radiator replaced in the past week.
4) Toyota red coolant 50/50 with distilled water and 1/3 bottle of redline diesel water wetter (same as regular water wetter without the corrosion inhibitors).
6) Prior to cooling system replacement. Long uphill climb, 3/4 throttle, 3rd gear 2800 rpm, 215f before backing off in 75-80f weather. 210f in stop and go and idling at 85 f. 200f at 70mph heating to 210f at 80mph in 85f weather. All with A/C on.
Now: 17% grade 3/4 mile climb after exiting freeway (first gear climb) 205f in 92F weather (test previously aborted). Freeway 195f top at 80mph in 92f weather. Idling at drivethrough 200f. All with A/C running.
7) 215f before, 205f after new parts.
8) I would guess that 217f-220f would be a safe operating temp given that is where the A/C comes back on if the truck has gotten too hot. I remember most older cars had a 220-230f as a starting point for the red zone. I think it is reasonable to expect to see 200-205f on a regular basis in 80f+ weather.
1) Year of truck and any mods to the engine,
2) What gauge you have and where the sensor is mounted (if not the raventai mod),
3) Any cooling system upgrades, replacement parts, etc (radiator, fan clutch, which ones).
4) Coolant used, mixture ratio, and any coolant additives.
5) Temperatures observed while driving around town, sitting idling (i.e. drivethrough), on the highway at highway speeds, and the air temperature when you recorded these temperatures. Was the A/C on?
6) Highest coolant temperature observed.
7) Thoughts on the highest safe operating temperature.
I'll start:
1) 1996 Stock engine 6 degrees of advance on the timing.
2) Raventai Mod.
3) Fan clutch (factory blue), thermostat and 1993-94 radiator replaced in the past week.
4) Toyota red coolant 50/50 with distilled water and 1/3 bottle of redline diesel water wetter (same as regular water wetter without the corrosion inhibitors).
6) Prior to cooling system replacement. Long uphill climb, 3/4 throttle, 3rd gear 2800 rpm, 215f before backing off in 75-80f weather. 210f in stop and go and idling at 85 f. 200f at 70mph heating to 210f at 80mph in 85f weather. All with A/C on.
Now: 17% grade 3/4 mile climb after exiting freeway (first gear climb) 205f in 92F weather (test previously aborted). Freeway 195f top at 80mph in 92f weather. Idling at drivethrough 200f. All with A/C running.
7) 215f before, 205f after new parts.
8) I would guess that 217f-220f would be a safe operating temp given that is where the A/C comes back on if the truck has gotten too hot. I remember most older cars had a 220-230f as a starting point for the red zone. I think it is reasonable to expect to see 200-205f on a regular basis in 80f+ weather.
